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A GENERAL

''^-r^ k\tiA

OF

DOUBLE STARS

WITHIN 121° OF THE NORTH POLE

BY

S. W. BURNHAM

PART II.

NOTES TO THE CATALOGUE

PUBLISHED BY THE CARNEGIE INSTITUTION QF WASHINGTON

1906

A GENERAL CATALOGUE OF

DOUBLE STARS

WITHIN 121° OF THE NORTH POLE

BY

S. W. BURNHAM

PART II.

NOTES TO THE CATALOGUE

PUBLISHED BY

THE CARNEGIE INSTITUTION OF WASHINGTON

1906 r"'.

CARNEGIE INSTITUTION OF WASHINGTON

Publication No. 5

(Part Two)

PRINTED AT THE UNIVERSITY OF CHICAGO PRESS CHICAGO

ABBREVIATIONS AND REFERENCES

A R. G. Aitken.

His catalogues of new double stars are:

I. Nos. I to 47, A. N. 3635.

II. Nos. 48 to 109, A. N. 3668.

III. Nos. no to 203, Bui. L. 0. No. 3.

IV. Nos. 204 to 312, £u/. L. O. No. 16.

V. Nos. 313 to 429, Bui. L. O. No. 29.

VI. Nos. 430 to 645, Bui. L. 0. No. 50.

VII. Nos. 646 to Soo, Bui. L. O. No. 61.

VIII. Nos. 801 to 900, Bui. L. O. No. 66.

IX. Nos. 901 to 1250, Bui. L. O. No. 93.

These stars were discovered with the 36-inch and 12-inch Clark refractors of the Lick Observatory.

All the stars in catalogues VIII and IX, and a few in VII, were received too late for insertion in Part I, and are given in the Appendix to Part I.

A. G. Stars noted as double in the various A. G. cata- logues. Only those which have been measured, or examined by some later observer are given in Part I. These are numbered in order of R. A. The double stars in A. G. Helsingfors-Gotha are given with the Kr numbers used in Publications of the Lick Observatory, Vol. II.

A. J. Astronomical Journal.

A. N. —Astronomische Nachrichten.

Arabic figures in parentheses following the name of an ob- server, as. Do (3680), always indicate the number of the A. N. in which the measure is given.

Arg. Stars noted as double in the two Oeltzen-Argelander

star catalogues (+45° to -|-8o° and —15° to —31°).

/3 S. W^. Burnham.

The catalogues of new double stars are:

I. Nos. I to 81. Monthly Notices of the Royal Astronomi- cal Society, XXXIII, 3SI (March 1873). Discovered with the 6-inch refractor.

II. Nos. 82 to lot. Monthly Notices of the Royal Astro- nomical Society, XXXIII, 437 (May 1873). Discovered with the 6-inch refractor.

III. Nos. 107 to 182. Monthly Notices of the Royal Astro- nomical Society, XXXIV, 59 (December 1873). Dis- covered with the 6-inch refractor.

IV. Nos. 183 to 229. Monthly Notices of the Royal Astro- nomical Society, XXXV, 382 (June 1874). Discovered with the 6-inch refractor.

V. Nos. 230 to 300. Monthly Notices of the Royal Astro- nomical Society, XXXV, 31 (November 1874). Nos. 230 to 252 were discovered with the 6-inch refractor; Nos. 253 to 281 with the 9.4-inch refractor of the Observatory at Dartmouth College, and Nos. 286 to 300 with the 26-inch refractor of the Naval Observa- tory at Washington.

VI. Nos. 301 to 390. Astronomische Nachrichten,'iio.2ob2. Discovered with the 6-inch refractor.

XII.

XIII.

VII. Nos. 391 to 436. Astronomische Nachrichten, 'No. 210^. Also reprinted in the American fournal of Science (Sep- tember 1876). Discovered with the 6-inch refractor.

VIII. Nos. 437 to 452. American fournal of Science (July 1877). Discovered with the 18^-inch refractor of the Dearborn Observatory.

IX. Nos. 453 to 482. Monthly Notices of the Royal Astro- nomical Society, XXXVIII, 78 (December 1877). Dis- covered with the 6-inch refractor.

X. Nos. 483 to 733. Memoirs of the Royal Astronomical Society, Vol. XLIV. Discovered with the 18^ -inch refractor of the Dearborn Observatory. (This volume contains also measures of 500 other double stars with the same instrument.)

XI. Nos. 734 to 775. Report to the Trustees of the James Lick Trust of Observations made on Mt. Hamilton with reference to the Location of Lick Observatory, 1880. Observations with the 6-inch refractor on Mt. Hamilton in 1879. There are measures of a few of the old pairs with the same instrument. (This report is reprinted in Publications of the Lick Observatory, Vol. I). Nos. 776 to 863. Publications of the Washburn Observa- tory, Vol. I. Observations with the 1 5 ^ -inch equatorial of the Washburn Observatory, Madison, Wis., in 1881. (This volume contains also several hundred measures of other double stars.)

Nos. 864 to 1025. Memoirs of the Royal Astronomical Society, Vol. XLVII. Nos. 864 to 997 discovered with the 18^-inch refractor of the Dearborn Observatory; Nos. 998 to 1013 with the 12-inch of the Lick Observa- tory in October r88i; and Nos. 1014 to 1025 with the 18^-inch at Chicago. (This volume contains a large number of measures of Struve and other pairs.)

XIV. Nos. 1026 to 1038. Astronomische Nachrichten, No. 2875. Observation with the 12 and 36-inch refractors of the Lick Observatory. The numbers were inadver- tently omitted, but are given in the introduction to Catalogue XV. {Astronomische Nachrichten 2875 also contains measures of other stars.)

XV. Nos. 1039 to 1092. Astronomische Nachrichten, Nos. 2929, 2930. Observations with the 36-inch refractor, (Also measures of other double stars.)

XVI. Nos. 1093 and 1 154. Astronomische Nachrichten, Noi. 2956, 2957. Observations with the 36-inch refractor. (Also measures of other double stars.)

XVII. Nos. 1155 to 1224. Astronomische Nachrichten, Nos. 3047, 3048. Observations with the 36-inch refractor, and measures of other stars.

XVIII. Nos. 1225 to 1266. Astronomische Nachrichten, tHos, 3113,3114. Observations with the 36-inch refractor, and measures of other stars.

XIX. Nos. 1267 to 1274. Astronomische Nachrichten, Hoi, 3141,3142. Observations with the 36-inch refractor. (Catalogues XIV to XIX are given in Publications of the Lick Observatory, Vol. II.)

XX. Nos. 1275 to 1290. Publications of the Yerkes Observa- tory, Vol. I.

XXI. Nos. 1 29 1 to 1308. Publications of the Yerkes Observa- tory, Vol. II.

XXII. Nos. 1309 to 1336. Printed for the first time in this volume.

Burnkam: General Catalogue of Double Stars

^' Memoirs of the Royal Astronomical Society, Vol. XLIV.

Double star observations made in 1877-78 at Chicago with the 1 8 >^ inch refractor of the Dearborn Observatory.

I, Catalogue of 251 New Double Stars.

II. Measures of 500 Double Stars.

P^ Report of the Trustees of the fames Lick Trust of Obser- vations made on Mt. Hamilton in iSyg. Reprinted in Publications of the Lick Observatory, Vol. I.

P' Memoirs of the Royal Astronomical Society, Vol. XLVII.

Double star observations made in 1879 and 1880 with the 18^-inch refractor of the Dearborn Observatory.

I. Catalogue of 151 New Double Stars.

II. Measures of 770 New Double Stars.

^* Publications of the Washburn Observatory, Vol. I.

Measures with the l5J^-inch refractor in 1882.

^^ Publications of the Yerkes Observatory, Vol. II.

Measures of double stars with the 40-inch refractor of the Yerkes Observatory in 1900 and 1901.

^' Measures of double stars with the 40-inch refractor of

the Yerkes Observatory, 1900-1906, and the results, nearly ten thousand measures, printed for the first time in this General Catalogue.

Ba (I) Astronomical Observations at the Private Observa- tory of f. G. Barclay, 1862-64, Vol. I. Volumes II, III, and IV, containing measures 1865-77, ^^ referred to in a similar way. The measures before 1864 were made by H. Romberg, and after that time by C. G. Talmage.

Bes Bessel. Beobachtungen der Gegenseitigen Stellungen

von 38 Doppelsternen. (Berlin Acad., Abhand., 1833.)

Bl Astronomical Observations and Researches made at

the Dunsink Observatory, Third Part. Measures by R. S. Ball for parallax.

Bl (V)-

-Astronomical Observations and Researches made at

the Dunsink Observatory, Fifth Part. Measures by R. S. Ball for parallax.

Big Bigourdan. Annates de I'Observatoire de Paris. Ob- servations. 1883.

BM-

-Beer and Madler. Double star measures A. N. 280.

Biesbroeck Annates astronomiques de l' Observatoire Royal

de Belgigue, IX, nouvelle s6rie.

Observations d'^toiles doubles et discussion des mesures, par G. Van Biesbroeck.

(This work was received after the first 2'' R. A. of Part II were in type, and hence the measures cited commence with S 228.)

Bp Astronomical Observations taken at the Observatory

of George Bishop during the Years i8jq-i8^i.

Most of the measures are by W. R. Dawes; a few by J. R. Hind.

Bru Astronomical Observations and Researches made at

the Dunsink Observatory , 1868-69, First Part. Measures by Briinnow.

Bru^ Astronomical Observations and Researches m-ade at

the Dunsink Observatory, Third Part. Measures by Briinnow.

Gin Publications of the Cincinnati Observatory,

Observers : Ormond Stone, H. A. Howe, Winslow Upton, H. C. Wilson, and H. V. Egbert.

As many of the stars discovered at the Cincinnati Observ- atory have no original numbers, and others are identical with previously known pairs, it was considered best to re- number the stars of each observer in Part I in order of R. A.

Cin ' No. I . Catalogue of ^o New Double Stars Discovered

•with the ii-inch Refractor of the Cincinnati Observatory,

by H. A. Hovvfe.

Some of the stars are too far south for this catalogue.

Cin^ No. 2. Micrometrical Measurements of iy6 Double

and Triple Stars with the i i-inch Refractor of the Cincinnati Observatory, by O. M. Mitchel. Measures made principally in 1846-48.

Cin' No. 3. Micrometrical Measurements of 166 Double

and Triple Stars with the 1 1 -inch Refractor of the Cin- cinnati Observatory During the Years i8y^-y6.

Measures by Ormond Stone, H. A. Howe, and Winslow Upton.

Gin* No. 4. Micrometrical Measurements of ^ly Double

and Triple Stars with the 11 -inch Refractor of the Cin- cinnati Observatory During the Year 1877. Same observers as in No. 3.

Cin^ No. 5. Micrometrical Measurements of 10^4. Double

Stars with the i i-inch Refractor in i8y8-yg.

Measures by Ormond Stone, H. A. Howe, and H. V. Egbert.

Cin° No. 6. Micrometrical Measurements of ^j-j- Double

Stars with the 11 -inch Refractor During the Year 1880. Observers : Same as in No. 5.

Gin '" No. 10. Micrometrical Measurements of Double Stars

in 1882-86 with the 11 -inch Equatorial of H. C. Wilson.

Com George C. Comstock.

Com (VI) Publications of the Washburn Observatory, Vol.

VI, Part 2.

Measures by George C. Comstock, 1887-89.

Com (X) Publications of the Washburn Observatory, Vol.

X, Part I. Measures 1892-96.

Da-

-W. R. Dawes.

iv

Abbreviations and References

Da' Memoirs of the Royal Astronomical Society, Vol. VIII.

Micrometrical measurements of 121 double stars during the years 1830-33.

Da^ Memoirs of the Royal Astronomical Society, Vol. XIX.

Micrometrical measurements of double stars, 1834-39.

Da' Memoirs of the Royal Astronotnical Society, Vol.

XXXV.

Micrometrical measurements of double stars, 1839-65.

Da* -Appendix to last series of measures.

A Ercole Dembowski.

A (I, II) -Misure Micrometriche di Stelle Doppie e Multiple

Fatte Negli 1832-78, Vols. I and II. These volumes contain the most valuable, accurate, and com- plete series of measures ever published. They include all the S and OS stars, and most of the early /3 numbers, as well as many pairs from various other lists Each pair is fully observed on several nights. The results are necessarily largely quoted in this General Catalogue.

These volumes are supposed to contain all the measures of Dembowski. Many of them originally appeared in the Astronomische Nachrichten, and some of the early measures in Napoli Acad. Set. Mem. II, pp. 51-93, 1855-57, and these references are also given.

Do W. A. Doberck.

His observations are principally found in the Transactions of the Royal Irish Academy, and various numbers of the Astronomische Nachrichten, which are specially cited.

Dog Eric Doolittle.

Du-

Most of the measures are taKen from Publications of the Flower Observatory, Vol. I, Part 3. The observations were made with the 18-inch Brashear refractor. Vol. II, was issued after the first ii*" R. A. of Part II was in type, but many of the measures had been received in MS form, and are credited to this volume. The measures of the Hough stars will appear in a future publication of the Flower Observatory.

Mesures micromitriques d'itoiles doubles faites a rob- servatoire de Lund, par N. C. Dun6r Lund, 1876.

Dun Memoirs of the Royal Astronomical Society, Vol. III.

Approximate places of double stars in the Southern Hemi- sphere, observed at Paramatta in New South Wales by James Dunlop.

En Messungen von go Doppelstemen am SechsfUssigen

Refractor, by R. Engelmann.

Other measures by Engelmann are found in the A. N. and

cited by number.

Eng (II, III) Observations Astrono?nigues faintes par B.

UEngelhardt dans son Observatoire a Dresde. Parts II, III. Dresde, 1890.

Ek (I, III) Encke. Astronomische Bedbachtungen auf der

Koniglichen Sternwarte zu Berlin, Vols. I, III.

Fl Memoirs of the Royal Astronomical Society, Vol. XXII.

Results of micrometrical measurements of double stars made at Tarn Bank, Cumberland, 1850-53, by Isaac Fletcher.

Ferr Terza Serie delle Misure Micrometriche delle Stelle

Doppie fatte all' Equatoriale del Collegio Romano 1872- 74, dal P. G. Stanislas Ferrari. Roma, 1875.

Flm Catalogue des £toiles Doubles et Multiples en mouve-

ment relatif certain, par Camilla Flammarion. Paris, 1878.

All the measures to 1877 of stars having relative motion are arranged in chronological order.

Giacomelli (I) Atti della Reale Accademia dei Lincei.

Serie quarta, Vol. VI. p. 164. 1890.

(First series of measures by F. Giacomelli, 1888-90.)

Giacomelli (II) Atti della Reale Accademia dei Lincei.

Serie quarta. Vol. VI, p. 276. 1890. (Second series of measures.)

Giacomelli (III) Atti della Reale Accademia dei Lincei.

Serie quarta, Vol. VII, p. 80. 1891 (Third series of measures.)

Gl Memoirs of the Royal Astronomical Society, Yo\. XLII.

Measures of 484 double stars made at Crossley's Observatory, Halifax, by J. Gledhill.

Glasenapp (I) Mesures d'etoiles doubles faites a Hoursouf

par S. de Glasenapp. St. P^tersbourg, 1892.

Glasenapp (II) Observations astronomiques faites a Abas-

touman (deuxifeme s^rie des mesures d'dtoiles doubles). St. P^tersbourg, 1894.

Glasenapp (III) Mesures micrometrigues faites a St.Piters-

bourg et a Domkino (troisifeme sSrie des mesures d'etoiles doubles). St. PStersbourg, 1895.

Glasenapp (IV) Mesures micrometrigues d'etoiles doubles

faites a St. Petersbourg et a Domkino (quatrieme s6rie des mesures d'dtoiles doubles). St. Petersbourg, 1897.

Glasenapp (V) Mesures micrometrigues d'etoiles doubles

faites a Domkino et a St. Petersbourg (cinquieme s6rie des mesures d'etoiles doubles). St. Petersbourg, 1899.

]p —William Herschel.

The original catalogues of William Herschel were

printed as follows:

First Catalogue. Philosophical Transactions for lySa, Vol.

LXXII.

Second Catalogue. Philosophical Transactions for lySj, Vol.

LXXV.

Third Catalogue of 14S New Double Stars. Memoirs R.A.S.

Vol. I.

Additional notes concerning these stars will be found in Philosophical Transactions for 1803 and 1804.

Burnhani: General Catalogue of Double Stars

In 1866 Sir John Herschel collected his father's discoveries and observations in one catalogue entitled: A Synopsis of all Sir William Uerschel's Micrometrical Measurements and Esti- mated Positions and Distances of the Double Stars described by hhn, together with a Catalogue of those stars in order of Right Ascension for the epoch 1880 so far as they are capable of identification. {Memoirs R. A. S., Vol. XXXV.)

This work has been generally used here, although the origi- nal catalogues have been consulted in cases of doubtful identification. Many notes and corrections to the "Synopsis'' have been made, notably by Herbert Sadler (Monthly Notices R. A. S. XLV, 316), who carefully examined the original MSS. of Sir William Herschel, and compared them with the Philosophical Transactions^ and the compilation in'the Memoirs R. A. S., and detected many errors. I had some time previous to this called attention to other mistakes and omissions {Monthly Notices R. A. S. XXXIII, 567; XXXIV, 98).

I have used in this catalogue the designation of these stars given by Herschel in the original catalogues referred to, and not the current number in the "Synopsis."

H John F.W. Herschel.

I. First Catalogue (Nos. I to 321). Memoirs R. A. S. Vol. II.

II. Second Catalogue (Nos. 322 to 616). Memoirs R. A. S. Vol. III.

III. Third Catalogue (Nos. 617 to 1000). Memoirs R. A. S. Vol. III.

IV. Fourth Catalogue (Nos. looi to 1937). MemoirsR.A.S, Vol. IV.

V. Fifth Catalogue (Nos. 1938 to 3241). MemoirsR.A.S. Vol. VI.

VI. Sixth Catalogue (Nos. 3242 to 3346). Memoirs R. A. S. Vol. IX.

VII. Seventh Catalogue (Nos. 5450 to 5533). Memoirs R. A. S. Vol. XXXVIII.

VIII. Results of Astronomical Observations Made During the Years 1834-38 at the Cape of Good Hope. London, 1847 (Nos. 3347 to 5449).

H' Memoirs of the Royal Astronomical Society, Vol. V.

Micrometrical measures of 364 double stars with a 7-foot equatorial achromatic telescope, taken at Slough in the years 1828, 1829, 1830.

H' Memoirs of the Royal Astronomical Society, Vol. VIII.

Second series of micrometrical measures of double stars, chiefly performed with the 7-feet equatorial at Slough in the years 1831, 1832, and 1833.

H' Results of Astronomical Observations Made During

the Years i8j.).-j8 at the Cape of Good Hope, p. 249. London, 1847.

Micrometrical measures of double stars with the 7-foot equa- torial taken at Feldhausen, Cape of Good Hope, in the years 1834, 1835, 1836, 1837, and 1838.

Hd Annals of the Harvard College Observatory ,'V oX. XIII,

Part I.

Contains si list of new double stars (Nos. 1 to 179) with approximate places ; and also measures of pairs from the catalogues of Struve, Herschel, and others. The observations were made principally by J. Winlock, C. S. Peirce, and G. M. Searle, 1866-70.

HI Asaph Hall.

I. Washington Observations 1877, Appendix VI. Observations of double stars made at the United States Naval Observatory, 1875-79, by Asaph Hall.

II. Washington Observations 1888, Appendix I. Observations of double stars made at the United States Naval Observatory, 1880-91, by Asaph Hall.

These measures were made with the 26-inch Clark refractor of the Naval Observatory.

Hn Edward S. Holden.

Two lists of stars discovered with the ij^^-inch of the

Washburn Observatory:

Nos. I to 60. Publications of the Washburn Observatory,

Vol. I, 77.

Nos. 61 to 171. Publications of the Washburn Observatory,

Vol. II, 99.

Of the second list, four were discovered at the Caroline Island, and are too far south to be given in this catalogue.

Ho G. V^. Hough.

His discoveries with the iBj^-inch refractor of the Dearborn Observatory have been published as follows :

I. Nos. I to 209, A. N. 2778-79.

II. Nos. 210 to 303, A. N. 2977.

III. Nos. 304 to 490, A. N. 3233-34.

IV. Nos. 491 to 622, A. N. 3557-58.

Hu W. J. Hussey.

His catalogues of new double stars are :

I. Nos. I to 100, A.J. 480.

II. Nos. loi to 200, A.J. 485.

III. Nos. 201 to 300, A.J. 494.

IV. Nos. 301 to 400, Bui. L. O. No. 12.

V. Nos. 401 to 500, £ul. L. O. No. 21.

VI. Nos. 501 to 600, Bui. L. O. No. 27.

VII. Nos. 601 to 700, Bui. L. 0. No. 57.

VIII. Nos. 701 to 800, Bui. L. O. No. 65.

IX. Nos. 801 to 1000, Bui. L. O. No. 74.

X. Nos. looi to iioo, Bui. L. O. No. 77.

XI. Nos. iioi to 1200, Bui. L. O. No. 81.

These stars were discovered with the 36-inch and 12-inch Clark refractors of the Lick Observatory.

Nos. 828 to 1200 were received too late for insertion in Part I, and are given iri the Appendix to Part I.

J W. S. Jacob, Madras Observatory.

J' Memoirs of the Royal Astronomical Society, Vol. XVI.

Double stars observed at Poonah in 1845, 1846.

J^ Memoirs of the Royal Astronoinical Society, Vol. XVII.

Catalogue of double stars deduced from observations made at Poonah from November 1845 to February 1848.

J^ Memoirsof the Royal Astronomical Society, VoX.X.'KNlW.

Micrometrical measures of 120 double or multiple stars taken at the Observatory at Madras in the years 1856-58.

Je J. Jedrzejewicz.

Mesures microm^triques des 6toiles doubles Ji Plonsk. These observations, made with a 6>^-inch refractor, are all given in various numbers of the A. JV., which are cited in the references.

Abbreviations and References

K Annalen der Sternwarte in Leiden, Vol. Ill, 1872.

Measures by F. Kaiser.

Kn Memoirs of the Royal Astronomical Society, Vol. XLIII.

Micrometrical measures of double stars 1860-73, by George Knott.

Kr Stars noted as double by Krueger in A. G. Helsingfors-

Gotha. The first measures of these pairs are found in Publications of the Lick Observatory, Vol. II. The serial numbers given there are retained here, as they have been used by later observers.

Ku Double stars discovered by F. Kustner {A. N. 3821).

LM Publications of the Leander McCormick Observatory ,

Vol. I, Part 4.

Measures of double stars with the 26-inch refractor, by F. P. Leavenworth and Frank Muller, 1885, 1886.

Lu (I, II, III) Konigsberg Observations, Vols. I, II, III,

1857-70.

Measures by E. Luther.

Lv-

-F. P. Leavenworth.

Lv' Micrometrical Measurements of Double Stars made at

the Haverford College Observatory, 1888, under the direction of F. P. Leavenworth.

Ma J. H. Madler.

Ma {F. S. I, II) Untersuchungen iiber die Fixstern-Systeme

von Dr. J. H. Mddler. Leipzig, 1847.

A large folio volume in two parts of over 500 pages, and con- tains measures, etc., not found in the Dorpat Observations.

Ma (IX, X, etc.) Dorpat Observations, Vols. IX, X, XI,

XII, XIII, XV.

These volumes contain measures by Madler at Dorpat, 1 840-62.

Maw (I) Memoirs of the Royal Astronomical Society ,V o\. L.

Double star observations, 1888-91, by W. H. Maw.

Maw (II) Memoirs of the Royal Astronomical Society,

Vol. LI.

Double star observations, 1892-94, by W. H. Maw.

Maw (III) Memoirs of the Royal Astronomical Society,

Vol. LIII.

Double star observations, 1895-98, by W. H. Maw.

Maw (IV) Memoirs of the Royal Astronomical Society,

Vol. LIV.

Double star observations, 1899-1901, by W. H. Maw.

Mh Publications of the Cincinnati Observatory , No. 2.

Micrometrical measurements of 176 double and triple stars, observed with the 11 -inch refractor of the Cincinnati Observ- atory, by O. M. Mitchel. These measures were made in

1846-48. A few of these measures were first printed in Vols. I and II of Mitchel's Sidereal Messenger, which was issued in 8-page numbers during those years.

Mu Annalen der K. Sternwarte bei Miinchen, Vol. XVII.

Measures by Laraont.

P' Memoirs of the Royal Astronomical Society, Vol. XXV.

Observations of double stars taken at Madras in 1853-56 by E. B. Powell.

P ^ Memoirs of the Royal A stronomical Society, Yo\. XXXIII.

Second series of observations of double stars taken at Madras in 1859-62 by E. B. Powell.

Per Annates de I'observatoire de Nice, Vol. II.

Measures by Perrotin, 1883-86. These measures are printed in A. N. 2529, 2559-60, 2684-85, and 2748-49.

Pk Annals of the Harvard College Observatory, Vol. XI,

Part 2.

Catalogue of magnitudes of unequal double stars.

-Astronomical Observations made at the University Ob- servatory, Oxford, No. I, by W. E. Plummer.

Pl-

Pt-

-Publications of the Morrison Observatory, Glasgow, Mo., No. I.

Measures with the 12^-inch refractor (1876-81) by C. W. Pritchett, H. S. Pritchett, and C. W. Pritchett, Jr.

Ra Radcliffe Observations.

The number of the volume is given in Roman numerals.

S Stellarum Duplicium et Multiplicium Measurea Micro-

metricae. Petropoli, 1837.

W. Struve's great Dorpat catalogue.

SI -Additamentum in F. G, W. Struve Mensuras Micro-

metricas Stellarum Duplicium.

Contains later measures of about 45 stars.

a Dorpat Observations, Vol. III.

Catalogus 795 Stellarum duplicium.

One of Struve's early lists, given without measures, and only referred to when the stars are not included in his later cata- logues.

OS Otto Struve.

The Poulkowa Catalogue of Double Stars Discovered by Otto Struve, was printed in 1843, ^"d ^ second, corrected edition in 1850, in which certain of the stars were rejected when the distance of the companion exceeded 16".

The OS wide, bright stars, are designated in the same way as the S similar pairs which are given in the Appendices to Mensurae Micrometricae, by "App.," and the serial number of the catalogue.

Special attention is called to Publications of the Lick Observ- atory, Vol. V, containing measures of all the OS stars by Hussey, with all the published measures to about 1899 ar- ranged in chronological order.

Burnham: General Catalogue of Double Stars

02 (IX, X) Poulkowa Observations, Vols. IX, X.

Measures at Poulkowa by Otto Struve.

H2 (XII) Publications de Poulkovo, S^rie II, Vol. XII.

Mikrometermessungen von Doppelsternen ausgefuhrt am 30-zolligen refractor zu Poulkowa von Hermann Struve.

S Philosophical Transactions of the Royal Society, 1826.

Observations of the apparant distances and positions of 458 double and triple stars, made in the years 1823, 1824, and 1825, by James South.

Sh Philosophical Transactions of the Royal Society, 1824.

Observations of the apparent distances and positions of 380 double and triple stars, made in the years 1821, 1822, and 1823, by J. F. W. Herschel and James South.

Se Catalogo di IJBI Stelle Doppie Misurate col grande

Equatoriale di Merz all' Osservatoris del Collegio Roma, i8j6-jQ, by A. Secchi.

Se' Appendix to the last work.

Se" Serie Seconda delle Misure Micrometriche fatte all'

Equatoriale di Merz del Collegio Romano, 1863-66, by A. Secchi.

Se' Osservazioni di Stelle Doppie, i8jj-^6, by A. Secchi.

Sk Memoirs of the Royal Astronomical Society ,Wo\. XLVI.

Thirdcatalogue of micrometrical measures of double stars made at the Temple Observatory, Rugby, by Geo. M. Seabroke. The first two catalogues are by Wilson and Seabroke (see WS).

Sk^ Memoirs of the Royal Astronomical Society, Vol.

XLVIII.

Fourth catalogue of micrometrical measures of double stars made at the Temple Observatory, Rugby, by Geo. M. Sea- broke.

Sk' Memoirs of the Royal Astronomical Society, No\. L.

Fifth catalogue of micrometrical measures of double stars made at the Temple Observatory, Rugby, by Geo. M. Sea- broke, A. P. Smith, and H. P. Highton.

Sk* Memoirs of the Royal Astronomical Society, Vol. LI.

Further measures of double stars made at the Temple Observ-

atory, Rugby, during the years iS broke and H. P. Highton.

)0-95, by Geo. M. Sea-

Sk"

Memoirs of the Royal Astronomical Society, Vol. LIV.

Further measures of double stars made at the Temple Observ- atory, Rugby, during the years 1895-1901, by Geo. M. Seabroke, H. P. Highton, E. C. Atkinson, and R. G. K. Lempfert.

Sp Schiaparelli.

Sp (I) Misure di alcuni Principali Stelle Doppie, i8j$-8s,

col Refrattore di Merz del R. Osservatoris di Biera in Milano, da G. V. Schiaparelli.

Sp (II) Osservazioni Sulle Stelle Doppie. Serie Prima

comprehendente le misure di 46J systemi eseguite, col Refrattore di otto pollici di Merz, negli anni 1873-8^, da G. V. Schiaparelli.

Sp (III) Unpublished measures. These are principally of

the 02 and /3 pairs.

T K. J. Tarrant. Measures with loX-inch reflector at

his private observatory near London, 1885-92. The observations are printed in A. N. 2866, 2898-99, 2991, 3185-86.

UL Publications of the Washburn Observatory, Vol. V.

Measures of double stars with the i5>^-inch refractor of the Washburn Observatory in 1886 by Milton Updegraff and Alice M. Lamb.

Wh Ergdnzung-Heft zu den Astronomischen Nachrichten,

1849-

Measures of double stars with the Konigsberger heliometer,

1833-47, by Wichman.

Wn -A. Winnecke.

Wn (V) Astronomische Beobachtungen auf der Koniglichen

Sternwarte zu Berlifi, Vol. V, p. 255. Measures by Winnecke in 1855 and 1856.

Wr Memoirs of the Royal Astronomical Society , Vol. XXIX.

Catalogue of the positions and distances of 398 double stars. By Lord Wrottesley. The measures are all by Morton, Simms, and Philpott, from 1854 to i860.

WJ Madras Observations, 1848-52, first series.

Measures by Worster and Jacob.

WJ^ Madras Observations, second series.

WS Memoirs of the Royal Astronomical Society, Vol. XLII.

Catalogue of micrometrical measurements of double stars made at the Temple Observatory by J. M. Wilson and G. M. Seabroke.

WS^ Memoirs of the Royal Astronomical Society, Vol.

XLIII.

Second catalogue of micrometrical measures of double stars made at the Temple Observatory by J. M. Wilson and G. M. Seabroke.

TiU

NOTES TO GENERAL CATALOGUE

Burnham: General Catalogue of Double Stars

0»'

NOTES TO GENERAL CATALOGUE

26^ 3. P 1 155. Discovered with the 36-inch. Apparently

without change.

1898.64 9i?i of42 A

1902.92 92.9 0.59 IM L

[3 {XVII). ..p (3047). ..p (/>K*. L. O. II). ..A (3584)... Lewis I^Mon. Not.

Lxm, 403)...]

7. p 1014. Discovered with the i8|^-inch. Probably no

relative change. According to Porter this star has no appre- ciable proper motion.

I '15 L

1-55 P

I. 18 IK L

[fi (XUI) ... 33 (App) . . . p (3113) .. . 3 (/=»*. L. O. 11) (/'k*. K O. I) .. . Lewis Mon. Not. LIX, 400; LXIU, 403) . . .]

8. 2 3064 rej. The only late measures are :

1879.61 353°9 23'78 Cin 7.0...10.0 1901.76 357. 2 23.85 j8 7.2. ..10.4

[H(IV)...Cin6...35]

I 28

1897.94

304-1

1898.65

337-4

1902.01

356.1

10. 2 3063. Slow retrograde motion, and probably a binary of long period.

1865. 55 1877.88 1900. 11

[Ma(/?. 5.I)...J (I)

224?3 223.3 218.7

ir8i 1.81

A Dog

A (i573)...Sk3...Pt...Hl (1,11) (.Wash. Oijoj. 1884) ...Cin«...Cin6... Wilson (CinlO)...LM...Flm...Callandreau (Bul.Ast.XIl, 523). ..pi.. .32.. .Collins (A. J. 378) .. .Doo {,Pub. Flower Obsy. I)]

« 33 12. H 1935. Identified and measured :

1903.80 7?7 14^95 /36 8. 7... 8. 8

I 39 13. See 2. Cogshall could not see any companion in

1 899 at the Lowell Observatory. [See {.A.J. 431) .. .Cogshall (A. J. 505)]

I St 14. S 3065 rej. No early measures.

1901.82 289?! 9 '49 p

[Boeger (/4. /. 522) .. .|8S.. .]

S.6...8.7

« 15. OS (App) 256. B is Lalande 47312.

1886.28 Ii6?2 103^64 Franz

[J (I)... Franz (3080)...]

19. a Andromedae. 2 13, App. II. (= 5 V. 32 = H 1937.) The change in the position of the companion is due to the proper motion of A. Auwers gives this as of 200 in the direc- tion of I4i?2. The measures of the companion by S, OS, A, Ho, and /3 give for this movement, o'igS in 140^3. Spectro- scopic binary (Slipher, A strop hy sic al Jour. XX, 146).

1869.25 1879.72 1893.88 1903.67

27I?0

272. 1

274.0 275.2

69^50

70.27 72.20 73-93

A

/3 Ho

[Dal. ..J (II) (i736),..Slc...Flm.../33...02 (X)...Ho (3234) .. .Sk6., .Engel-

hardt (11,111). IU...36...]

.Doolittle {Pub. Flower Obsy. I) .. .Annals Toulouse Obsy.

20. Hd I. Examined by me in 1903 ; no near companion to this star. There is a 13 m, 273^4; 58^2 (1903.79). No pair like Hd i found in the vicinity.

21. 2 2. An interesting binary system, but the period is still uncertain, as the arc described is only about 180°, and the apparent motion is practically rectilinear. This star has

2 36

1890 f 1892

-Hf^

0''0 O'U 0"!i o''3 t/'i 0^5 O'^G

I 1 I 1 1 1 1

SCALE

Z2

a proper motion of 0^107 in iii?9 (Bossert). Glasenapp from measures to 1893, finds 156.62 years. Some of the positions are :

259

O^'

Burnham: General Catalogue of Double Stars

'88'

3 36

1840.56

338?4

of 74

OS

1848.22

334-9

0.52

OS

1858.50

329.3

0.44

lOK

OS

1869.80

single

OS, ^

1890.82

177.1

0.29

/3

1892.38

168.3

0.30

in

^

[Ma(i?. S'. I). ..Ma (IX, XI, XIII, XV). ..Dal. .A (I).. ./I (1736) .. .Ba (II) .. . WS...Se (Cow/, Rend. XLVIII, 375) ., .Se2.. .Do (2196) (Trans. R. I. ^fa^f. XXIX, Part 13).,. Do (2989). ..HI (I, II) .. .Sk.. . Sk3 .. . Flm .. .p (Knowledge, March, 1891) . , .38 . . .(3 (3048, 3141) . . .T (2991) . . .02 (IX,X, 149) ...Glasenapp (n)...Big (Bui. Ast. XII, 299) .. .Glasenapp (3145) .. .Everett (Mon. Not. LVI, 464)... Com (Put. Washburn Oisy.X) .. .YiX (XII)...]

(See p. 1055)

23, 2 I. Probably without change.

1866.33 286?6 9^59

1868.37 286.4 9-52

1904.68 287.0 9.70 2H

[Ma(/-. 5.I)...Ma(X,iXI, XIII, XV)...H1...H2...G1...WS. /36...]

A Du

.DU...J (II)...

2K

HS

P

P

24. P Cassiopeiae. A. G. C. 15. Discovered by Alvan G. Clark. The proper motion of the principal star is o.'55o in the direction of iio?2 (Auwers). The change shown by the later measures corresponds exactly to the movement of A.

1900.70 204?2 22*66 ^

[P(2956)...P (/>««. i.O. II)... /36...]

26. P 483. Discovered with the 18^-inch; one of a wide pair. Probably unchanged.

1885.83 44?o 3ro9

1891.70 44.1 2.95

1898.59 42.7 3.05

[p(X)...pl...P(3ii3)...P(.P''*. -t. ". II) (Pub. K. O. I)...HS (XII)...]

27. Arg. I. "Duplex'' in O. Arg. N. No other meas- ures than /35. The components are DM (58°) 4 and £. The A. G. positions give, 143^6 : 22^59 (1873.7).

28. H looi. R. A. I"" too large in H.

1901.74 77°6 I5'76 2n ^5 8. 5... 9.1

30. k' Sculptoris. p 391. Discovered with the 6-inch. The measures do not show any certain change.

1888.88

92?5

o'94

Lv

6.1.

.6.1

1892.88

88.0

0.75

2n

Gla

6.1.

.6.1

1895.83

91.0

0.93

A

1895.85

91.0

0.98

Scott

1897.07

93-5

1.24

See

6.4.

.6.4

1898.69

270. 1

1.09

2K

Bd

7.0.

.7.2

\fi (VII).. ./3 (2103). ..Cin 3.. .Cin*. ..Lvl.. .Glasenapp (II) ,. .Sailors (3303, 3420) ...Scott (Brit. Ast. Asso., VI, 368) (Mon. Not. LIX, 427; LXIV, 52)... Aitken (3395). ..See (3495) .. .Boothroyd (A. J, 478). ..Sola (3679).. .^fjw. Aro<.LXI,S77.,.Do(3798)...]

31. A 430. Discovered by Aitken at Mt. Hamilton (Bui. L. O. No. so).

32. 0. Stone i. Discovered by Stone at Cincinnati. 1887.97 io8?i 9'95 Lv

1902.85 io8?4 10.1 Scott

[Cin 5.. .Lvl.. .Wilson (Cin 10) .. .Scott (Mon. Not. LXIV, 52)]

33. P 484. Discovered with the 18^-inch. Without change. The following are all the later measures :

1885.74 i54°7 ''90 HS

1891.30 155.3 1-88 ^

1901.03 155.4 1-76 ^°°

\p (X).. .pi.. .|3 (3048, 3113)...? (Pub. L. O. II).. .H2 (XII) .. .Doolittle (A. J.

547) (Pub. Flower Obsy. I) . . . ]

35.

S 4. Probably fixed.

1865.39 92°4

S'14

A

1899.78 93-2

5-32

bn

Doo

1903.76 93.7

5.24

P

'a8=

3 39

3 38

[U^(F. S.I)... Ma (X).,. H1...H 2. ..Se...<d (II)... Glasenapp (U). ..Doolittle (Put. Flower Obsy. I).. .Annals Toulouse Obsy. III.. .p6...]

36. H 1939. The declination in H is 5 ' too small. The 3 41 correct place is given here. Some error is probable in my single distance.

1877.81 159?! 36'o8 /3'

1901.67 161. 2 34.92 ^^

37. 23. (=511.83 = 8381.) H^ observed a small star in this field, l33?o : 4*57 : 7-8. .. 11-12, and says "possibly the small star is mere illusion.'' I have never been able to see it. No change in the S stars.

1869.98 84^5 4.87 A

1901.74 83.4 4.83 2K /3

[Ma (F. S. I)...Bp...Wr...Ma (XI) .. .HI.. .H2. ..Gl,. .Ra (XXII) .. .Du.. . Se...Sk...Sk2,..zl (II)... Glasenapp (lU) . . .p5. ..]

38. ^^Piscium. 25. (=Hi.) Probably unchanged. H called the small star blue. The proper motion of the large star is very small, o!'oi2 in 104° 3 (Auwers).

1866.26 i6o?4 7!'86 4K A

1880.78 160.0 7.82 ^

1903.86 159.9 7.82 3K j3

[Ma (F. S. I).. .Ma (XI, XIII).. .Se.. .Se (1017) .. .Se3.. . 4 (II).. .Glasenapp (II)...|33..,;36...]

40. 2 6 rej. Measures from Harvard Annals. The only other measures are :

1901.67 I92'i'7 2irii /3s 8.9. ,.10.5

41. P 253. Discovered with the 9.4-inch at the Dart- mouth College Observatory. This is the n star of a wide pair, 38' « of /3 Cassiopeiae. Change, if any, is slow.

3

260

Notes to the Catalogue

0''

4 39

1890.40

49-0

of 62

/3

1900.86

45-8

0.56

Doo

1901.33

45-2

0.49

A

[PCV)

.../3 (;I/o«. iVoi!. XXXV, 3i)...p (2956, 3II3),..|3 (Puh.L. O. II)...i (I) ...A (Bui. L. O. No. 11)... Bryant {_Moti. iV»<. LXI, 486 ; LXII, 383) .. .Doo- littlc (A. J. 547) (Pai. Flower Obsy. I) .! .]

43. P 485. The duplicity of this star was suspected at the time of finding /3 253, and subsequently verified with the i8j^-inch. It is one of a small triangle of stars between iS 253 and /3 Cassiopeiae. Without change. 1889-55 307-4 0^44

1891.52 307.6 0.43

1892.96 305.9 o.28±

1901.33 305.7 0.37 3K

[^ (X). ..;3i.. ,/3 (2956, 3113) .. .3 (Pul. L. O. II).. .Sp (in). ..A {Bul.L. O. No. 11). ..Bryant (,Mon. Not. LXII, 383) . . . Doolittle {A. J. 547). ..]

;8

/3

Sp

A

4 38 45. Kr I. Noted as double by Krueger in A. G. Heh.

Without change.

1898.68 i90?o I '95 Doo

[P (3042). ..p (i. O. II). ..Bryant {Mon. Not. LX, 494; LXI, 486; LXII, 383). .. Doolittle (Pub, Flower Obsy. I) . .. ]

4 40 46. H 5450. No description in H. There is no DM

star in this place, and I could not find anything that seemed likely to be the one referred to by him. Two pairs in the vicinity were measured (see Nos. 58 and 75).

4 49. H 617. "A third 18 m at 4" 1320° suspected."

Measured with the 40-inch ; no third star seen.

1901.06 6o?6 13 '36 3K

9.2. . . 12.7

50. Hd 2. Since the first part of this Catalogue was in type, I have looked up this pair, and find an error in the Hd place, where it is given as DM (7°) 13. It is DM (7°) 5, 7.5 m in DM, and 8.2 in A. G. (=L 47338). The place (1880) is, R. A. 0"* 2"" 39'; Decl. 21 '. Unless the single measure is erroneous, there has been a decided change in the distance. The Paris Catalogue gives no proper motion for this star. The following are all the measures :

1877.83 119% i2f8o \n /3

1899.33