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Home , New General Catalogue, NGC 17, NGC 40

ASTRONOMISCHE NACHRICHTEN. Nr. 4154. Band 174. 2.

Preliminary catalogue of Isaac Roberts’s collection of photographs of celestial objects. By Dorotha Isaac-Roberts.

The Isaac Roberts collection of celestial photographs The number of the copies of the forthcoming paper comprises 2485 original negatives of , -clusters, being very limited, the observatories and astronomers, official nebulae and other celestial objects together with many posi. or amateur, who are specially interested in photographic tives on glass and on paper, taken by the late Dr. Isaac astronomy will please send in their names to the address Roberts or, under his incessant supervision, by his assistant given below, early in 1907, in order that the various parts W. S. Franks, F. R. A. S., at Dr. Roberts’s Private Obser- of the complete catalogue may be sent to them in course vatory, Kennessee, Maghull, near Liverpool (1885-1 890) and, of time. from 1890 to 1904, at Starfield, Crowborough, Sussex. Positives- on-glass reproduced from the Isaac Roberts Of the above mentioned negatives, negatives will be lent for the purpose of micrometric mea- I) 1412 were taken with the zo-in Reflector (focal surements, if, application be made and provided that the length = 98.0 ins) and with an exposure of the plate of documents be returned after completion of the measurements. ninety minutes in general. In the preliminary catalogue given below, the numbers 2) 648 with the 5-in Cooke lens (f. 1. = 19.22 ins) of Dr. Dreyer’s of Nebulae and which was mounted on the tube of the zo-in Reflector; or, Clusters of Stars and of Dr. Dreyer’s Index Catalogue have in some cases, with the 4-in Voigtlander (f. 1. = I 1.2 ins) been made use of; and, in order to save still more space, or with the 31/2-in Dallmeyer (f. I. = 9.56 ins). The ex- the NGC. numbers and the Ind. C. numbers for the con- posures with the Reflector and the Objective were simul- secutive hours of right ascension have been tabulated, the taneous. units of the first and second order forming the table, the With the exception of 140 negatives which are on units of the third and fourth orders are placed to the left plates 6 ins x 6 ins, the Isaac Roberts negatives measure of the line. 4 inches by 4 inches and are covered by a’ field of two de- The NGC. and Ind. C. numbers marked with a refer grees in diameter with the 20-in Reflector, 11 degrees in to published data found in: diameter with the Cooke lens, I I degrees in diameter, without too much distorsion, by the Dallrneyer, Voigtlander I. R. I 1 Isaac Roberts’s photographs of stars, star-clusters and Lerebours lenses. I. R. I1 J and nebulae, volumes I and I1 In the early days of Isaac Roberts’s astrophotographic .4. N. Astronomische Nachrichten career, many experimental plates were taken by him with Kn. Knowledge lenses ranging from three-eights to four inches in aperture. Obs. Observatory During the years 1885 and 1886, at Maghull, with R. I. A. Royal Irish Academy his zo-in Reflector and an exposure of the plate of 15 mi- M. N. Monthly Notices of the Royal Astr. Society nutes, he took Ap. J. Astrophysical Journal B. A. A. British Astronomical Association 3) 425 negatives, with the object of making a com- A. S. P. Astronomical Society of the Pacific plete chart of the heavens on a scale double of that of Bulletin de la Carte du Ciel. Argelander. The work was discontinued in 1887, in consequence placed after NGC. or Ind. C. numbers serve to in- of the International Astrophotographic Congress undertaking dicate that on the corresponding Isaac Roberts plates new to execute it. nebulae, not recorded in the catalogues, have been found. As soon as circumstances permit, a complete list of The present preliminary catalogue is published with Isaac Roberts’s tribute to astronomy will be published in the hope that the Isaac Roberts documents of celestial ob- accordance with the wishes and instructions of the deceased. jects may be of immediate service to astronomy.

2 19 4154 20

Preliminary catalogue of Isaac Roberts's collection of photographs of celestial objects.

RA. oh.

NGC. o 12i 23~29~ 56, 681 83 NGC.205, 221, 224: I.R.131~I.R.1163,M.N.49.65,Obs.12.94. I I0i 29~367 461 47, 85 - NGC. 246: I.R.11 123. - NGC. 253: Kn. 1900 p. 132. - 2 05-1 21', 24', 251 46', 471 53'~ 781 81' NGC. 281 : 1. R.11 147. - Ind. C. 59: I. R.133, I. R. I1 159~ 1nd.C. o 11, 59' Kn. 1898 p. 106 Nebulae on I. R.pl. 1728.(1890 Jan. 17) Nova Andromedae M. N. 51.116 Nova Tycho M. N. 50.359 Variable (Barnard) Ceti Herschel's nebulous regions No. I, 2, 3, 4, 5, A. N. 3836, Ap. J. 17.72 6, 8, 9' 10 Star magnitudes. Pickering's Chart No. I M. N. 45. I 24 (Prof. E. C. Pickering) (80) Sappho M. N. 47.265 Comet Holmes 1892 I11 Chart plai 5: Decl. 76", 74" M. N. 49 p. 13 p. I 18, Bulletin de la Carte du Ciel I p. I 5 I

RA. I~. NGC. 3 NGC. 393 = I. R. 2494, on pl. a new spiral 63" p. 14' 56" s. 4 of H.I. 54. - NGC. 581: I. R.1 35, M. N. 53.331. - NGC. 5 598: I.R.11 65, M. N. 56.70, Kn. 1896 p. 158, Proc.R.1.A. 6 25 section A (Dr. J. L.E.Dreyer). - NGC. 628: I.R.11 67, 6 M. N. 54.438, Kn. 1897 p. 53. - NGC. 650, 651 : I. R.1 37. 7 - NGC. 654, 663: I.R. I1 29. - NGC. 672 = I. R. 2495, 1nd.C. I on pl. new nebulae, Obs. 20.245, A. N. 3429 see above

M. N. 53.65

Chart pl. see above

RA. zh.

NGC. 8 21i 69'1 84', 91'1 94, 95 NGC. 869, 884: I. R. 139, M. N. 50.315. - NGC. 891 l): I. R.1 9 36, 49, 57, 72 41. - NGC. 1023 = I.R. 1776, a new spiral nebula on pl., I0 12, 22, 23*', 27, 39*, 52, 60, 68', 84 M. N. 54.371. - NGC. 1039: I.R.1 43, M.N.53.357. - I1 56, 70 NGC. 1068: I. R. I 45, M. N. 53.331. - 1nd.C. 239, new spiral Ind.C. 2 3 9" Herschel's nebulous region No. 12 see above Chart pl. Decl. 86", 84", 82O, 80"' 78", 76O, 74", 1z0, 70° see above KA. 3h. NGC. 12 451 53 NGC. 1499: I. R. I1 149~Kn. 1899 p. 39 I3 00, 42 I4 441 53, 9'1 99' 1nd.C. 3 48 Nova Persei Yleiades and region around the I. R.1 47, I.R.11 161, Obs. 12.94, M.N. 47 p.24 p.90, 49 p.7 p. 120, 58.392 Coniet Wolf 189 I I1 Comet 1902 I11 Kn. 1903 p. 9 Neptune and its satellite M. N. 5' P. 439 Region of comet 1892 I1 photographed on Nov. 18, 1892, I. R. plate No. 1800

68", 66" see above

') NGC. 891 (H.V 19) = I. R. 1765, 2928, see M. N. vol. 65 plate 7, photographed under Dr. Isaac Roberts's supervision and direction at his private observatory Starfield 011 Dec. 21, 1891, and Jan. 14, 1901. 21 41.54 22

RA. 4h. NGC. 15 NGC. 1528: I. R.11 31. - NGC. 1579 = I. R. 1810, new ne- 16 bula on pl., A.N. 3429, Obs. 20.244. - NGC. 1618 = I.R. 2585, 5 or 6 nebulae in radius of I". - NGC. 1665 = I. R. 312 I, ten new nebulae on pl., M. N. 43.301 Herschel's nebulous regions No. I 4, I 5, I 6 77, 18, '9 see above Espin's object in B. A. A, vol. 8.279 Neptune and its satellite see above Cluster . a Tami Chart pl. Decl. 86", 84", 82", go0, 78", 76", 74", 72" lo", 68", 66", 64", 62", 60" see above

RA. 5h. NGC. 17 78, 88' NGC. 1788: Kn. 1901 p. 180. - NGC. 1952: 1.R.I 53, I.R. Ia 88 I1 169, Kn. 1896 p. 58. - NGC. 1960: 1.R. 151, M.N. I9 04, 07, 08, O9, 24, 27, 3'1 52*, 60', 16', 53.444. - NGC. 1976: I.R. 155, 57, 59, I.R.11 165, Kn. 19 82'1 90, 99 1897 p.100, M. N. 47.89, 49.295. - NGC. 1982: M. N. 49.295. 20 24, 68', 11*, 99' - NGC. 2068, 2071: Kn. 1895 p. 253, M.N.54.437. - NGC. 21 29, 427 58' 2099: I. R. 161, Kn. 1897 p. 10, M.N. 53.444. - NGC. 2158: 1nd.C. 4 05*1 I0, 17, '9, 231 24~251 261 27~28, Kn. 1901 p. 11. - Ind. C. 405: Kn. 1903 p. 81 4 301 31, 32, 341 351 39 Nova Aurigae (1892 Febr. I) I. R. I 49, M. N. 52.371, 53.123 Herschel's nebulous regions No. 20, 2 I , 2 2 23~240 25, 27 see above Stars in M. N. 50.326 Star magnitudes. Pickering's Chart No. z see above a Aurigae. a Orionis Chart pl. Decl. 88", 86", 84", 8z0, goo, 78", 76", 74" 72", loo, 68", 66", 64", 62" see above

LA. 6h.

NGC. 2 I 58'1 68'1 '101 743 7.5, 82, 851 94' NGC. 2168; I.R.1 63, Kn. 1901 p. 11, M. N. 53.443. - NGC. 22 34, 37.j 38'1 39'1 441 45, 51; 521 591 601 2158: Kn. 1901 p. 11, M.N.53.443. - NGC. 2194: I.R.11 22 61', 64', 81, 86, 87 33. - NGC. 2237, 2238, 2239: I. R.11 171, Kn. 1899 p. 132. 23 01, 04, O~I23' - NGC. 2261: Kn. 1901 p. 181. - NGC. 2264: Kn. 1896 1nd.C. 4 43 p. 40. - NGC. 2323: I. R. 165, M. N. 53.445 Nebula near 15 Monocerotis M. N. 55.398, Kn. 1896 p. 39 Herschel's nebulous regions No. 28, 29, 30 iee above :So) Sappho iee above cz Canis majoris Chart pl. lecl. 84", 8z0, go0, 78", 76", 74", 72", 7oo1 68", 66", 64", 62", 60" ;ee above

:A. 7h. NGC. 23 gGC. 2403: 1. R.11 69. - NGC. 2506: I. R.11 37, Kn. 1897 24 p. 10, M. N. 54.504. - NGC. 2437: I. R. I1 35, M. N. 54.370, 25 Kn. 1895 p. 182. - NGC. 2438: I. R.11 35, 125, M.N. 54.370, Kn. 1895 p. 182, Kn. 1897 p. 10 New nebula Monocerotis Zn. 1899 p. 249, Obs. 21.250, A. N. 3509, 4091 (Dr. M.Wolf) Nebula Barnard (Geminorum) a Canis minoris. / Chart pl. : Decl. 86", 84O, 82", 80°, 7go1 76", 74", 7z0, 66" ,ee above

2" 23 4154 24

RA. gh. NGC. 25 NGC. 2537 = I. R. 2819, new nebula on pl., A. N. 3857. - 26 NGC. 2632: I. R. I 67. - NGC. 2681 = I.R. 1882, other 27 nebulae on pl. - NGC. 2682 : I. R. I 69. - NGC. 2683: I. R. I 71, M.N. 54.137 Ind. C. page 187 M. 48 Monocerotis Comet 1894 I1 Chart pl. : Decl. 88", 86", 84", 82", goo, 76", 74", 72", 68', 66", 64", 62" see above

RA. 9h. NGC. 2841 : I. R.1 73, M. N. 54.93. - NGC. 2903, 2905 : I. R.1 75, M. N. 54.136. - NGC. 2976: I.R.11 71. - NGC. 3031 : I. R. I 77, M. N. 49.362. - NGC. 3034: I. R. I 77, M. N. 49.363. - NGC. 3079: I. R. I1 III.

M. N. 49.363 see above see above

33 I0, I91 s8*i 44, 461 S1, 591 671 701 771 3038, 1953, other nebulae on pl. - NGC. 3423 : I. R. I1 75. 33 79.1 84, 951 96 34 23.1 S2, 337 451 48~S8, 861 89 35 11, I3 Herschel's nebulous regions No. 33, 34, 35 see above Comet I 894 I (Denning) photographed on March 29, 1894. - I. R. pl. 2446 a and y Leonis Chart pl.: Decl. 88", 86", 84", 82O, goo, 78", 76", 74", 7z0, 70°, 68", 66', 64" see above

RA. II~. NGC. 35 NGC. 3556: I. R. I1 113. - NGC. 3587: I. R.31 127, M.N. 36 56.378. - NGC. 3623: I.R.11 77, Kn. 1895 p. 208, M. N. 36 54.507. - NGC. 3627: I. R.11 79, Kn. 1895 p. 208, M. N. 37 54.508. - NGC.36282): I.R.11 135, M.N. 54.508. - NGC. 38 3631: I. R. I1 81. - NGC. 3726: I. R.11 83. - NGC. 4038, 39 4039: Kn. 1901 p. 181. - NGc.4051: I.R.1185 39 40 see above M. N. 52.501

Chart pl. : see above

tA. 12~. NGC. 40 NGC. 4088: I. R. I1 87. - NGC. 4157 = I. R. 3045, other ne- 41 bulae on pl. - NGC. 4244: I. R. I1 137. - NGC. 4254: I.R. 41 I1 89. - NGC. 4303: Kn. 1901 p. 181. - NGC. 4321 : I.R. 42 I1 93. - NGC. 4365 = I. R. 21 15, twelve or more small faint 42 nebulae on pi. - NGC. 4449: I. R. I1 I '5. - NGC. 4485 : 43 I. R. I1 117. - NGC. 4486 = I. R. 2145, 2146, new nebulae 44 on pl. - NGC. 4490: I.R.11 117. - NGC. 4527 = I.R.

NGC. 3628 (H.V 8) = I. R. No. 1989, 1982, see M. N. 65 plate 7, photographed under Dr. Isaac Roberts's supervision and direction at hi: private observatory Starfield on Febr. 23, 1894, and April 19, 1903. 26 25 4154

NGC. 45 1714, new nebula on pl., A.N.3429, Obs. 20.244. - NGC. 45 4536: I. R. I1 95. - NGC.4552 = I.R. 2145, 2146, new 46 nebulae on pl. - NGC. 4559: I. R. I1 97; new nebulae on 46 I. R. pl. 2159, 2160, A.N. 3429, Obs. 20.244. - NGC.4565: 47 I. R.11 1393). - NGC. 4594: I.R.11 1414). - NGC.4631: 48 I.R.11 119. - NGC. 4656, 4657: I.R.11 121, M.N. 54.505. 49 - NGC. 4712, 4747: M.N. 55.13. - NGC. 4725: I. R.II 99, Kn. 1895 p. 207, M. N. 55.73. - NGC. 4736: I. R.1 81. - NGC. 4826: I. R. I1 Ior. - NGC. 4845: M. N. 55.13. - NGC. 4900: I. R. XI 129, M. N. 55.13 Herschel's nebulous regions No. 37, 38 see above Nebulous region, several nebulae on I. R. pl. 2 I 5 4 Nebulous region Dr. Max Wolf (Comae Ber.) A. N. 3704 Star magnitudes. Pickering's Chart NO. 3 see above Search for a planet beyond the orbit of Neptune M. N. 52.501 Comet 1902 I11 Kn. 1903 p.9 Chart pl. : Decl. 9o0, 84", 82"' go", 78O, 76", 74", 72", 70°, 68", 66" see above

$) NGC. 4565 (H. V 24) = I. R. No. 2161, 2162, see M. N. 65 plate 7, photographed under Dr. Isaac Roberts's supervision and direction at his private observatory Starfield on March 26, 1894, and on May 11, 1896. 3 NGC. 4594 (H. I 43) = I. R. No. 2167, see M. N. 65 plate 7, some remark as above, photographed on April 27, 1897. 41.54 28

RA. 17~. NGC. 63 NGC.6341: I. R. 199. - NGC. 6402: I. R. I1 175. - NGC. 64 6412 =I. R. 2297, new nebula on pl., A. N. 3429, Obs. 20.244, 65 M. N. 56.32. - NGC. 6514: Kn. 1900 p. 35. - NGC. 6523: Kn. 1900 p. 132 a Ophiuchi Chart pl.: Decl. 88", 86", 84", 82" I see above

RA. 18~. NGC. 65 68~I2i 83~95 NGC. 6603: I. R.II 39, Kn. 1896 p. 134. - NGC. 6611: I. R. I1 66 03'1 Il**j 139 18.1 261 331 431 451 56 15 I, cluster M. 16 involved in a large nebula which is not re- 66 64, g2, 831 94* corded in the catalogues. - NGC. 6618 : I. R. I 101. - NGC. 67 05', 09, 12, 20*, 28 6694: I. R.1 103. - NGC. 6705: I.R. I 105, I. R.11 41. - Ind.C.12 741 751 761 871 95 NGC. 6720: I. R.1 107, I. R.11 131, M. N. 48.29 Star magnitudes. Pickering's Chart No. 4 see above Cluster M. 25 Sagittarii a and E Lyrae Chart pl. : Decl. 84", 82O, 80' see above

RA. 19~. NGC. 67 NGC 6779: I. R.1 109. - NGC. 6804: I. R. I1 43. - NGC. 68 6838: I. R. I1 47. - NGC. 6853: I. R. I 113, M. N. 48.30. - 68 NGC. 6866 : I. R. I1 49. Ind. C. I 3 I.R.1 III, I.R.11 45, M. N. 47.22, 48.31

Kn. 1903 p. 9 Chart pl. : see above

LA. zoh. NGC. 68 64, 66', 85, 88*, 94' NGC. 6866: 1. R. I1 49. - NGC. 6888 : I. R. I1 143. - NGC. 69 05, 06, '0, 11, 131 141 26, 28, 301 341 6894: I. R. I1 133. - NGC. 6946: I.R. I1 105,- NGC. 6960: 69 39, 4Oi 46'7 52, 53, 60*~69, ~II9I*, 1. R. I 115, M. N. 52.544. - NGC. 6991: I. K.11 153, A.N. 69 92'r 94 3429, Obs. 20.245, M. N. 56.33. - NGC. 6992: I. R. I1 145, 70 oo*, 06, 08*, 09 Kn. 1897 p. 218. - NGC. 7000: I.R. I1 155, Kn. 1898 p. 253. Ind. C. I 3 12, Is*, 29, 44 - NGC. 7008: I.R.1 117. - Ind. C. 1318: Kn. 1902 p. 247 Region Cygni (stars in ) M. N. 47.22 Region around 60 Cygni Herschel's nebulous regions No. 4 2 , 43, 4 5 see above (433) Eras Comet 1902 I11 Chart pl. Decl. 88", 86", 84O, 82O, 80°, 78", 76", 7401 7 20~70" see above

LA. 21~.

NGC. 70 23'1 26~39'1 ~OI44'1 46~67~ 78'1 82*, 86' NGC. 7023: I. R.11 157. - NGC. 7039: I.R.11 51. - NGC. 70 881 89*, 92, 99 . 7044: I. R.11 53. - NGC. 7078: I. K.1 119. - NGC. 7082: 71 161 29'~42'~ S6, 711 751 77, 84 I. R.11 55. - NGC. 7086: I. R.11 57. - NGC. 7089: I.R. I1 Ind. C. I 3 60, 61, 69, 78, 92, 96 177. - NGC. 7129, 7142: I.K.II 59, M.N. 56.380 Region 6 Cygni. Region Nova Cygni (1876 Nov. 24) I. R. I 121, M. N. 52.372 Nebula Barnard Cephei Herschel's nebulous regions No. 40, 47, 49 see above (No. 42, Philos. Transactions, vol. 74) Chart pl. Decl. 84", 8z0, goo, 78", 76", 74", 72O, 70") 6 8" see above 29 41.54 30

RA. 2zh.

NGC. 72 09, 171 26, 43, 451 61~93 NGC. 7302 = I. R. 31 76, other faint nebulae on pl. - NGC. 73 02-p O9i 31*, 47, S2, 54, 711 93 7331: I. R. I 123. - NGC. 7448 = I.R. 3010, other faint 74 23, s8i 39, 48'~ 57, 791 q2' nebulae on pl. - NGC. 7492: M. N. 63.301 Ind. C.14 341 53 Herschel's nebulous regions No. 50, 51 see above Comet 1902 I11 Comet Encke a Pegasi. Vesta Chart pl. Decl. 88", 86", 84", 82", goo, 78", 76", 74", 72", 68" see above

RA. 23h. NGC. 74 NGC. 7479: I.R.1 125, M. N. 53.124. - NGC. 7541 = I.R. 75 2423, two faint nebulae near H. I1 430. - NGC. 7561 = I. R. 76 3180, other faint nebulae on pl. - NGC. 7585 = I. R. 3188, 77 other faint nebulae on pl. - NGC. 7654 : I. K.I 127. - NGC. 77 7640 = I. R. 3016, 3017, new nebula on plate zrn34' f. 30' 78 north of H. I1 600. - NGC. 7789: I. R. I 129, I. R.11 61, M. N. 53.125. - NGC. 7814: I. R. I 131, A.N.3429, Obs. 20.245, M.N. 53.358. - NGC. 7814 = I.R. 2439, four new nebulae on pl. - NGC.7822: M.N.63.301 Herschel's nebulous region No. 52 see above Chart pl., 3ecl. 86", 84", So", 78", 76" see above

Chhteau Rosa Bonheur By-Thomery, S.-et-M., I 906 October. Dorothea Isaac -Roberts.

Notiz uber die Helligkeit des Rometen 1905 IV (1906 b) in den erst>enMonat,en von 1907. Von Prof. Dr. B. IVei/r.

(Auszug aus einer der kaiserl. Akad. d. Wiss. am 10.Januar 1907 uberreichten Abhandlung.) Der Umstand, da13 der am 3. Mai 1906 von Dr. M. Z. Berlin A 1, AB A. Kopff auf photographischem Wege entdeckte Komet nach- 1905 Jan. 14.6226 +2!'6 +o!'g traglich auf einer von Prof. M. Wolf am 14. Januar 1905 1906 Marz 16.0 -5.3 -2.1 aufgenommenen Platte aufgefunden wurde, verbunden mit April 14.0 +3.0 -0.5 der groaen Periheldistanz desselben, laDt es nicht als ganz Mai 27.0 +1.9 -0.1 aussichtslos erscheinen, da13 er nochmals wird gesehen werden Eine fur Berliner Mitternacht geltende, nach diesen konnen, wenn er vor seiner niichsten Opposition im Mai Elementen berechnete, mittlere Orter fur I 907.0 liefernde I 907 stationar werden wird. Ich berechnete daher als Grund- Ephemeride lautet: lage fur die weiteren Untersuchungen aus der Aufnahme vom 14. Januar 1905 und drei Normalortern, gebildet aus '907 a d log A Beobachtungen zwischen dem 3. u. 9. Marz, 11. u. 17. April und 23. u. 3 I. Mai das nachstehende Elementensystem: Febr. 13 14h59" 7= - 20" 4810 0.7 2 I 36 T = 1905 Okt. 18.0347 M. Z. Berlin 21 I5 0 28 21 1.0 71517 Marz I 21 10.4 w = 158"39'56!'1 O 59 70924 21 16.4 a. = 342 18 2.8 I 1907.0 9 15 0 42 70378 '7 I4 59 38 21 19.0 69901 z= 4 16 9.7 I logg = 0.523556 25 57 40 21 18.0 695'8 April 2 I4 55 21 -21 13.7 0.692 5 I x = [9.999872]rsin(v+ 231" 0'41!'2) Berechnet man die Helligkeit nach der Formel y = [9.947856] rsin (v + 140 20 10.2) z = [9.665076] rsin (2) + 143 29 56.8) Mittels desselben werden die vier Orter im Sinne welche bei der groDen Periheldistanz des Kometen nahe Beob. - Rechn. wie folgt dargestellt: zutreffen durfte, so ist dieselbe :