14 
SIR J. E. W. HERSCHEL’S CATALOGUE 
Notes on the Catalogue. 
No. 
12 h. '6. D’Arrest says, “ h. II. positio certe erronea,” but gives no indication of the 
correction required in R.A. or P.D. 
29 h. 13; II. 241=11. 243. In P.T. the determining # is omitted, and in the state- 
ment of the places of these nebulse, as well as of II. 239, 240, 242, and III. 199, 
there is much confusion, for the correction of which see the list of errata sub- 
joined. Auwers has threaded the intricacies of this maze with singular felicity, 
but has been misled in the case of II. 243 into assigning to it a totally erro- 
neous place (22 h 48 m R.A., 73° 37' P.D. 1830), and, in consequence, has not per- 
ceived its identity with II. 241. 
78 II. 3. Auwers makes the P.D. of this neb. (1830)= 99° 32', from P.T., which 
places it 2°+ n of 17 Ceti. C.H. makes it 1° 51' n of the same star, or for 1830, 
99° 42'. In fact H. has two observations of it, neither of them more than eye- 
drafts with neighbouring stars, and the P.D. is concluded graphically by C.H. 
from these diagrams. 
88 III. 876. The P.D. of Auwers (81° 16') is 1° wrong. The place given in P.T. is 
1° 43' n of 51 Piscium ; so also in Register (H. 2296). 
119 Auw. N. 4=D’Arr. 6. The place given is that brought up from D’ Arrest’s obser- 
vations, the RA. being set down only roughly in Auw. 
132 h. 57= V. 20. Once looked for by Lord Rosse and not seen. Having been 
observed both by H. and h., there can be no doubt of its existence. 
138 h. 61=h. 2345=Y. 1. In h.’s sweep 733 the position reading is set down as 
324 0, 5. This is in contradiction with a diagram made at the time, and is an 
obvious mistake for 2 34 0, 5, which =180° + 54 o, 5, agreeing well with the dia- 
gram and with 2 obs. of W.H., in both of which it is described as “ nf to sp.” 
There is also an erratum in the C.G.H. Catal., for 143 0, 8 read 144°-5, since 
324-5— 180=144-5. 
145 h. 64=11. 621=11. 703. Auwers remarks that A Ceti, the determining star of 
W.H., does not exist; but C.H. has perceived this, and by using another deter- 
mining star (13 Ceti, sw. 756, W.H.), has fixed the place of the nebula II. 703 
for 1800 at R.A. 0 h 37 m 47 s , P.D. 93° 53' (=93° 43', 1830), thereby identifying 
it with II. 621. Auwers, using a conjectural star, sets down the P.D. erro- 
neously as 92° 52' (1830). 
165 h. 2356. This*is the main body of the nubecula minor. 
169 h. 2359. A complex object with several nuclei. There is an erratum in the R.A. 
set down in C.G.H. as resulting from sw. 488, for 46 m 12 S T read 47 m 12 s, l. 
177 79, «, h. In Lord Rosse’s diagram, a=h. 79, j3=h. 78, y=nova, accidentally 
omitted in the body of the Catalogue, but inserted as No. 5058 at the end. 
The whole Catalogue having been finally numbered before the omission was 
detected, it could not be inserted in its place. S is a star; s=h. 79, a. 
