No coin nor oath required. For personal study only.
145 138 J'ai l'honneur de Vous envoyer nos deux premieres observations complbtes de la planete (173), dBcouverte recemment par M. Borrelly. L a plankte a Bti: vue le ler ti 10 heures du soir; mais il n'a pas ete possible d'en continuer l'observation ce jour 1ti ; la premiere position precise se rapporte au 2.
The following comparisons of magnitudes were made Oct. 21. Japetus fainter by & mag. thaI; Thethys, Nov. 29. Japetus is about 4 mag. brigther than Dione.
Dec. 1. At a distance of 14" Japetus steadily seen and estimated to be of the 14th magnitude. Dec. 5. Japetus fainter than Rhea, and $ mag. brigther than Dione. Japetus belongs to the fainter satellites, and is not brighter, I think, than Enkeladus.
On Oct. 13. in very fine seeing, Mimas was esti-when Japetus was near its conjunctions.
which is near Japetus.
La planbte est de 10. grandeur.
J e Vous transmets Bgalement celles de nos observations des trois planbtes prkddentes qui n'ont pas encore BtB publiBes.
Marseille, le 4. Aoilt 1877.
Stephan . mated to be as bright, and perhaps brighter, than Enkeladus at 9h 15m.
In reducing the observations the value of one revolution of the micrometer screw was assumed to be 9"948. No corrections for refraction have been applied to the preceding observations or to those published in the Astronomische Nachrichten No. 2076. The observations were made by myself. I am again very much indebted to Mr. Marth for his very complete ephemerides of these satellites given in this journal Nos. 2098-2100. 1876. Dec, 26. A. Hall. 4 % ' (P e r r o t i n -Toulouse). v Dat. Log. f. p. r de T. M, de Mars. A.R. app. P. app. 'en A.R. en H.P.-5% de Comp. Observateur. 1877 Janv, 20 I 9%8m 0 s 1 8113lm44s78 1 72"15' 12"1 I -T.450 -0.6282 I
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