7 July 8. The R.A. of star (b) has been assumed to be 10m 2985 less than that of Groombridge 1396. It is too faint to be observed with the transit-circle. NOTES TO COGGIA'S COMET, 1874, JULY 8. Remarks by Mr. Main. The nucleus, as observed with the Heliometer, has a circular planetary disc of considerable brightness (but with the 10-ft. telescope it appeared to me to be stellar), and above it in the field the envelope forms a sector of about 120°, this part being distinctly brighter than the parts of the coma radiating below it on each side: the diameter of the nucleus is probably about 10", and that of the envelope above it from 30" to 40"; the coma streams downward in the field in a strictly parabolic shape, leaving a dark interval in the centre-a star of about the 9'0 magnitude is seen in the right branch of it without diminution of light; the axis of the comet downwards makes an angle of about 12° with the declination-wire towards the apparent right of the field; the nucleus has the appearance of matter flowing out from it towards the envelope upwards, but is certainly not so well-defined on that side as on the other. Remarks by Mr. F. Bellamy. Almost surrounding the nucleus I noticed a circular band of nebulous matter of great brilliancy, having a well-defined limit, the space which was free from it being below the nucleus in the field, and forming an angle of about 15° with the two streamers; it resembled a miniature lunar corona not quite perfect. Both the streamers had, on two previous nights, an apparent inclination towards the right of the field in a curved direction, this I did not observe to-night; the left streamer was at first of less brightness than the other, but is now quite equal to it, and perhaps surpasses it. OBSERVATIONS OF OCCULTATIONS OF STARS BY THE MOON (WITH THE EQUATIONS DEDUCED FROM THE OCCULTATIONS); AND OF THE SOLAR ECLIPSE OF OCT. 9-10; AND OF PHENOMENA OF JUPITER'S SATELLITES: MADE AT THE RADCLIFFE OBSERVATORY, OXFORD, IN THE YEAR 1874. 248 Occultations, & Calculation of Occultations of Stars by the Moon, Jan. 25. The disappearance instantaneous: the observation good. 26. A1 Tauri, the disappearance instantaneous. A2 Tauri, thin cloud; the star faint. 27, 30, and March 26. The disappearances instantaneous: the observations good. Apr. 22. The disappearances instantaneous: the observations good. (K.) The observation very good. (M.) Oct. 9. The beginning took place some seconds earlier than the time recorded, as the eye was not turned to the exact spot. The time for the end is very exact, though a cloud came at the very instant. (M.) Oct. 9. The beginning probably late: the end good. Cloudy at both phases. (K.) The sun well-defined and steady; the first contact seen distinctly. At 11h 12m 50% the last contact had not taken place, when a thick cloud obscured the sun till Dec. 16. 11h 13m 5", at which time I feel sure I just saw the end of the phenomenon. (F.B.) The observation uncertain; passing clouds. 22. Both observers: the disappearance instantaneous. 19. The disappearence instantaneous. (K.) For an instant just before disappearing the star became blurred, and then vanished instantaneously. (F.B.) Sidereal Chronometer 2 7 12'0 Heliometer Clock 23 13 570 Sidereal Chronometer 23 16 6.5 Journeyman Clock 5 1 53'2 Heliometer Clock 5 ° 57'5 2 6 14'0 2 6 21.00 12 I 22.2 23 15 8.1 23 14 55'70 23 15 8.6 23 14 56 205 34 10'1 5 2 11.6 5 I 57'73 8 27.6 ... 5 2.12.2 5 I 58.33 |