The Capitol, in the City of WASHINGTON, in the District of Columbia. The phases of the Eclipse at the following places were not strictly computed (which was consideredun necessary), but were estimated from the preceding. It is believed, however, that they will be found by observation to be very near approximations to the truth. The above are expressed in mean time of the respective places. Monday and Tuesday, December 15th and 16th, the Moon eclipsed, visible throughout the United States. Occultations of the Planets and of Stars of not less than the fourth magnitude visible in Boston, in the year 1834, in Mean Time of the Meridian of Boston. Thursday, January 23d. Immersion Immersion Emersion Oh. 8.0m. M. 13' 26" South of D's D's S. D. at Im. 16' 11.0"; at Em. 16' 10.2. Thursday, July 31st. Occultation of a 8. 1h. 55 8m. M. 9 46 4' 9" South of the D's S. D. at Im. 15' 11.4"; at Em. 15' 14,2". Mean time at the respective places. Digits eclipsed 8° 10′. Monday, September 8th. Occultation of ß m. 8h. 57 9m. A. 0' 45" North of the Centre. Immersion D's S. D. at Im. 16' 32". Wednesday, September 24th. Occultation of the Planet Jupiter. Immersion of 's Centre 6h. 25 2m. M. 7 8 2 13' 34" South of the D's S. D. at Im. 15' 9.4"; at Em. 15' 8.7". Mars. 3 South of the Moon. In Canada, the Northern extremities of Maine, New Hampshire, Vermont, New York, and Michigan, the planet will be eclipsed.. Tuesday, December 2d, at 2h. 5' A. Nearest approach of the Moon to Venus, 9' north of the D. In the Southern States the planet will be eclipsed. ECLIPSES OF THE SATELLITES OF JUPITER IN 1834, Visible throughout, or in some part of, the United States, in Mean Time for the Meridian of Greenwich, reckoned according to the manner of Astronomers, who begin the day at the noon of the civil day and count the hours up to 24, or to the succeeding noon, when another day is commenced. 1834.] POSITION AND MAGNITUDE of the rings of saturn. 19 Position and Magnitude of the Rings of Saturn, according to Bessel and Struve, for every fortieth day in the year. p. Angle of the semiconjugate axis of the ring with the circle of declination, positive when east, negative when west. 1. Angle of elevation of the Earth above the plane of the rings, as seen from Saturn, positive when north, negative when south. a. Semitransverse axis of the rings. b. Semiconjugate axis of the rings; positive when their northern surface is visible, negative when their southern. u. Longitude of the Earth as seen from Saturn, reckoned on the plane of the rings and from their ascending node in the equator. u'. The same longitude reckoned from their ascending node in the ecliptic. * **It has been recently discovered, that Saturn is not placed exactly in the centre of the rings. This singular circumstance was for some time considered an optical illusion, occasioned by the shadow of the planet on the ring; but Professor Struve has ascertained, with the celebrated Dorpat telescope, that the rings are actually eccentric. The eccentricity is, however, too small to be perceived by any other than the very best and most powerful telescopes. ASPECTS OF THE PLANETS IN 1834. The inferior planets (Mercury and Venus), from their superior to their inferior conjunctions, and the superior planets, from their oppositions to their conjunctions, pass the meridian between noon and midnight and usually set in the evening after the Sun. The inferior planets, from their inferior to their superior conjunctions, and the others, from their conjunctions to their oppositions, pass the meridian between midnight and noon, and usually rise before the Sun in the morning. |