OCCULTATIONS.

Elements for facilitating the calculation of Occultations which may be visible in the United States, in 1848.

Washington,

Observatory. Mean Time of ap. conj. in R. A. of Moon and Star.

h. m. S.

h. m. S.

9 27 53 M. 15 35 59.72 16 19 36.9 S. 59 10 S. 74 N.33 N.

1 0 32.94 4 50 40.0 N. 25 15
5 38 35.89 17 39 55.9

7 3 54 A.
5 30 58
4.5 7 31 56 M. 7 9
4 0 11 32 M. 9 33
6 8 37 50 A. 10 15
5.6 0 7 26 M. 11 9

61

10 S.

41 46

90

24 N.

4.5 1 53 14 M.

4.5 9 8 9 A. 15 35 34.52 15 11 0.2 S. 12 29 S. 39 N.21 S.

7 38 13 A. 7 9 21.35 16 48 27 2 N. 54 14 S. 90 N.33 N. 3 39 53 M. 15 35 34.65 15 10 59.8 S 16 14 43 N.17 S.

411 0 43 A.11 20 8.01 3 41 25.5 N. 8 49 S. 43 N.25 S. 15 51 50.62 16 4 48.2 S. 35 50

A. S. C. 2270

6 7 115

Oct. 5p

5 6 27 6 A. 19 12 53.42 18 7 24.3 S. 28 57 S. 53 N. 4 S.

10n H

5.6 6 16 6

23 40 10.76 3 36 1.4 68 51

2 34 21.59 10 8 45.7 N.56 17
5 38 37.54 17 40 0.4 30 2

191

23 Τ Ω

61 11 9 M.
4 4 50 49

28

4.5 4 38 7 A. 15 35 33.19 15 10 55.6 S. 37 25

Dec. 3. 82

7'85 Ceti

6 4 2 54 A. 22 54 41.45 7 22 53.2 S. 53 10 S. 83 N.19 N.

6 5 11 50

2 34 21.88 10 5 44.9 N. 51 11

90

17

1
64 31
5 38 38.76 17 39 58.8
4 38 39 M. 11 42 49.27 2 36 59.5

4.5 5 2 49

15 35 33.87 15 10 58.8 S. 41 59 4 4 53 59 A. 22 44 42.95 8 22 57.0

150 34

ECLIPSES OF THE SATELLITES OF JUPITER IN 1848. Visible in the United States, Mean Time at Washington Observatory.

A Table showing the Illuminated Portions of the Discs of Venus and Mars.

The numbers in this table are the versed sines of that portion of the Discs, which to an observer on the Earth, will appear to be illuminated, the apparent diameter of the planet at the time being considered as unity.

To a spectator on the Earth, Venus appears most brilliant when her elongation is about 45°, and she is approaching her inferior conjunction, or receding from it; in which positions she will not be this year. Mars is

most brilliant about the time of his opposition to the Sun, being then also nearest to the Earth, in which position he will not be this year.

Position and Magnitude of the Rings of Saturn, according to Bessel and Struve, for every fortieth day in the year, at 7 hours in the morning.

b

semi-conjugate axis of the rings, positive when their northern surface is visible, negative when their southern.

inclination of the northern semi-conjugate axis of the rings to the circle of declination; + when East,-when West. angle of elevation of the Earth above the plane of the rings' as seen from Saturn; + when North, - when South. angle of elevation of the Sun above the plane of the rings, as seen from Saturn; when North, when South. The Opposition will take place on the 14th of September.