Central Bureau for Astronomical Telegrams
IAUC 3941: 1983v; Poss. Occn BY SATURNIAN MAGNETOSPHERIC RING; Z And
The following International Astronomical Union Circular may be linked-to from your own Web pages, but must not otherwise be redistributed (see these notes on the conditions under which circulars are made available on our WWW site).
Read IAUC 3942
Circular No. 3941
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
TWX 710-320-6842 ASTROGRAM CAM Telephone 617-495-7244/7440/7444
PERIODIC COMET HARTLEY-IRAS (1983v)
Ephemeris from the elements on MPC 8672:
1984 ET R.A. (1950.0) Decl. p r m1
Apr. 10 19 34.9 +71 00.8 1.635 1.777 10.1
20 17 44.5 +77 42.5
30 14 34.6 +77 49.4 1.718 1.954 10.6
May 10 12 46.2 +71 40.5
20 12 05.41 +64 10.0 1.957 2.138 11.3
30 11 49.24 +57 00.3
June 9 11 43.40 +50 35.1 2.314 2.325 12.0
19 11 42.67 +44 57.1
29 11 44.82 +40 01.9 2.731 2.512 12.7
July 9 11 48.73 +35 43.3
19 11 53.76 +31 55.8 3.157 2.698 13.3
29 11 59.54 +28 34.0
Aug. 8 12 05.83 +25 33.8 3.557 2.881 13.9
18 12 12.42 +22 51.9
28 12 19.21 +20 25.5 3.902 3.062 14.3
Total visual magnitude estimate by C. E. Spratt, Victoria, BC
(0.20-m reflector): Apr. 22.21 UT, 10.2.
POSSIBLE OCCULTATION BY SATURNIAN MAGNETOSPHERIC RING
J. C. Bhattacharyya, Indian Institute of Astrophysics, Bangalore,
reports that observations by Santhanam and Rozario with the
1-m telescope at Kavalur indicate systematic extinction of SAO
158913 on March 24 and 25, apparently in accordance with the
prediction by Mink (1983, A.J. 88, 559) of occultations of the star
by the supposed magnetospheric ring at 14 radii from the center of
Saturn. Observations on Mar. 24 in integrated light showed two
prominent and several smaller and narrow absorbing features beween
20h14m and 20h20m UT, the maximum extinction being 0.58 mag.
Observations on Mar. 25 using a B filter showed similar structures
between 20h18m and 20h24m with a maximum extinction of 0.28 mag.
Z ANDROMEDAE
Visual magnitudes: Mar. 30.5 UT, 9.8 (J. Morgan, Prescott,
AZ); Apr. 2.4, 9.7 (J. Bortle, Stormville, NY); 9.4, 9.7 (Bortle).
1984 April 25 (3941) Brian G. Marsden
Read IAUC 3942
Our Web policy. Index to the CBAT/MPC/ICQ pages.
