Central Bureau for Astronomical Telegrams
IAUC 4420: NSV 6708; 1987h
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 4421
Circular No. 4420
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
NSV 6708
Provisional photometry by R. H. McNaught, Siding Spring
Observatory, with the Australian National University 0.61-m reflector
(0.41-m reflector on Apr. 20): Mar. 22.76 UT, V = 7.27, U-B =
+0.21, B-V = +0.54, V-R = +0.40:, V-I = +0.69:; Apr. 19.60, 7.14,
+0.23, +0.53, +0.35:, +0.66:; Apr. 20.66, 7.16:, -, +0.56:, -, -;
Apr. 21.63, 7.22, +0.22, +0.60, +0.36, +0.55; May 4.77, 7.28,
+0.24, +0.55, +0.34, +0.65; May 8.76, 7.31:, +0.23:, +0.63:,
+0.38:, +0.73:. Visual magnitude estimates: July 14.39, 8.5
(McNaught); 14.56, 8.7 (P. Williams, Heathcote, N.S.W.); 15.67, 9.3
(McNaught); 16.43, 9.8 (D. A. J. Seargent, The Entrance, N.S.W.);
16.49, 10.1 (McNaught).
PERIODIC COMET HOWELL (1987h)
Ephemeris continuation from IAUC 4335:
1987/88 ET R. A. (1950) Decl. Delta r m1
July 24 1 09.48 - 1 03.1 1.337 1.868 12.7
Aug. 3 1 17.35 - 0 45.8
13 1 21.85 - 0 47.3 1.247 1.963 12.9
23 1 22.77 - 1 06.7
Sept. 2 1 20.10 - 1 41.3 1.190 2.065 13.1
12 1 14.22 - 2 25.6
22 1 05.93 - 3 13.0 1.197 2.173 13.4
Oct. 2 0 56.42 - 3 55.2
12 0 47.06 - 4 25.1 1.297 2.283 13.9
22 0 39.06 - 4 38.2
Nov. 1 0 33.26 - 4 32.9 1.497 2.394 14.6
11 0 30.05 - 4 10.1
21 0 29.46 - 3 32.1 1.779 2.506 15.2
Dec. 1 0 31.32 - 2 41.3
11 0 35.32 - 1 40.6 2.119 2.618 15.9
21 0 41.14 - 0 32.1
31 0 48.49 + 0 42.2 2.491 2.728 16.5
Jan. 10 0 57.08 + 2 00.5
20 1 06.69 + 3 21.6 2.872 2.837 17.1
30 1 17.14 + 4 44.2
Feb. 9 1 28.26 + 6 07.2 3.243 2.943 17.6
19 1 39.93 + 7 29.8
29 1 52.04 + 8 51.1 3.586 3.047 18.0
1987 July 16 (4420) Daniel W. E. Green
Read IAUC 4421
Our Web policy. Index to the CBAT/MPC/ICQ pages.
