Central Bureau for Astronomical Telegrams
IAUC 3819: 1983e
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Read IAUC 3820
Circular No. 3819
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 617-864-5758
COMET SUGANO-SAIGUSA-FUJIKAWA (1983e)
Total visual magnitude estimates: May 12.08 UT, 7.9 (J. D.
Shanklin, Cambridge, England, 20 x 80 binoculars); 13.08, 7.6
(Shanklin); 14.32, 8.2 (J. E. Bortle, Stormville, NY, 0.32-m
reflector; 20' tail in p.a. 310); 15.10, 8.8 (Shanklin); 16.07, 8.9
(Shanklin); 17.08, 8.9 (Shanklin); 18.32, 8.4 (Bortle; 12' tail in
p.a. 295); 19.31, 8.0 (C. S. Morris, Harvard, MA, 20 x 80
binoculars); 22.06, 8.3 (J.-C. Merlin, Le Creusot, France, 0.26-m
reflector); 23.09, 8.7 (Merlin); 23.42, 9.5 (Y. Sheffer, Laramie,
WY, 0.20-m reflector); 24.42, 9.0 (Sheffer).
Further precise positions have been reported as follows:
1983 UT R.A. (1950.0) Decl. Observer
May 9.76424 1 31 03.4 +39 41 22 Ishiyama
23.42535 0 55 17.37 +41 09 09.4 Everhart
26.41181 0 47 04.83 +41 05 26.2 "
29.29516 0 37 48.3 +40 54 13 McCrosky
29.42308 0 37 20.8 +40 53 31 Everhart
N. Ishiyama (JCPM Tone Station). Long. 140deg15'14" east, Lat.
35deg51'45" north. From Japan Astron. Circ. No. 372.
E. Everhart (Chamberlin Observatory field station). Full moonlight
on May 26. Comet large, faint and uncondensed on May 29.
R. E. McCrosky and C.-Y. Shao (Oak Ridge Observatory). 0.40-m
astrograph. Comet large and diffuse, measurement uncertain.
The following improved parabolic orbital elements have been
determined by the undersigned from 27 observations May 9-29. A
general solution (with perturbations) yields e = 0.9999 +/- 0.0004.
The maximum uncertainty in the ephemeris is now estimated as < 5'.
T = 1983 May 1.3307 ET Peri. = 82.1695
Node = 82.3461 1950.0
q = 0.471127 AU Incl. = 96.6270
1983 ET R.A. (1950.0) Decl. p r m1
June 3 0 15.44 +40 07.1 0.296 0.893 8.4
4 0 08.35 +39 47.6
5 23 59.78 +39 21.3 0.239 0.928 8.1
6 23 49.17 +38 44.8
7 23 35.67 +37 52.0 0.183 0.964 7.7
8 23 17.98 +36 31.8
1983 June 1 (3819) Brian G. Marsden
Read IAUC 3820
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