Central Bureau for Astronomical Telegrams
IAUC 3977: 1984l; 1984j; N Vul 1984; SS Cyg
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Read IAUC 3978
Circular No. 3977
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 GEHRELS 3 (1984l)
J. Gibson reports his recovery of this comet on exposures
with the 1.2-m Schmidt at Palomar as shown below. The images are
stellar within the limitations of seeing and guiding.
1984 UT R.A. (1950.0) Decl. m2
Aug. 7.45975 5 12 24.04 +22 56 23.8 20
8.45489 5 13 32.65 +22 57 31.7 20-20.5
The following orbital elements have been derived by the
undersigned from 34 observations 1975-1984 with full perturbations:
T = 1985 June 3.3883 ET Epoch = 1985 May 15.0 ET
Peri. = 231.3037 e = 0.149292
Node = 242.4493 1950.0 a = 4.046316 AU
Incl. = 1.0998 n = 0.1210917
q = 3.442235 AU P = 8.139 years
PERIODIC COMET TAKAMIZAWA (1984j)
Total visual magnitude estimates: Aug. 8.83 UT, 9.5 (R. H.
McNaught, Siding Spring Observatory, 20 x 120 binoculars); 18.19,
10.0 (J. Bortle, Stormville, NY, 0.32-m reflector); 19.11, 10.1
(Bortle); 21.29, 10.4 (C. S. Morris, Whitaker Peak, CA, 0.25-m
reflector). An exposure by J. Gibson with the 1.2-m Palomar Schmidt
on Aug. 21.44 UT shows a jet ~ 9" long in p.a. 80-85.
NOVA VULPECULAE 1984
Further recent visual magnitude estimates: Aug. 16.14 UT, 8.5
(P. Maley, Houston, TX); 16.87, 8.6 (A. Perez, Paris, France);
17.50, 8.5 (K. Watanabe, Sapporo, Japan); 17.87, 8.6 (Perez);
18.18, 8.4 (R. Dixon, Hermon, NY); 18.49, 7.5 (Watanabe); 18.85,
7.4 (Perez); 19.10, 7.3 (D. Weier, Madison, WI); 19.50, 7.4 (
Watanabe); 19.89, 7.9 (Perez); 20.50, 7.4 (Watanabe); 21.06, 7.8 (J.
Bortle, Stormville, NY); 22.12, 7.8 (Maley); 23.05, 8.2 (Bortle).
SS CYGNI
Further recent visual magnitude estimates: Aug. 12.24 UT, 10.0
(A. P. Abbott, Leduc, AB); 13.21, 10.2 (C. Hurless, Lima, OH);
14.18, 11.0 (Hurless); 21.22, 11.8 (C. Spratt, Victoria, BC).
1984 August 24 (3977) Brian G. Marsden
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