Central Bureau for Astronomical Telegrams
IAUC 3826: 1983e
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Read IAUC 3827
Circular No. 3826
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)
Further precise positions have been reported as follows:
1983 UT R.A. (1950.0) Decl. Observer
June 6.46876 23 43 16.65 +38 22 23.7 Schweizer
7.44514 23 28 23.86 +37 20 18.9 Giclas
7.46043 23 28 08.78 +37 19 09.1 Schweizer
9.29265 22 45 20.0 +33 28 15 Schwartz
10.74576 21 46 39.16 +25 57 49.9 Gilmore
10.76218 21 45 44.68 +25 49 50.9 "
11.25391 21 18 14.0 +21 15 53 McCrosky
11.29142 21 15 56.4 +20 50 59 "
11.60836 20 55 33.10 +17 07 20.7 Gilmore
11.61924 20 54 49.10 +16 58 56.6 "
F. Schweizer (Palomar Observatory). 1.2-m Schmidt telescope.
Time changed by -5 min on June 6. Measurer: J. Gibson.
H. L. Giclas (Lowell Observatory, Anderson Mesa Station). Very
diffuse and uncertain. Measurer: E. Bowell.
G. Schwartz and R. E. McCrosky (Oak Ridge Observatory). 1.5-m
reflector. Measurer: McCrosky. Very uncertain on June 11.
A. C. Gilmore (Mount John University Observatory). 0.6-m reflector.
Measurer: P. M. Kilmartin. Inkdot measured on June 10.
The following parabolic orbital elements have been determined
(with perturbations included) by the undersigned from 37
observations May 9-June 11:
Epoch 1983 June 12.0 ET
T = 1983 May 1.3283 ET Peri. = 82.1659
Node = 82.3426 1950.0
q = 0.471083 AU Incl. = 96.6219
R. H. McNaught, Royal Greenwich Observatory, remarks that the
closest approach of the earth to the comet's orbit occurs on June
14.7 UT, when the earth will pass 0.048 AU inside the comet's
orbit, 2.9 days after the comet has passed this point. Meteors are
possible from R.A. = +21deg, Decl. = +42deg (equinox 1950.0), with
V = 53 km/s. A similar prediction is given by I. Hasegawa on YC 1995.
Visual estimates of total magnitude and coma diameter: June
9.22 UT, 7.4,~ 18' (D. W. E. Green, Harvard, MA, 20 x 80 binoculars);
10.97, 7.0, 30' (J.-C. Merlin, Le Creusot, France, 7 x 50
binoculars); 12.08, 6.6, - (Merlin).
1983 June 13 (3826) Brian G. Marsden
Read IAUC 3827
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