Central Bureau for Astronomical Telegrams
IAUC 4084: 1985f; 1985L
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Read IAUC 4085
Circular No. 4084
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 (1985f)
M. Hartley, U.K. Schmidt Telescope Unit, provides the
following additional precise position:
1985 UT R.A. (1950.0) Decl.
July 10.44414 12 31 06.33 -10 00 01.9
An orbit determination from the available positions (see also
IAUC 4079) shows the comet to be a short-period one:
T = 1985 June 11.621 ET
Peri. = 174.114 e = 0.51479
Node = 40.345 1950.0 a = 3.17528 AU
Incl. = 24.942 n = 0.174193
q = 1.54067 AU P = 5.66 years
1985 ET R.A. (1950.0) Decl. p r m1
July 14 12 37.95 -11 44.7 1.344 1.574 16.5
24 12 58.18 -16 24.7
Aug. 3 13 19.82 -20 43.0 1.530 1.625 16.9
13 13 42.86 -24 38.8
23 14 07.30 -28 11.7 1.736 1.695 17.3
Sept. 2 14 33.12 -31 21.0
12 15 00.23 -34 05.6 1.958 1.782 17.7
22 15 28.55 -36 25.3
Oct. 2 15 57.87 -38 19.2 2.193 1.879 18.1
12 16 27.94 -39 47.2
22 16 58.46 -40 49.6 2.434 1.985 18.4
Nov. 1 17 29.08 -41 27.1
11 17 59.43 -41 41.2 2.677 2.096 18.8
21 18 29.21 -41 33.7
Dec. 1 18 58.13 -41 06.8 2.911 2.211 19.1
SUPERNOVA 1985L IN NGC 5033
The following precise position has been measured by J. E.
Sinclair from an exposure made on July 16 with the astrographic
telescope at the Royal Greenwich Observatory: R.A. = 13h11m03s48, Decl. =
+36deg52'25"6 (equinox 1950.0). The offset from the nucleus of the
galaxy is 70" west, 55" north.
Visual magnitude estimates by M. Verdenet, Bourbon-Lancy,
France: July 1, 12.8; 2, 13.2; 6, 13.2; 7, 13.3; 8, 13.3.
1985 July 18 (4084) Brian G. Marsden
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