Circular No. 3664 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 HARTLEY (1982b) The following precise positions have been reported: 1982 UT R. A. (1950) Decl. Observer Feb. 7.75149 12 34 58.33 - 7 40 08.4 Russell 8.38015 12 36 45.45 - 7 57 36.6 McCrosky K. S. Russell (Siding Spring). U.K. 1.2-m Schmidt telescope. Short tail detected (also for IAUC 3663 observations). R. E. McCrosky (Oak Ridge Observatory). 1.5-m reflector. Identification uncertain. Plate black; full moon. The following parabolic and representative elliptical orbits have been determined for this comet by the undersigned. The orbital eccentricity is very uncertain, but it seems likely that the comet is a short-period one. The ephemeris is from the ellipse. T = 1982 Mar. 26.621 1982 Apr. 2.256 ET Peri. = 245.553 254.275 Node = 314.002 308.448 1950.0 Incl. = 3.770 2.922 q = 1.28853 1.17870 AU e = 1.0 0.59 (assumed) 1982 ET R. A. (1950) Decl. Delta r m1 Feb. 10 12 41.44 - 8 42.1 0.473 1.328 14.1 15 12 56.56 -11 06.3 20 13 12.83 -13 39.4 0.403 1.279 13.6 25 13 30.37 -16 19.8 Mar. 2 13 49.28 -19 05.0 0.350 1.238 13.1 COMET HARTLEY (1982c) K. S. Russell, U.K. Schmidt Telescope Unit, also provides the following additional precise position for this comet, which, 1ike comet 1982b, exhibits evidence of a short tail: 1982 UT R. A. (1950) Decl. Feb. 7.75149 12 37 42.97 - 7 58 15.8 Computations by the undersigned indicate that the orbit of this comet is very similar to that of comet 1982b. 1982 February 11 (3664) Brian G. Marsden
Our Web policy. Index to the CBAT/MPC/ICQ pages.