Circular No. 4107 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 COMET HARTLEY-GOOD (1985l) M. Hartley, U.K. Schmidt Telescope Unit, reports that he and Good have discovered a comet on a single objective-prism plate obtained with the 1.2-m Schmidt telescope: 1985 UT R.A. (1950.0) Decl. m1 Sept.11.69045 1 11 54 -27 30.2 12 The daily motion is ~ 48' east-west or west-east, and the image has an obvious tail. PERIODIC COMET MAURY (1985k) Further precise positions have been reported as follows: 1985 UT R.A. (1950.0) Decl. Observer Sept. 7.21417 21 42 33.24 - 4 57 29.5 Gibson 7.39583 21 42 30.59 - 4 59 14.3 " 8.12854 21 42 22.88 - 5 06 04.0 " 8.20062 21 42 21.94 - 5 06 44.2 " 12.08596 21 41 48.83 - 5 42 00.6 Schwartz 12.16787 21 41 48.22 - 5 42 42.7 Shao J. Gibson (Palomar). 1.5-m reflector and CCD. G. Schwartz and C.-Y. Shao (Oak Ridge). Measurer: Shao. Improved orbital elements from observations Aug. 16-Sept. 12: T = 1985 June 8.5692 ET Peri. = 114.2212 e = 0.528851 Node = 183.0602 1950.0 a = 4.273624 AU Incl. = 9.4263 n = 0.1115603 q = 2.013514 AU P = 8.835 years 1985 ET R.A. (1950.0) Decl. p r m1 Sept.22 21 41.93 - 7 03.0 Oct. 2 21 44.42 - 8 07.8 1.409 2.248 16.8 12 21 49.23 - 8 53.2 22 21 56.19 - 9 18.8 1.664 2.326 17.3 Nov. 1 22 04.97 - 9 25.6 11 22 15.26 - 9 15.5 1.967 2.411 17.8 21 22 26.78 - 8 50.4 Dec. 1 22 39.23 - 8 12.2 2.299 2.502 18.3 1985 September 13 (4107) Brian G. Marsden
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