Circular No. 5266 Central Bureau for Astronomical Telegrams INTERNATIONAL ASTRONOMICAL UNION Postal Address: Central Bureau for Astronomical Telegrams Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A. Telephone 617-495-7244/7440/7444 (for emergency use only) TWX 710-320-6842 ASTROGRAM CAM EASYLINK 62794505 MARSDEN or GREEN@CFA.BITNET MARSDEN or GREEN@CFAPS2.SPAN 1991 JW K. Lawrence and E. Helin report their discovery of a fast- moving asteroidal object on films obtained this past week by them and P. Rose with the 0.46-m Schmidt telescope at Palomar. B. G. Marsden, Center for Astrophysics, identifies the object with one found by C. Shoemaker on single-night films obtained with the same telescope in April in collaboration with E. Shoemaker and D. Levy. 1991 UT R.A. (1950) Decl. Mag. Observer Apr. 19.39670 14 10 48.04 +18 53 04.9 17 Shoemaker 19.42865 14 10 39.94 +18 52 40.9 " May 8.24826 12 49 56.97 +10 05 51.9 17.0 Lawrence 9.22795 12 45 59.83 + 9 24 29.0 " 9.25226 12 45 53.26 + 9 23 24.4 " 10.23576 12 42 00.03 + 8 40 55.3 " 10.26146 12 41 53.43 + 8 39 46.4 " 12.25295 12 34 17.32 + 7 11 20.9 " 12.28056 12 34 10.62 + 7 10 03.8 " Orbital elements from the above observations: T = 1991 Sept.16.803 ET Peri. = 301.844 e = 0.11808 Node = 53.524 1950.0 q = 0.91530 AU Incl. = 8.691 a = 1.03785 AU n = 0.932187 P = 1.06 years 1991 ET R.A. (1950) Decl. Delta r V May 4 13 07.93 +12 53.6 0.135 1.119 16.3 9 12 46.91 + 9 34.6 14 12 27.98 + 5 52.2 0.135 1.105 16.5 19 12 11.73 + 1 58.1 24 11 58.31 - 1 57.9 0.142 1.088 16.9 29 11 47.47 - 5 48.8 June 3 11 38.84 - 9 31.3 0.153 1.070 17.4 8 11 32.05 -13 04.1 13 11 26.76 -16 27.5 0.165 1.051 17.8 18 11 22.61 -19 42.4 23 11 19.21 -22 49.5 0.176 1.031 18.1 1991 May 13 (5266) Daniel W. E. Green
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