1993 FW
Abstract
J. Luu, University of California at Berkeley; and D. Jewitt, University of Hawaii, report the discovery of a second very faint object with very slow (3"/hr) retrograde opposition motion. The object was detected in CCD images obtained with the University of Hawaii's 2.2-m telescope at Mauna Kea. The object appears stellar in 0".8 seeing, with an apparent Mould magnitude R = 22.8 +/- 0.1 measured in a 1".6-radius aperture. The color V-R = +0.4 +/- 0.1. 1993 UT R.A. (2000) Decl. Mar. 28.41684 12 27 06.31 - 3 00 12.7 28.59830 12 27 05.52 - 3 00 07.0 29.41934 12 27 01.90 - 2 59 42.2 29.42846 12 27 01.85 - 2 59 41.8 Computations by B. G. Marsden indicate that 1993 FW is currently between 38 and 56 AU from the earth. Similarity in motion and brightness to 1992 QB1 suggests that 1993 FW is another Kuiper Belt candidate, and the orbit selected below is again the direct circle. The object's phase angle reached a minimum of 0.002 deg on Mar. 28.0 UT. Epoch = 1993 Mar. 14.0 TT Arg.lat. = 359.468 Node = 187.896 2000.0 a = 42.451 AU Incl. = 8.029 1993 TT R. A. (2000) Decl. Delta r Elong. Phase V Mar. 24 12 27.43 - 3 02.4 41.456 42.451 176.0 0.1 23.2 Apr. 3 12 26.70 - 2 57.4 41.457 42.451 174.0 0.1 23.2 13 12 25.98 - 2 52.4 41.487 42.451 163.9 0.4 23.2 23 12 25.30 - 2 47.7 41.545 42.451 154.0 0.6 23.2 May 3 12 24.70 - 2 43.5 41.631 42.451 144.1 0.8 23.3
- Publication:
-
International Astronomical Union Circular
- Pub Date:
- March 1993
- Bibcode:
- 1993IAUC.5730....1L