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Circular No. 5531
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@CFA or GREEN@CFA (.SPAN, .BITNET or .HARVARD.EDU)
1992 KD
E. F. Helin reports the discovery of a fast-moving asteroidal
object by herself and K. Lawrence on films taken by Lawrence, P.
Rose, and J. Alu. The following measurements are by Rose:
1992 UT R.A. (2000) Decl. Mag.
May 27.24566 14 44 14.02 -18 45 47.7 15.5
27.26892 14 44 15.49 -18 43 39.0
28.21076 14 45 36.93 -17 20 44.8 15.5
28.33299 14 45 45.96 -17 10 02.5
29.29306 14 47 08.99 -15 46 39.6 16
29.37812 14 47 15.38 -15 39 17.1
Orbital elements from the above observations by G. V. Williams:
T = 1992 May 25.693 TT Peri. = 357.328
e = 0.26985 Node = 243.268 2000.0
q = 1.25410 AU Incl. = 22.690
a = 1.71760 AU n = 0.437844 P = 2.25 years
1992 TT R. A. (2000) Decl. Delta r Elong. Phase V
May 18 14 31.48 -32 30.4 0.257 1.256 159.9 16.1 14.9
23 14 38.27 -25 06.3 0.253 1.254 160.5 15.6 14.9
28 14 45.30 -17 38.8 0.257 1.254 157.2 18.2 15.0
June 2 14 52.55 -10 37.3 0.267 1.255 151.6 22.6 15.2
7 15 00.03 - 4 23.4 0.283 1.258 145.3 27.3 15.5
12 15 07.71 + 0 52.6 0.304 1.262 139.4 31.6 15.8
17 15 15.57 + 5 10.0 0.329 1.267 134.0 35.2 16.0
22 15 23.56 + 8 33.8 0.356 1.273 129.4 38.1 16.3
27 15 31.69 +11 10.7 0.387 1.280 125.4 40.4 16.6
COMET TANAKA-MACHHOLZ (1992d)
Total visual magnitude estimates (cf. IAUC 5524): May 17.93
UT, 8.3 (M. Lehky, Hradec Kralove, Czechoslovakia, 10x80 binocu-
lars); 18.90, 7.5 (A. Diepvens, Balen, Belgium, 0.15-m refractor);
20.09, 7.7 (J. E. Bortle, Stormville, NY, 20x80 binoculars); 26.94,
8.6 (J. D. Shanklin, Cambridge, England, 0.2-m refractor); 29.30,
8.0 (Bortle).
1992 May 30 (5531) Daniel W. E. Green