Central Bureau for Astronomical Telegrams
IAUC 5041: 1990 MF
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Circular No. 5041
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
1990 MF
E. F. Helin reports her discovery of a fast-moving asteroidal
object on films exposed by Helin, B. Roman, K. Lawrence, and
J. Michaud with the 0.46-m Schmidt telescope at Palomar.
Measurements by Roman:
1990 UT R.A. (1950) Decl. Mag.
June 26.24809 16 23 11.09 + 2 03 35.2 15.2
26.27535 16 23 08.81 + 2 06 15.1
27.21372 16 22 28.97 + 3 43 02.8 15.0
27.37101 16 22 15.64 + 4 00 18.1
The following preliminary orbital elements are very
uncertain but indicate that this is an Apollo-type object:
T = 1990 Aug. 8.84 ET Peri. = 117.99
e = 0.4752 Node = 205.61 1950.0
q = 0.9475 AU Incl. = 1.80
a = 1.8055 AU n = 0.40627 P = 2.43 years
1990 ET R.A. (1950) Decl. Delta r V
June 18 16 28.68 - 7 05.3 0.120 1.127 15.1
20 16 27.43 - 5 26.4
22 16 26.14 - 3 29.7 0.099 1.103 14.8
24 16 24.79 - 1 10.0
26 16 23.37 + 1 40.6 0.080 1.081 14.4
28 16 21.85 + 5 13.7
30 16 20.16 + 9 46.6 0.061 1.060 14.1
July 2 16 18.17 +15 45.4
4 16 15.58 +23 48.4 0.045 1.040 13.7
6 16 11.76 +34 45.2
8 16 04.96 +49 14.0 0.034 1.022 13.8
9 15 58.85 +57 40.9
10 15 48.21 +66 35.5 0.032 1.013 14.3
11 15 25.2 +75 29.3
12 14 04.9 +83 33.3 0.034 1.005 15.1
13 7 55 +85 26.2
14 5 42.9 +79 26.2 0.038 0.998 16.0
15 5 12.7 +73 25.8
16 5 00.16 +68 09.1 0.044 0.990 16.9
1990 June 27 (5041) Daniel W. E. Green
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