Central Bureau for Astronomical Telegrams
IAUC 5050: 1990 MF
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Read IAUC 5051
Circular No. 5050
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
Observations made subsequent to June 29:
1990 UT R.A. (1950) Decl. Observer
July 1.35799 16 18 59.75 +13 33 00.3 Gilmore
1.38681 16 18 56.66 +13 38 21.8 "
3.07691 16 17 04.58 +19 26 00.9 McCrosky
3.09450 16 17 02.25 +19 30 08.7 "
A. C. Gilmore and P. M. Kilmartin (Mount John Observatory).
R. E. McCrosky and C.-Y. Shao (Oak Ridge Observatory).
The following orbital elements, by J. F. Chandler, Center for
Astrophysics, are from optical observations June 22-July 3 and highly
precise radar data obtained by S. Ostro at Arecibo Ionospheric Observatory
on July 4 and 5. In attempting to represent the optical data, it should
be noted that these elements are offset to the FK5 equinox:
Epoch = 1990 June 18.0 ET
T = 1990 Aug. 9.2824 ET Peri. = 112.7385
e = 0.456068 Node = 210.9790 1950.0
q = 0.950103 AU Incl. = 1.8705
a = 1.746730 AU n = 0.4269385 P = 2.309 years
1990 ET R.A. (1950) Decl. Delta r V
July 8 16 06.55 +47 08.1 0.035 1.023 13.6
9 16 01.63 +55 00.0
10 15 53.67 +63 21.4 0.033 1.015 13.9
11 15 38.6 +71 50.9
12 15 00.4 +79 58.6 0.034 1.007 14.3
13 11 52 +86 10.3
14 6 28.9 +83 15.2 0.037 0.999 14.8
15 5 27.2 +77 22.0
16 5 07.2 +71 57.2 0.042 0.992 15.3
17 4 57.60 +67 12.5
18 4 52.13 +63 05.6 0.049 0.986 15.7
19 4 48.68 +59 31.8
20 4 46.39 +56 26.4 0.057 0.980 16.1
21 4 44.83 +53 44.9
22 4 43.75 +51 23.5 0.066 0.975 16.4
1990 July 6 (5050) Brian G. Marsden
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