Central Bureau for Astronomical Telegrams
IAUC 4807: 1989 NA
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Circular No. 4807
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
1989 NA
E. Helin reports her discovery of an asteroidal object with
direct motion. The following observations are available:
1989 UT R.A. (1950) Decl. Mag. Observer
July 2.38646 20 03 54.81 -27 32 35.6 16.0 Helin
3.39931 20 04 39.56 -28 05 26.6 "
3.45868 20 04 41.30 -28 07 21.4 "
4.32135 20 05 20.01 -28 35 32.1 15.5 "
4.39063 20 05 22.46 -28 37 48.5 "
5.47779 20 06 08.48 -29 13 26.2 Tholen
E. Helin, B. Roman, C. Mikolajczak, and A. Mejia (Palomar).
0.46-m Schmidt telescope. Measurer B. Roman.
D. J. Tholen, A. J. Pickles, and F. Cheigh (Mauna Kea). 2.24-m
telescope encoders.
The following orbital elements, by B. G. Marsden, Center
for Astrophysics, are somewhat uncertain:
T = 1989 July 20.48 ET Peri. = 200.76
e = 0.5152 Node = 97.23 1950.0
q = 1.4830 AU Incl. = 15.51
a = 3.0593 AU n = 0.18419 P = 5.35 years
1989 ET R.A. (1950) Decl. Delta r V
July 3 20 04.37 -27 52.2 0.494 1.494 15.0
8 20 07.84 -30 36.4
13 20 10.96 -33 20.8 0.480 1.485 14.8
18 20 13.81 -35 59.9
23 20 16.51 -38 28.7 0.484 1.483 14.9
28 20 19.18 -40 42.6
Aug. 2 20 21.98 -42 38.4 0.506 1.488 15.2
7 20 25.07 -44 13.8
12 20 28.60 -45 28.1 0.543 1.500 15.5
17 20 32.69 -46 21.6
22 20 37.36 -46 55.2 0.594 1.519 15.8
27 20 42.62 -47 10.4
Sept. 1 20 48.48 -47 08.7 0.656 1.544 16.1
1989 July 7 (4807) Daniel W. E. Green
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