Central Bureau for Astronomical Telegrams
IAUC 4911: 1989a1
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Read IAUC 4912
Circular No. 4911
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
COMET AARSETH-BREWINGTON (1989a1)
The following additional precise positions have been reported:
1989 UT R.A. (1950) Decl. m1 Observer
Nov. 19.36562 16 17 37.54 +26 41 28.3 8 Hayakawa
20.37743 16 17 51.20 +25 57 07.1 8.5 "
20.38368 16 17 51.03 +25 56 51.0 8.5 Seki
20.38437 16 17 50.95 +25 56 53.1 Hayakawa
20.39653 16 17 51.10 +25 56 17.1 Seki
21.36944 16 18 03.71 +25 13 08.9 Arai
22.06078 16 18 12.70 +24 42 04.8 Skiff
22.06701 16 18 12.80 +24 41 46.4 "
S. Hayakawa (YGCO Nagano station). 0.25-m f/4.0 reflector.
T. Seki (Geisei). Tail 5' long in p.a. 345 deg.
M. Arai and H. Mori (Yorii Obs.). Communicated by T. Kobayashi.
B. Skiff (Lowell Observatory, Anderson Mesa Station). Tail about
20' long in p.a. 17 deg. Communicated by E. Bowell.
Preliminary parabolic orbital elements by B. G. Marsden, Center
for Astrophysics, from 8 observations, Nov. 19-22:
T = 1989 Dec. 28.238 ET Peri. = 204.714
Node = 346.487 1950.0
q = 0.30687 AU Incl. = 88.593
1989/90 R.A. (1950) Decl. Delta r m1
Nov. 20 16 17.78 +26 13.7 1.414 1.029 8.9
25 16 18.86 +22 25.6
30 16 19.96 +18 11.8 1.287 0.822 7.7
Dec. 5 16 21.15 +13 19.4
10 16 22.69 + 7 27.4 1.141 0.605 6.1
15 16 25.39 + 0 03.5
20 16 31.72 - 9 37.9 0.994 0.396 4.0
25 16 48.52 -22 05.1
30 17 28.93 -35 11.0 0.949 0.312 2.8
Jan. 4 18 35.58 -43 41.4
9 19 46.18 -46 01.1 1.119 0.465 4.9
1989 November 22 (4911) Daniel W. E. Green
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