Central Bureau for Astronomical Telegrams
IAUC 5116: MARS; 1990c; 1990k; 1990i
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Read IAUC 5117
Circular No. 5116
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
MARS
D. Parker, Association of Lunar and Planetary Observers, reports
the appearance of a new dust cloud on Mars that expanded from
a central location of 30 deg west longitude, 0 deg latitude on Oct.
4.08 UT to 42 deg west, -12 deg on Oct. 5.08, surrounding Aurorae
Sinus.
COMET LEVY (1990c)
Ephemeris extension from orbital elements on MPC 16841:
1990 ET R.A. (1950) Decl. Delta r m1
Oct. 16 15 07.33 -39 50.2 1.482 0.951 5.6
26 14 52.65 -40 17.2
Nov. 5 14 39.94 -40 29.6 1.760 0.960 6.0
15 14 28.38 -40 33.9
25 14 17.16 -40 35.2 1.831 1.087 6.7
Dec. 5 14 05.21 -40 36.1
15 13 51.17 -40 35.8 1.720 1.288 7.3
PERIODIC COMET HOLT-OLMSTEAD (1990k)
Ephemeris extension to IAUC 5097:
1990 ET R.A. (1950) Decl. Delta r m1
Oct. 16 1 13.35 +11 36.6 1.047 2.043 17.2
26 1 03.52 +12 37.4
Nov. 5 0 55.54 +13 33.2 1.115 2.058 17.4
15 0 50.46 +14 27.1
25 0 48.83 +15 22.5 1.269 2.084 17.7
Dec. 5 0 50.68 +16 21.9
15 0 55.71 +17 26.5 1.485 2.121 18.1
COMET TSUCHIYA-KIUCHI (1990i)
Total visual magnitude estimates (cf. IAUC 5082): Oct. 3.49
UT, 7.7 (A. Hale, Las Cruces, NM, 0.41-m reflector); 10.24, 6.9 (A.
Pereira, Cabo da Roca, Portugal, 9x34 binoculars).
1990 October 11 (5116) Daniel W. E. Green
Read IAUC 5117
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