Central Bureau for Astronomical Telegrams
IAUC 5137: 1990 TR; 1990 SQ; MWC 560; 1989t
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Read IAUC 5138
Circular No. 5137
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 TR
This object was independently discovered at the Crimean
Astrophysical Observatory by A. V. Tarasova and L. I. Chernykh on
Sept. 24. The following ephemeris extends that on IAUC 5121:
1990/91 R.A. (1950) Decl. Delta r V
Nov. 25 1 56.09 +27 17.3 0.522 1.467 14.3
Dec. 5 2 00.39 +27 27.7
15 2 08.32 +27 35.4 0.714 1.575 15.3
25 2 19.23 +27 45.8
Jan. 4 2 32.49 +28 00.8 0.953 1.688 16.2
1990 SQ
Extension to the ephemeris on IAUC 5113:
1990 ET R.A. (1950) Decl. Delta r V
Nov. 25 21 44.70 +28 39.1 0.393 1.104 13.2
30 21 54.33 +32 16.8
Dec. 5 22 05.64 +35 48.2 0.412 1.106 13.3
10 22 18.84 +39 12.3
15 22 34.21 +42 28.2 0.432 1.119 13.4
20 22 52.07 +45 34.3
25 23 12.75 +48 28.1 0.454 1.142 13.5
MWC 560
Further visual magnitude estimates (cf. IAUC 5009): Oct. 5.18
UT, 9.7 (P. Schmeer, Bischmisheim, Germany); 9.17, 9.3 (A. Pereira,
Cabo da Roca, Portugal); 17.18, 9.2 (H. Dahle, Oslo, Norway); Nov.
7.18, 9.7 (Schmeer); 13.22, 9.4 (Pereira).
PERIODIC COMET WILD 2 (1989t)
Total visual magnitude estimates (cf. IAUC 5123): Oct. 30.51
UT, 12.6 (A. Hale, Las Cruces, NM, 0.41-m reflector); Nov. 10.54,
12.4 (C. S. Morris, Pine Mountain Club, CA, 0.26-m reflector);
15.52, 12.3 (Hale).
1990 November 19 (5137) Daniel W. E. Green
Read IAUC 5138
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