Central Bureau for Astronomical Telegrams
IAUC 4869: 1989v; 1989r; 1989o; P/SCHWASSMANN-WACHMANN 1
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Circular No. 4869
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 HELIN-ROMAN-ALU (1989v)
Eleanor F. Helin reports her discovery of a new comet on films taken
by herself, Brian Roman, Jeff Alu, and R. Bambery with the 0.46-m Schmidt
telescope at Palomar. The object is diffuse with some condensation.
The following positions were measured by Roman:
1989 UT R.A. (1950) Decl. m1
Oct. 1.33958 0 15 01.18 - 6 46 12.7 14.5
1.36406 0 14 54.89 - 6 45 16.1
2.24705 0 11 17.25 - 6 10 54.7
2.44253 0 10 27.21 - 6 03 11.8
COMET OKAZAKI-LEVY-RUDENKO (1989r)
Total visual magnitude estimates (cf. IAUC 4861): Sept.
23.10 UT, 8.3 (C. S. Morris, La Junta, CO, 20x80 binoculars);
24.83, 8.0 (G. Keitch, Wrington, Avon, U.K., 10x50 binoculars);
25.78, 8.0 (R. Haver, Tolfa, Italy, 15x80 binoculars); 26.85,
8.2 (A. Pereira, Cabo da Roca, Portugal, 9x34 binoculars); 28.06,
8.2 (G. R. Chester, Rixeyville, VA, 0.37-m reflector; 10' fan-shaped
tail in p.a. 50 deg); 29.09, 8.2 (G. Kronk, Troy, IL, 20x80
binoculars); 30.78, 7.8 (A. Boattini, Consuma, Italy, 10x50
binoculars); Oct. 1.02, 7.6 (D. W. E. Green, Dover, MA, 20x80
binoculars); 2.01, 7.8 (Green, Cambridge, MA).
PERIODIC COMET BRORSEN-METCALF (1989o)
Total visual magnitude estimates (cf. IAUC 4856): Sept. 20.25
UT, 6.2 (M. Kidger, Tenerife, Canary Is., 12x50 binoculars); 25.45,
7.7 (G. Kronk, Troy, IL, 0.33-m reflector; low altitude, twilight);
25.50, 6.8: (A. Hale, Las Cruces, NM, 0.41-m reflector; low altitude,
twilight).
PERIODIC COMET SCHWASSMANN-WACHMANN 1
H. Kosai, National Astronomical Observatory of Japan, reports
the following total magnitude estimates by M. Tsumura, Oishi, Japan,
from 2415 films (0.31-m reflector and 0.16-m Wright Schmidt; +/- 0.5
mag): Aug. 8.67 UT, 14.0; 28.70, 14.0; Sept. 3.76, 15.0; 9.71, 14.5;
11.77, 15.0. The images are diffuse on each photograph.
1989 October 2 (4869) Daniel W. E. Green
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