Central Bureau for Astronomical Telegrams
IAUC 2785: 1975e; Obs OF COMETS; 1975c; 1975b; 1969 II
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Circular No. 2785
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Cable Address: SATELLITES, NEWYORK
Western Union: RAPID SATELLITE CAMBMASS
PERIODIC COMET SMIRNOVA-CHERNYKH (1975e)
The following precise positions have been reported:
1975 UT R. A. (1950) Decl. m1 Observer
Apr. 12.13206 9 15 22.25 +23 38 47.1 McCrosky
15.06175 9 15 53.01 +23 31 56.8 "
29.11637 9 20 28.58 +22 49 36.6 Shao
29.93682 9 20 50.34 +22 46 36.2 16.0 South
30.09493 9 20 55.23 +22 46 06.7 Schwartz
May 2.80082 9 22 13.53 +22 36 08.4 16-16.5 Chernykh
4.19913 9 22 56.52 +22 30 47.7 Roemer
4.22188 9 22 57.23 +22 30 42.2 "
4.80741 9 23 15.83 +22 28 24.0 Chernykh
7.83018 9 24 56.28 +22 16 16.2 "
10.80917 9 26 43.33 +22 03 43.8 "
11.81035 9 27 20.99 +21 59 22.9 "
14.81834 9 29 18.48 +21 45 59.4 "
R. E. McCrosky, C. Y. Shao, G. Schwartz and J. H. Bulger (Harvard
College Observatory, Agassiz Station). 41-cm astrograph on Apr.
12 and 15, 155-cm reflector on Apr. 29 and 30. Effective time
of exposure uncertain on Apr. 29; images strongly affected by
(instrumental) coma on Apr. 30. Measurer: Shao.
R. H. S. South and R. L. Waterfield (Woolston Observatory). 15-cm
f/4.5 refractor. Slightly diffuse central coma 20" in diameter.
Measurer: Waterfield.
N. S. Chernykh (Crimean Astrophysical Observatory). Comet faint
and diffuse, circular, with condensation. Reduced at I.T.A.,
Leningrad. Communicated by N. A. Bokhan.
E. Roemer and L. M. Vaughn (University of Arizona). Steward Observatory
229-cm reflector, Kitt Peak. Measurer: Carolyn McCarthy.
OBSERVATIONS OF COMETS
The following precise positions of comets P/Borrelly (1973m)
and van den Bergh (1974g) have been obtained by R. E. McCrosky et
al. with the 155-cm reflector at Harvard's Agassiz Station:
Comet 1974/75 UT R. A. (1950) Decl.
1973m Dec. 23.40516 13 58 56.65 +18 12 55.9
1974g Mar. 4.01896 1 5 53.28 +19 28 58.1
PERIODIC COMET KOHOUTEK (1975c)
Further precise positions have been reported as follows:
1975 UT R. A. (1950) Decl. m1 Observer
Apr. 3.87102 6 09 36.37 +20 12 44.3 15.5 Sykes
May 5.14931 7 30 40.13 +17 58 58.6 Roemer
5.18073 7 30 44.78 +17 58 46.8 "
D. E. Sykes (Woolston Observatory). 15-cm f/4.5 refractor. Very
heavily condensed central coma 10" in diameter, faint outer coma
1' in diameter. Measurer: R. L. Waterfield.
E. Roemer and M. A. Daniel (University of Arizona). Steward
Observatory 229-cm reflector, Kitt Peak. Comet image overexposed;
considerably brighter than expected. Measurer: Carolyn McCarthy.
PERIODIC COMET WEST-KOHOUTEK-IKEMURA (1975b)
The following precise positions have been reported:
1975 UT R. A. (1950) Decl. Observer
Mar. 10.19896 3 13 43.63 +21 25 27.6 Hestir
May 9.15972 6 34 51.07 +40 13 03.4 Roemer
17.15833 7 04 41.96 +40 41 45.3 "
17.18067 7 04 46.90 +40 41 47.3 "
K. Hestir (Joint Observatory for Cometary Research). 37-cm f/2
Schmidt camera. Measurer: R. S. Harrington.
E. Roemer (University of Arizona). Lunar and Planetary Laboratory
154-cm reflector on May 9, Steward Observatory reflector (with
L. M. Vaughn assisting) on May 17. Measurer: Carolyn McCarthy.
PERIODIC COMET GUNN (1969 II)
The following precise positions have been reported:
1975 UT R. A. (1950) Decl. m1 Observer
Mar. 21.75208 12 44 37.09 +10 07 43.8 14 Seki
May 10.89115 12 12 32.86 +10 56 06.4 15.5 Mrkos
10.90608 12 12 32.65 +10 56 04.4 Petrovicova
13.86126 12 11 48.09 +10 45 39.0 16.0 Mrkos
14.85976 12 11 35.44 +10 41 54.6 15.5 "
14.87417 12 11 35.27 +10 41 48.7 "
T. Seki (Kochi Observatory, Geisei Station). From Orient. Astron.
Assoc. Comet Bull. No. 101.
A. Mrkos and Ruzena Petrovicova (Klet Observatory).
1975 June 2 (2785) Brian G. Marsden
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