Central Bureau for Astronomical Telegrams
IAUC 2806: 1975h; 1973 NA
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Read IAUC 2807
Circular No. 2806
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
COMET KOBAYASHI-BERGER-MILON (1975h)
Further precise positions have been reported as follows:
1975 UT R. A. (1950) Decl. m1 Observer
July 7.57986 21 31 30.61 - 0 18 50.0 Clark
11.52892 21 11 59.47 + 8 25 37.2 Kilmartin
11.53575 21 11 56.84 + 8 26 41.8 "
11.97957 21 09 05.69 + 9 39 11.1 9.5 Debehogne
12.00242 21 08 56.33 + 9 42 57.4 "
12.50903 21 05 27.96 +11 11 19.3 Kilmartin
12.51811 21 05 24.15 +11 12 56.1 "
13.94502 20 54 14.66 +15 43 38.7 9.5 Debehogne
13.98450 20 53 53.89 +15 51 48.3 "
14.07706 20 53 04.64 +16 10 49.3 5.7 Milet
14.10932 20 52 47.51 +16 17 24.7 "
14.78993 20 46 29.46 +18 42 04.7 Seki
14.97622 20 44 41.53 +19 22 59.7 9.5 Debehogne
17.01370 20 21 03.68 +27 30 29.1 9.0 "
17.03102 20 20 49.91 +27 34 42.6 "
17.62535 20 12 26.78 +30 08 30.3 5 Tomita
17.62847 20 12 23.97 +30 09 19.8 "
17.70347 20 11 16.39 +30 28 59.4 4.4 Seki
17.70903 20 11 11.31 +30 30 27.1 "
18.32396 20 01 33.88 +33 13 02.4 Giclas
18.33160 20 01 26.37 +33 15 05.7 "
18.51493 19 58 24.24 +34 04 02.5 Urata
18.52431 19 58 14.59 +34 06 31.0 "
18.67309 19 55 40.59 +34 46 08.5 4 Tomita
18.68611 19 55 26.13 +34 49 49.9 Seki
18.68889 19 55 23.13 +34 50 34.4 "
18.71006 19 55 01.46 +34 55 56.1 Tomita
18.98798 19 50 05.01 +36 10 30.9 Milet
19.11713 19 47 41.15 +36 44 59.0 "
21.00952 19 07 06.15 +44 56 31.2 "
21.02649 19 06 40.85 +45 00 40.6 "
23.07055 18 09 21.03 +52 22 44.8 "
23.08925 18 08 45.93 +52 26 05.4 "
23.11944 18 07 51.92 +52 31 43.2 Harrington
23.12639 18 07 38.66 +52 32 59.7 "
M. Clark (Mount John University Observatory). 10-cm f/6 astrograph.
Measurer: Pamela M. Kilmartin.
P. M. Kilmartin and A. C. Gilmore (Carter Observatory). 41-cm
Cassegrain reflector. July 11 images slightly trailed.
H. Debehogne (Royal Observatory, Uccle). 40-cm f/5 astrograph.
B. Milet (Nice Observatory).
T. Seki (Kochi Observatory, Geisei Station). The July 14 position
corrects that on IAUC 2803.
K. Tomita (Tokyo Observatory). Communicated by K. Osawa.
H. L. Giclas (Lowell Observatory). 33-cm photographic telescope.
Measurer: Mary Lou Kantz.
T. Urata and M. Nozaki (Nihondaira Observatory). 15-cm f/6
reflector.
R. S. Harrington (U.S. Naval Observatory, Washington). 38-cm
astrograph stopped to 22-cm. Comet images diffuse and trailed.
Further selected total visual magnitude estimates and coma
diameters: July 16.52 UT, 6.2, - (B. Sumner, Windsor, Queensland,
7 x 50 binoculars); 16.96, 5.5, 15' (D. A. Pickup, Penicuik, Scotland,
11 x 80 binoculars); 18.31, 5.6, - (N. J. Mayo, Agoura, California,
11-cm f/5 reflector); 19.20, 5.3, 10' (K. Simmons, Switzerland,
Florida, 7 x 50 binoculars); 20.14, 5.7, - (Simmons); 21.21,
5.5, - (Mayo); 22.16, 5.3, 20'-25' (P. Maley, Houston, Texas, 7 x
35 binoculars); 23.17, 5.3, - (Simmons); 24.16, 5.1, - (Simmons);
25.13, 5.0, 20'-25' (Maley); 27.19, 4.8, 15' (M. J. Mayo, Wrightwood,
California, 7 x 50 binoculars; tail 2o long in p.a. 115o).
Photographs by D. and C. di Cicco on July 27.1 (20-cm f/1.5 Schmidt
telescope, 5-min and 3-min exposures, Plus-X film) at Harvard,
Massachusetts, show a type I tail more than 2o long in p.a. 124o.
1973 NA
Mrs. E. Helin, California Institute of Technology, communicates
the following precise positions, measured by J. Sanders and
S. J. Bus from plates taken by E. Helin and T. Kiceniuk with,
respectively, the 46-cm and 122-cm Schmidt telescopes at Palomar
Mountain Observatory. There is evidently still some uncertainty in
the times of the July 6 observations (cf. IAUC 2564, 2566).
1973 UT R. A. (1950) Decl. Observer
July 4.27153 17 33 28.48 -20 48 10.3 Helin
4.28542 17 33 10.68 -20 57 05.5 "
4.29514 17 32 56.89 -21 04 00.0 "
4.30208 17 32 47.99 -21 08 27.3 "
6.31389 16 53 40.41 -38 07 23.4 Kiceniuk
6.31736 16 53 36.31 -38 08 40.3 "
6.35278 16 52 59.10 -38 21 26.4 "
6.35625 16 52 55.14 -38 22 44.2 "
7.20903 16 38 46.04 -42 59 48.6 "
7.21250 16 38 42.80 -43 00 46.0 "
1975 July 29 (2806) Brian G. Marsden
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