Circular No. 6230

Central Bureau for Astronomical Telegrams INTERNATIONAL ASTRONOMICAL UNION

Postal Address: Central Bureau for Astronomical Telegrams Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A. IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)

BMARSDEN@CFA.HARVARD.EDU or DGREEN@CFA.HARVARD.EDU (science) Phone 617-495-7244/7440/7444 (for emergency use only)

COMET 1995 S1

The following precise positions have been reported:

1995 UT α_{2000} δ_{2000} m_{1} Observer
Sept.18.75576 9^{h}06^{m}53.^{s}95 −1^{o}32′16′′.7  Garradd
18.75986 9 06 54.76 −1 32 03.2  _{”}
18.76104 9 06 55.06 −1 31 58.7  _{”}
18.76306 9 06 55.53 −1 31 51.9  _{”}
18.78339 9 06 59.87 −1 30 41.1  _{”}
18.78407 9 07 00.00 −1 30 38.7  _{”}
18.78488 9 07 00.22 −1 30 45.8 7.9 Yusa
18.79279 9 07 01.78 −1 30 19.2  _{”}
18.79882 9 07 03.13 −1 29 56.5  _{”}
18.80461 9 07 04.32 −1 29 33.1  _{”}
18.80859 9 07 05.20 −1 29 22.0  _{”}
18.80911 9 07 05.32 −1 29 20.0  Cross
18.81219 9 07 05.99 −1 29 09.2  _{”}
18.81303 9 07 06.09 −1 29 06.0  Yusa
18.81468 9 07 06.52 −1 29 00.6  Cross
18.81927 9 07 07.49 −1 28 42.6  Seki
18.82417 9 07 08.52 −1 28 27.1  Yoshida
18.82660 9 07 09.11 −1 28 17.1  _{”}
18.82760 9 07 09.34 −1 28 14.2  Seki
18.83200 9 07 10.32 −1 28 00.2  Nakamura
18.83351 9 07 10.66 −1 27 54.8  _{”}
18.83495 9 07 10.96 −1 27 50.1  _{”}

G. J. Garradd (Loomberah, N.S.W.). 0.25-m f/4.1 reflector + CCD. T. Yusa (Kogota, Japan). λ = 141^{o}.08667 east, ϕ = +38^{o}.53994, h = 10 m.

0.20-m f/6.3 Schmidt-Cassegrain + CCD. K. Cross (Sendai Astronomical Observatory). 0.41-m f/3.3 reflector +

CCD. T. Seki (Geisei). 0.60-m f/3.5 reflector. 15′ tail in p.a. 261^{o}. S. Yoshida (Wakayama). 0.25-m f/6.3 Schmidt-Cassegrain + CCD. A. Nakamura (Kuma Kogen). 0.60-m f/6.0 Ritchey-Chrétien + CCD.

Total visual magnitude estimates: Sept. 17.824 UT, 6: (T. Seki, 0.20m refractor; independent discovery; 5′ tail in p.a. 260^{o}); 18.82, 5.5 (Seki); 19.38, 6.4 (J. E. Bortle, Stormville, NY, 10×50 binoculars; 5′ coma).

1995 September 19 Daniel W. E. Green