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IAUC 6264: HT Cas; 2EG J0432+2910; 15P; 45P

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                                                  Circular No. 6264
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)


HT CASSIOPEIAE
     J. A. Mattei, AAVSO, reports that this SU UMa-type dwarf nova
is in outburst for the first time since 1987 Feb., its previous
quiesence durations having been much shorter.  Because the Hubble
Space Telescope is scheduled to observe HT Cas on Nov. 23, she
encourages complementary photometric and spectroscopic observations.
Selected visual magnitudes: Nov. 12.08 UT, [16.0 (D. York, Abiquiui,
NM); 16.09, 15.8 (York); 17.733, 13.2 (P. Schmeer, Bischmisheim,
Germany); 17.912, 13.4 (W. Worraker, Didcot, U.K.); 17.99, 13.4 (R.
Stewart, Fairlawn, NJ); 18.02, 13.4 (J. Bortle, Stormville, NY);
18.30, 13.1 (J. Griese, Stamford, CT).


2EG J0432+2910
     W. Voges and G. Kanbach, Max-Planck-Institut fur
Extraterrestrische Physik, Garching, report:  "Near the radio
position of 2EG J0432+2910 (IAUC 6258), we have found a hard x-ray
source, RX J0433.6+2906, in the ROSAT all-sky survey data centered
on R.A. = 4h33m39s, Decl. = +29o06'.2 (equinox 2000.0; estimated
error 25" in 1-sigma radius), which is within 22" of the radio
position; see also Neumann et al. (1994, A.Ap. Suppl. 106, 303),
who refer to the object as EF 0430+2859.  The PSPC count rate in
the ROSAT band (0.1-2.4 keV) was 0.05 count/s during 1990 Aug. 21-
23.  The energy flux is about 2 x 10E-12 erg cmE-2 sE-1.  This is
the only ROSAT x-ray source within a radius of 1 deg.  Condon et
al. (1983, A.J. 88, 20) quote flux densities of 0.22, 0.37, and
0.36 Jy at 1.4, 2.695, and 8.085 GHz, respectively, from
interferometer observations made in 1978 of a source 0430+290,
which they optically identified with an extended (about 5") galaxy
(estimated mag 19.0)."


COMET 15P/FINLAY
     Total CCD magnitudes from J. V. Scotti, Kitt Peak (0.9-m
Spacewatch telescope):  Oct. 26.47 UT, 20.2; Nov. 18.52, 20.5.


COMET 45P/HONDA-MRKOS-PAJDUSAKOVA
     Total CCD magnitudes:  Oct. 21.21 UT, 21 (D. J. Tholen, Mauna
Kea, 2.24-m reflector); 22.21, 21 (Tholen); Nov. 16.38, 15.9 (A.
Nakamura, Kuma, Ehime, Japan, 0.60-m reflector); 18.38, 15.7
(Nakamura).


1995 November 18               (6264)            Daniel W. E. Green

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