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IAUC 7157: C/1999 H4; 1999bz; 1999by; V4444 Sgr

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                                                  Circular No. 7157
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Mailstop 18, 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)
URL http://cfa-www.harvard.edu/iau/cbat.html  ISSN 0081-0304
Phone 617-495-7244/7440/7444 (for emergency use only)


COMET C/1999 H4 (SOHO)
     D. A. Biesecker, SM&A Corporation and Goddard Space Flight
Center, reports observations of another apparent Kreutz sungrazing
comet that was discovered by S. Gregory (University of Maryland)
and was detected by both the C2 and C3 coronagraphs.  There was a
short tail evident, and on Apr. 27.6 UT the comet's magnitude was
found to be about 4.6.  Astrometric measurements, made by Gregory
and Biesecker (and reduced by G. V. Williams, Smithsonian
Astrophysical Observatory), together with orbital elements by B. G.
Marsden, are given on MPEC 1999-J05.

     1999 UT             R.A. (2000) Decl.
     Apr. 26.821        2 29.7       +11 29


SUPERNOVA 1999bz IN UGC 8959
     M. Modjaz and W. D. Li, University of California at Berkeley,
on behalf of the Lick Observatory Supernova Search (cf. IAUC 6627,
7126), report their discovery with the 0.8-m Katzman Automatic
Imaging Telescope (KAIT), of an apparent supernova in UGC 8959.  SN
1999bz was discovered on an unfiltered image taken on May 1.4 UT
(mag about 17.6).  Inspection of an earlier KAIT image on Apr. 24.4
shows a hint of the new star.  The supernova is located at R.A. =
14h01m46s.75, Decl. = +68o52'46".5 (equinox 2000.0), which is about
12" west and 8" north of the nucleus of UGC 8959.  A KAIT image of
the same field on Apr. 19.4 (limiting mag about 19) showed nothing
at the position of SN 1999bz.


SUPERNOVA 1999by IN NGC 2841
     CCD magnitudes, unfiltered unless otherwise noted: Apr. 30.826
UT, 15.5 (Erno Berko, Ludanyhalaszi, Hungary; independent discovery,
0.1-m refractor); May 1.885, 14.5 (M. Armstrong, Rolvenden, Kent,
England); 2.872, V = 14.42 +/- 0.05, B-V = +0.27 +/- 0.05, V-I =
+0.11 +/- 0.02 (D. Hanzl, Brno, Czech Republic; comparison star GSC
3431.625, using Tycho magnitudes V = 11.05, B-V = +0.564, V-I =
+0.64).


V4444 SAGITTARII
     Visual magnitude estimates:  Apr. 30.644 UT, 9.1 (A. Pearce,
Nedlands, W. Australia); May 1.640, 9.6 (Pearce); 2.170, 10.0 (T.
A. Napoleao, Sao Paulo, Brazil); 3.052, 9.5 (A. Baransky, Kiev,
Ukraine).

                      (C) Copyright 1999 CBAT
1999 May 3                     (7157)            Daniel W. E. Green

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