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IAUC 7841: N LMC 2002; GK Per; C/1997 G7, C/1997 H4,, C/1997 H5

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                                                  Circular No. 7841
Central Bureau for Astronomical Telegrams
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
URL http://cfa-www.harvard.edu/iau/cbat.html  ISSN 0081-0304
Phone 617-495-7440/7244/7444 (for emergency use only)

     W. Liller, Vina del Mar, Chile, reports his discovery of an
apparent nova on two unfiltered Kodak Technical Pan films obtained
using a 0.2-m Schmidt camera on Mar. 3.1 UT.  The new object was
also present on two films taken on Feb. 27.1, but it was not
present on films taken of the region on Feb. 21.1.  The object's
position was measured by Liller from a CCD frame taken at the
telescope's Newtonian focus on Mar. 4.066 (when the new star was at
V = 10.98):  R.A. = 5h36m46s.64, Decl. = -71o35'34".4 (equinox
2000.0).  On Mar. 4.09, a low-dispersion objective-prism CCD
spectrogram, also taken by Liller with the Schmidt camera, showed
the object to have H_alpha in emission with a strength
approximately 1.9 times that of the surrounding continuum.  H-beta
was also clearly present.  Liller's photographic magnitudes:  Feb.
21.063, [15.0; 27.064, 12.5: (moonlit cirrus clouds); Mar. 3.066,

     J. A. Mattei, AAVSO, reports that this 1901 nova has gone into
a minor outburst.  GK Per has a quasiperiodic outburst interval
ranging from 900 to 1340 days, the last outbursts occurring in 1992
(IAUC 5558), 1996 (IAUC 6325), and 1999 (IAUC 7115), each time
taking about a month to reach maximum at mean mag 10.3-10.5.
Visual magnitude estimates:  Mar. 1.047 UT, 13.3 (S. Tracy, N.
Granby, CT); 1.263, 12.8 (M. Linnolt, San Francisco, CA); 1.819,
12.7 (J. Virtanen, Ylivieska, Finland); 2.121, 12.5 (R. Stine,
Northridge, CA); 2.813, 12.4 (F. van Loo, Genk, Belgium); 3.219,
12.7 (T. Burrows, Novato, CA); 3.788, 12.2 (J. Speil, Piastow,
Walbrzych, Poland); 3.842, 12.5 (W. Kriebel, Osterwaal, Germany);
4.271, 12.0 (Linnolt).

COMETS C/1997 G7, C/1997 H4, AND C/1997 H5 (SOHO)
     Further to IAUC 7839, D. Biesecker reports measurements for
three additional sungrazing comets, found on SOHO C2 and C3
coronagraph website images by R. Kracht, that appear to be members
of the Meyer group (cf. IAUC 7832).  The reduced astrometry and
orbital elements by B. G. Marsden appear on the MPECs cited below.

  Comet         1997 UT          R.A. (2000) Decl.       MPEC
  C/1997 G7     Apr.  8.880       1 13.9   + 9 03       2002-D16
  C/1997 H4          21.065       2 00.8   +12 32       2002-D41
  C/1997 H5          29.028       2 28.9   +15 18       2002-D41

                      (C) Copyright 2002 CBAT
2002 March 4                   (7841)            Daniel W. E. Green

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