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IAUC 7631: 2001bs; SUNGRAZING COMETS; C/2001 K3

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                                                  Circular No. 7631
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)

SUPERNOVA 2001bs IN UGC 10018
     S. Beckman and W. D. Li, University of California at Berkeley,
report the discovery by LOTOSS (cf. IAUC 7514) of an apparent supernova
in unfiltered images taken with the Katzman Automatic Imaging Telescope
(KAIT) on May 22.4 UT (mag about 18.3) and May 23.3 UT (mag about 18.2).
The new object is located at R.A. = 15h43m39s.38, Decl. = +67o45'31".3
(equinox 2000.0), which is 0".9 west and 7".7 south of UGC 10018.  A
KAIT image of the same field taken on May 7.4 UT showed nothing at this
position (limiting mag about 19.0).

     Further to IAUC 7613, MPEC 2001-H44, 2001-J3, 2001-J35 and 2001-K19 give
detailed information on six more Kreutz sungrazing comets, the SOHO discovery
observations of which are:

     2001 UT           R.A. (2000) Decl.       Comet
     Apr. 26.488       2 29.2      +11 49      C/2001 H6
          30.188       2 35.6      +13 37      C/2001 H7
     May   5.354       2 55.1      +15 04      C/2001 J2
           6.729       2 56.4      +15 05      C/2001 J3
          10.131       3 12.8      +16 16      C/2001 J4
          19.471       3 51.6      +17 35      C/2001 K2

     B. A. Skiff, Lowell Observatory, reports his discovery of a comet on
images taken with the LONEOS 0.59-m Schmidt on May 22.4 (discovery position
below); the coma was well condensed, about 20" in diameter, and a tail
extended about 60" in p.a. 225 deg.  Following placement in The NEO
Confirmation Page, further observations were reported, and they are listed on
MPEC 2001-K24, together with preliminary parabolic orbital elements (T = 2001
Jan. 12, q = 1.87 AU, Peri. = 315 deg, Node = 281 deg, Incl. = 37 deg,
equinox 2000.0).  M. Tichy and M. Kocer (Klet, 0.57-m reflector) reported a
compact 8" coma; D. T. Durig (Sewanee, TN, 0.30-m reflector) a 30" tail; K.
Smalley (Olathe, KS, 0.75-m reflector) a tail approximately 30 deg wide,
brightest along the southern edge (p.a. about 210 deg), where it extended
for about 2'; R. Dyvig (Quinn, SD, 0.66-m reflector) a possible coma and faint
tail in p.a. about 225 deg.

     2001 UT             R.A. (2000) Decl.        m1
     May  22.39643   20 59 32.00   - 6 28 00.2   16.0

                      (C) Copyright 2001 CBAT
2001 May 23                   (7631)              Brian G. Marsden

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