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IAUC 7689: 2001dt; C/2001 P1, C/2001 P2; 39P

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IAUC number

                                                  Circular No. 7689
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 2001dt IN UGC 12558
     W. D. Li, University of California at Berkeley, reports the
discovery by LOTOSS (cf. IAUC 7514) of an apparent supernova (mag
about 18.2) in unfiltered images taken with the Katzman Automatic
Imaging Telescope (KAIT) on Aug. 23.4 and 24.4 UT.  The new object
is located at R.A. = 23h22m19s.17, Decl. = +50o09'25".3 (equinox
2000.0), which is 1".3 west and 8".0 south of the nucleus of UGC
12558.  A KAIT image taken on Aug. 14.4 UT showed nothing at this
position (limiting mag about 19.5).

COMETS C/2001 P1 AND C/2001 P2 (SOHO)
     Further to IAUC 7667, astrometry (measured by D. Hammer,
reduced by B. G. Marsden) and orbital elements are given on the
MPECs cited below for two additional sungrazing comets found by T.
Scarmato and S. Hoenig, respectively, on SOHO website images:

  Comet         2001 UT          R.A. (2000) Decl.       MPEC
  C/2001 P1     Aug.  4.971       8 48.5   +16 12       2001-P22
  C/2001 P2          15.221       9 22.7   +13 02       2001-Q02

COMET 39P/2001 P3 (OTERMA)
     Y. R. Fernandez, University of Hawaii, reports his recovery of
comet 39P on CCD frames obtained on Aug. 13 (see below) with the
2.2-m University of Hawaii reflector, confirmatory images being
obtained on Aug. 20 and 21 by K. J. Meech and J. Pittichova.  The
object, a point source, was located about 2' from the prediction by
B. G. Marsden on MPC 34423 (ephemeris on MPC 42373).  Meech then
succeeded in locating the comet on her CCD frames from 1999 May 9
and July 15.  M. A. Kadooka and J. M. Bauer assisted, and the
measurements by Meech are given on MPEC 2001-Q35.  The recovery
also confirms the correctness of positions tentatively measured by
G. V. Williams from images obtained by D. C. Jewitt, J. X. Luu, and
C. A. Trujillo on 1998 May 1 and 22.  MPEC 2001-Q35 also includes
orbital elements from 227 observations (1942-2001) and a revised
ephemeris.  Last observed in Aug. 1962, comet 39P passed 0.095 AU
from Jupiter on 1963 Apr. 12, after which q increased from 3.4 to
5.5 AU and P from 7.9 to 19 years (with T = 1983 June 18 and 2002
Dec. 22).

     2001 UT             R.A. (2000) Decl.        m2
     Aug. 13.42834   23 29 40.16   - 2 37 11.5   22.0

                      (C) Copyright 2001 CBAT
2001 August 24                 (7689)            Daniel W. E. Green

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