Central Bureau for Astronomical Telegrams

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IAUC 7508: 2000dt; C/1999 U6, C/2000 T3, C/2000 T4

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                                                  Circular No. 7508
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)
CBAT@CFA.HARVARD.EDU (science)
URL http://cfa-www.harvard.edu/iau/cbat.html  ISSN 0081-0304
Phone 617-495-7440/7244/7444 (for emergency use only)


SUPERNOVA 2000dt IN UGC 3411
     G. M. Hurst, Basingstoke, England, reports the discovery by M.
Armstrong, Rolvenden, of an apparent supernova (mag 17.5) on
unfiltered CCD images (limiting mag 19.5) taken with a 0.35-m
Schmidt-Cassegrain telescope in the course of the U.K. Nova/
Supernova Patrol on Oct. 13.058, 13.914, and 14.019 UT.  SN 2000dt
is located at R.A. = 6h10m54s.68, Decl. = +62o01'27".2 (equinox
2000.0), which is 2" west and 16" north of the center of UGC 3411.
The new object appears neither on a CCD image taken by Armstrong on
Sept. 21 (limiting mag 19.5), nor on the following Palomar Sky
Survey images:  1990 Jan. 1 (red, limiting mag 20.8); 1993 Oct. 12
and Dec. 6 (blue, limiting mag 22.5); and 1996 Oct. 16 and Dec. 2
(red, limiting mag 20.8).
     Y. Sato and W. D. Li, University of California at Berkeley, on
behalf of the Lick Observatory Supernova Search (cf. IAUC 6627,
7126), report their independent discovery of SN 2000dt with the
0.8-m Katzman Automatic Imaging Telescope (KAIT) on unfiltered
images taken on Oct. 14.4 (mag about 17.8) and 15.4 UT (mag about
17.9), providing position end figures 54s.68, 27".4 (or 1".3 west
and 15".0 north of the nucleus of UGC 3411).  A KAIT image of the
same field taken on Mar. 21.1 showed nothing at the position of SN
2000dt (limiting mag about 19.0).


COMETS C/1999 U6, C/2000 T3, C/2000 T4 (SOHO)
     Further to IAUC 7445 and 7480, D. Hammer reports measurements
for three more Kreutz sungrazing comets.  All were visible in the
LASCO C2 coronagraph, and C/2000 T4 was also seen in C3 images.
C/1999 U6, C/2000 T3, and C/2000 T4 were found by M. Oates, D.
Biesecker, and J. Danaher, respectively.  The reduced positions and
orbits by B. G. Marsden are given on MPEC 2000-T46.

    Comet         1999 UT           R.A. (2000) Decl.
    C/1999 U6     Oct. 17.910      13 20.8      -10 09

    Comet         2000 UT           R.A. (2000) Decl.
    C/2000 T3     Oct. 11.254      12 58.5      - 7 45
    C/2000 T4          12.071      12 58.4      - 8 15

                      (C) Copyright 2000 CBAT
2000 October 16                (7508)            Daniel W. E. Green

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