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IAUC 7507: P/2000 T2; 2000ds

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                                                  Circular No. 7507
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)

     S. Nakano, Sumoto, Japan, reports the recovery by T. Oribe of
comet P/1993 X1 (= 1993t = 1993 XIX) on CCD frames obtained with
the 1.03-m reflector at Saji Observatory on Oct. 3 and 4.  The
images were clearly cometary with coma diameter 10".  The indicated
correction to the prediction by B. G. Marsden on MPC 31663 was
Delta(T) = -0.04 day, but neither Nakano nor Marsden was able to
obtain a link to the 1993-1995 data without dramatically systematic
residuals, particularly in declination.  Oribe later found faint
images of the comet on frames obtained on Sept. 26.  C. E.
Delahodde, European Southern Observatory, independently recovered
the comet (as a pointlike object measured by A. Maury) with the
Danish 1.54-m reflector on Oct. 8.  A further orbit computation by
Marsden indicated that it was possible to link the 2000 data to the
observations made after the 1994 conjunction.  This computation
revealed that single-night candidates for the comet found by C. W.
Hergenrother, Lunar and Planetary Laboratory, with the 2.3-m
Steward Observatory reflector at Kitt Peak in Sept. and Nov. 1999
indeed belong to the comet, which showed a possible 5" tail in p.a.
270 deg on the first occasion.  Orbital elements satisfactorily
linking the 49 observations during 1994 Dec. 8-1995 June 23 and
1999 Sept. 13-2000 Oct. 8 are given on MPEC 2000-T45, together with
the 1999-2000 observations.

     2000 UT             R.A. (2000) Decl.        m1
     Oct.  3.71875    2 48 34.54   +13 08 08.7   20.2

SUPERNOVA 2000ds IN NGC 2768
     T. Puckett and G. Dowdle, Mountain Town, GA, report the
discovery of an apparent supernova (mag 17.9) on an unfiltered CCD
frame (limiting mag 19.9) taken with the Puckett Observatory 0.60-m
automated supernova patrol telescope on Oct. 10.40 UT.  SN 2000ds
is located at R.A. = 9h11m36s.24, Decl. = +60o01'42".2 (equinox
2000.0), which is 9".1 west and 32".1 south of the center of NGC
2768.  The new object was also present on an unfiltered CCD frame
taken on Oct. 11.38, and it appeared at mag 18.1 on a frame taken
on Oct. 12.34.  SN 2000ds does not appear on unfiltered images
taken by Puckett during 2000 Jan. 6-May 28, and it does not appear
on Palomar Sky Survey images taken on 1996 Mar. 17 (limiting mag
about 21.0) and on 1995 Feb. 5 (limiting mag about 21.0).

                      (C) Copyright 2000 CBAT
2000 October 14                (7507)            Daniel W. E. Green

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