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IAUC 7514: C/2000 U1, C/2000 U2, C/2000 U3, C/2000 U4; 2000dx

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                                                  Circular No. 7514
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)

COMETS C/2000 U1, C/2000 U2, C/2000 U3, C/2000 U4 (SOHO)
     Further to IAUC 7508, D. Biesecker and D. Hammer report the
discoveries of four additional Kreutz sungrazing comets.  All four
were visible in the LASCO C2 coronagraph, and C/2000 U2 and C/2000
U3 were also seen in C3 images.  C/2000 U1 and C/2000 U4 were found
by M. Oates; C/2000 U2 was found by M. Boschat; and C/2000 U3 was
found by J. Danaher.  C/2000 U1 was described as faint, with no
tail evident.  C/2000 U2 was fairly bright, with a long, thin tail.
The measurements were made by Hammer, and the reduced positions and
orbits by B. G. Marsden are given on MPEC 2000-U38.

            C/2000 U1    Oct. 21.393    13 37.0    -11 40
            C/2000 U2         22.279    13 28.6    -13 13
            C/2000 U3         24.029    13 41.4    -14 06
            C/2000 U4         25.076    13 52.6    -13 09

SUPERNOVA 2000dx IN UGC 1775
     M. Schwartz, Cottage Grove, OR; and W. D. Li, A. V. Filippenko,
M. Modjaz, and R. R. Treffers, University of California at Berkeley,
report the discovery of a supernova during a collaboration of the
Lick Observatory Supernova Search (cf. IAUC 6627, 7126) using the
0.8-m Katzman Automatic Imaging Telescope (KAIT) and the Tenagra
Observatory Supernova Search using the 0.8-m Tenagra II and 0.5-m
Tenagra III automated telescopes (hereafter the Lick Observatory
and Tenagra Observatory Supernova Searches, or LOTOSS).  SN 2000dx
was discovered and confirmed with the 0.5-m Tenagra III telescope
on unfiltered images taken on Oct. 30.3 (mag about 17.3) and 31.2
UT (mag about 17.1).  The new object was also confirmed on an
unfiltered KAIT image taken on Oct. 31.3 (mag about 17.1).  SN
2000dx is located at R.A. = 2h18m26s.88, Decl. = +5o39'02".0
(equinox 2000.0), which is 7".9 east and 12".3 south of the
nucleus of UGC 1775.  A KAIT image taken on Oct. 22.3 showed
nothing at the position of SN 2000dx (limiting magnitude about
18.5).  Filippenko and Li add that inspection of CCD spectra (range
330-1000 nm) obtained on Nov. 1 with the Shane 3-m reflector at
Lick Observatory reveals that SN 2000dx is of type Ia, probably a
few days before maximum brightness.

                      (C) Copyright 2000 CBAT
2000 November 1                (7514)            Daniel W. E. Green

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