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IAUC 7750: 2001fv; CI Aql; SUNGRAZING COMETS

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IAUC number 

                                                  Circular No. 7750
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 2001fv IN NGC 3512
     G. M. Hurst, Basingstoke, England, reports the discovery by M.
Armstrong, Rolvenden, England, of an apparent supernova (mag 16.4)
on an unfiltered CCD image taken on Nov. 3.175 UT in the course of
the U.K. Nova/Supernova Patrol; the object was at mag 16.8 on
images obtained on Nov. 10.16.  SN 2001fv is located at R.A. =
11h04m01s.66, Decl. = +28o01'55".7, which is 21" west and 10".5
south of the center of NGC 3512.  The new object is not present
Armstrong's image from 2000 Dec. 22 (limiting mag 19.0) or on
Palomar Sky Survey images taken on 1955 Mar. 22, 1992 May 2 (blue,
limiting mag 22.5), and 1998 May 21 (red, limiting mag 20.5)


CI AQUILAE
     B. E. Schaefer, University of Texas, Austin, writes that an
outburst of the recurrent nova CI Aql has been found on 12 Harvard
College Observatory archival photographs spanning 1941 May 2-1942
Aug. 4, yielding the following representative B magnitudes:  1941
May 2, 13.8; 24, 14.7; Sept. 11, 14.9; 1942 May 18, 16.5; Aug. 4,
16.65.  The peak brightness may well have been brighter, with few
useful plates in the six months prior to this span.  This
outburst's light curve is similar to that in 2000.  Deep plates
show that the normal magnitude range for this eclipsing binary is
17.0-17.8.  Schaefer suggests that the 1917 discovery could
indicate a recurrence timescale of about 20 yr, with missed
outbursts around 1960 and 1980.


SUNGRAZING COMETS
     Further to IAUC 7746, D. Hammer reports his measurements of
additional sungrazing comets found on SOHO website images by X. M.
Zhou (C/2001 T5), R. Kracht (C/2001 T6), M. Oates (C/2001 T7), and
S. Hoenig (C/2001 U7).  All the objects were seen in the C2
coronagraph except for C/2001 T5 (the only non-Kreutz object, seen
only in C3); C/2001 T7 and C/2001 U7 were also seen in C3.  The
reduced astrometry and orbital elements by B. G. Marsden appear on
the MPECs cited below.

  Comet         2001 UT          R.A. (2000) Decl.       MPEC
  C/2001 T5     Oct. 14.863      13 17.3   - 3 45       2001-V10
  C/2001 T6          15.535      13 14.0   - 9 25       2001-V10
  C/2001 T7           6.513      12 33.0   - 6 07       2001-V19
  C/2001 U7          18.513      13 07.1   -12 16       2001-V31

                      (C) Copyright 2001 CBAT
2001 November 10               (7750)            Daniel W. E. Green

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