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IAUC 7613: COMET P/2001 H5 (NEAT); SUNGRAZING COMETS

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IAUC number 

                                                  Circular No. 7613
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)


COMET P/2001 H5 (NEAT)
     E. F. Helin, S. Pravdo, and K. Lawrence, Jet Propulsion
Laboratory, report the discovery of a comet (discovery observation
given below) on CCD images taken with the 1.2-m Oschin Schmidt
telescope at Palomar in the course of the NEAT program.  CCD images
taken on Apr. 25.0 UT by M. Tichy and M. Kocer at Klet (0.57-m
f/5.2 reflector) show the diffuse object to have a coma diameter of
9".  C. E. Lopez reports that CCD observations obtained on Apr.
25.2 at El Leoncito (0.5-m f/7.5 double astrograph) also show the
object to be diffuse.  Additional astrometry (including LINEAR
prediscovery observations on Mar. 20 identified by B. G. Marsden)
and orbital elements (T = 2001 Jan. 27.0 TT, q = 2.390 AU, i = 8.4
deg, P = 15.0 yr) are given on MPEC 2001-H37.

     2001 UT             R.A. (2000) Decl.        m1
     Apr. 24.35457   14 43 27.88   -29 40 59.0   16.8


SUNGRAZING COMETS
     Further to IAUC 7612, D. Hammer and D. Biesecker report
measurements by Hammer for several additional sungrazing comets
found with SOHO, with all but C/2001 E1 being of Kreutz type.  The
reduced observations and orbital elements by B. G. Marsden appear
on the MPECs cited below.  Comets C/2001 F2, C/2001 G2, and C/2001
H1 were detected with both the C2 and C3 coronagraphs, while the
remaining comets were visible only with C2.  The comets were found
at the SOHO website by M. Boschat (C/2001 F2), S. Hoenig (C/2001
G2), T. Scarmato (C/2001 H2), X. Leprette (C/2001 H2, C/2001 H3,
C/2001 H4), and M. Oates (remaining comets).  C/2001 G2 saturated
the C2 images (though the comet was partially obscured by the
occulting pylon).  C/2001 G3 was very faint.

  Comet         2001 UT          R.A. (2000) Decl.       MPEC
  C/2001 E1     Mar. 15.561      23 44.7   - 0 11       2001-F52
  C/2001 F2          25.988       0 44.8   + 0 45       2001-F55
  C/2001 G2     Apr.  7.540       1 30.5   + 5 10       2001-G34
  C/2001 G3          10.729       1 24.6   + 7 20       2001-G34
  C/2001 H1          20.096       2 00.5   + 9 31       2001-H32
  C/2001 H2          20.479       2 00.4   +10 42       2001-H32
  C/2001 H3          20.439       2 00.5   +10 39       2001-H32
  C/2001 H4          20.579       2 00.5   +10 41       2001-H32

                      (C) Copyright 2001 CBAT
2001 April 25                  (7613)            Daniel W. E. Green

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