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IAUC 9083: COMET C/2009 T3 (LINEAR); C/2009 H4-H8

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IAUC number 

                                                  Circular No. 9083
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://www.cfa.harvard.edu/iau/cbat.html  ISSN 0081-0304
Phone 617-495-7440/7244/7444 (for emergency use only)


COMET C/2009 T3 (LINEAR)
     An apparently asteroidal object discovered by the LINEAR
project (discovery observation tabulated below), and posted on the
Minor Planet Center's 'NEOCP' webpage, has been found to show
cometary appearance by other CCD astrometrists.  L. Buzzi, Varese,
Italy, writes that images taken in moderate seeing with a 0.60-m
reflector on Oct. 15.1 UT show a 12" coma that appears slightly
elongated to the southwest, but with no clear tail.  E. Guido,
Castellammare di Stabia, Italy, reports that twenty co-added 120-s
images taken remotely by G. Sostero and himself on Oct. 15.4 with a
0.25-m reflector near Mayhill, NM, U.S.A., show a coma nearly 12"
in diameter, slightly elongated toward the southwest.  W. H. Ryan
(Magdalena Ridge Observatory 2.4-m reflector) reports a tail at p.a.
about 270 deg on images taken during Oct. 15.44-15.45.  R. Miles
(2.0-m 'Faulkes Telescope North' at Haleakala, Oct. 15.5) reports a
very diffuse coma of diameter 15", offset in p.a. approximately 260
deg.

     2009 UT             R.A. (2000) Decl.       Mag.   Observer
     Oct. 14.43092    5 25 15.46   +22 02 04.2   19.3   LINEAR

The available astrometry, the following preliminary parabolic
orbital elements, and an ephemeris appear on MPEC 2009-T56.

     T = 2010 Jan.  7.101 TT          Peri. =  29.977
                                      Node  =  60.216   2000.0
     q = 2.32307 AU                   Incl. = 148.582


COMETS C/2009 H4-H8 (SOHO)
     Further to IAUC 9080, additional Kreutz sungrazers have been
found on SOHO website images.  C/2009 H4 was small, slightly
diffuse, and slightly elongated (peak mag about 8).  C/2009 H5 was
diffuse with a short, faint tail (mag about 7.5).  C/2009 H6 (mag
about 7), C/2009 H7 (mag about 8.5), and C/2009 H8 (mag about 7-7.5)
were all small and stellar in appearance.

 Comet        2009 UT       R.A.(2000)Decl.   Inst.  F    MPEC
 C/2009 H4    Apr. 19.476    1 56.9  +10 16   C2     MK   2009-N33
 C/2009 H5         22.351    2 03.9  +10 50   C2     BZ   2009-N34
 C/2009 H6         23.976    2 12.8  +11 43   C2     BZ   2009-N34
 C/2009 H7         24.243    2 14.1  +11 46   C2     RK   2009-N34
 C/2009 H8         24.471    2 22.5  +11 00   C3     RM   2009-N34

                      (C) Copyright 2009 CBAT
2009 October 15                (9083)            Daniel W. E. Green

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