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IAUC 9079: V1647 Ori; P/2009 QG_31, 226P,, 227P; C/2009 F10, C/2009 G2-G6

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                                                  Circular No. 9079
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)


V1647 ORIONIS
     C. Aspin, Institute for Astronomy, University of Hawai'i (UH);
C. Briceno, J. Downes, F. Hernandez, and R. Rojas, Venezuela
National Astronomical Observatory (VNAO); and M. Nakano, Oita
University, Japan, report the following optical observations from
the VNAO 1-m Stock Telescope (in V and I bands) and the UH 2.2-m
telescope on Mauna Kea (in r' and i' bands).  On Sept. 11 UT, the
young eruptive variable star V1647 Ori -- emerging from conjunction
with the sun -- was observed to have magnitudes V = 18.00 +/- 0.15,
I = 14.55 +/- 0.03, and V-I = +3.45 +/- 0.17.  On Sept. 12 UT,
V1647 Ori had magnitudes r' = 17.69 +/- 0.05, i' = 15.85 +/- 0.05,
and r'-i' = +1.84 +/- 0.07.  These values are close to the maximum
values reached by V1647 Ori both soon after outburst in February
2004 (cf. IAUCs 8354, 8396, 8600) and during its subsequent
brightening in September 2008 (cf. IAUCs 8968, 8969).


COMETS P/2009 QG_31, 226P, AND 227P
     Comet P/2009 QG_31 (cf. IAUC 9078) has been given the name "La
Sagra" by the Committee on Small Bodies Nomenclature.  Comet P/2009
R2 (= P/1783 W1 = P/2003 A1; cf. IAUCs 9072, 9073) has been
assigned the permanent number 226P.  Comet P/2009 S4 (= P/2004
EW_38; cf. IAUC 9077) has been assigned the permanent number 227P.


COMETS C/2009 F10, C/2009 G2-G6 (SOHO)
     Further to IAUC 9077, additional Kreutz sungrazers have been
found on SOHO website images.  All were very diffuse except for
C/2009 G2 (which was small and elongated, with a short, faint tail)
and C/2009 G3 (which was small and condensed, peaking at mag about
7 in C3 images, though C2 images showed it to have a hint of a tail
and a 'lump' suggestive of possible fragmenting).  Approximate peak
magnitudes in C2 images:  C/2009 F10, 8-8.5; C/2009 G2, 7; C/2009
G4, 8.5; C/2009 G5 and C/2009 G6, 8.

 Comet        2009 UT       R.A.(2000)Decl.   Inst.  F    MPEC
 C/2009 F10   Mar. 30.038    0 43.5  + 3 09   C2     MU   2009-N29
 C/2009 G2    Apr.  2.104    0 52.4  + 3 52   C2     HS   2009-N30
 C/2009 G3          2.113    1 04.4  + 3 47   C3/2   BZ   2009-N30
 C/2009 G4          4.646    1 03.9  + 5 13   C2     AK   2009-N30
 C/2009 G5          6.963    1 12.1  + 6 02   C2     HS   2009-N30
 C/2009 G6         10.329    1 24.6  + 7 11   C2     BZ   2009-N30

                      (C) Copyright 2009 CBAT
2009 October 9                 (9079)            Daniel W. E. Green

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