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IAUC 9176: C/2010 V1; P/2010 V2

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IAUC number 

                                                  Circular No. 9176
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
New postal address:  Hoffman Lab 209; Harvard University;
 20 Oxford St.; Cambridge, MA  02138; U.S.A.
CBATIAU@EPS.HARVARD.EDU           ISSN 0081-0304
URL http://www.cbat.eps.harvard.edu/index.html
Prepared using the Tamkin Foundation Computer Network


COMET C/2010 V1 (IKEYA-MURAKAMI)
     Further to IAUC 9175, additional astrometry have been reported
and appear on MPEC 2010-V46 with the following preliminary
parabolic orbital elements by B. G. Marsden:

     T = 2010 Oct. 18.817 TT          Peri. = 155.076
                                      Node  =   5.844   2000.0
     q = 1.71541 AU                   Incl. =   8.913

Visual total-magnitude and coma-diameter estimates:  Nov. 4.23 UT,
7.6, 5' (J. J. Gonzalez, Leon, Spain, 10x50 binoculars); Nov. 4.50,
9.0, 3' (A. Hale, Cloudcroft, NM, 10x50 binoculars; low altitude,
zodiacal light); Nov. 4.52, 7.4, 4' (C. W. Hergenrother, Tucson,
AZ, U.S.A., 30x125 binoculars).
     L. Buzzi (Varese, Italy, 0.60-m reflector) reports a round 4'
coma with a tail at least 6' long in p.a. about 300 deg on his CCD
images from Nov. 4.2.  W. H. Ryan (Magdalena Ridge Observatory,
2.4-m reflector) reports a prominent tail in p.a. about 315 deg on
R-band CCD images taken on Nov. 4.5.
     Corrigendum.  On IAUC 9175, line 4, FOR  Toukamachi,  READ
Tohkamachi,


COMET P/2010 V2 (NEAT)
     Comet P/2004 F3 (cf. IAUC 8313) has been recovered on CCD
images obtained at two observatories (initial astrometry tabulated
below).  E. Romas (Rostov-na-Donu, Russia), A. Novichonok
(Kondopoga, Russia), and D. Chestnov (Saransk, Russia) write that
forty stacked 120-s images obtained on Nov. 2.0 UT with the 0.5-m
f/8.3 Maksutov-Cassegrain reflector at the Kislovodsk Mountain
Astronomical Station of Pulkovo Observatory show a round, condensed
coma of diameter 10" and a 7" tail in p.a. 300 deg.  G. Hug
(Scranton, KS, U.S.A.) found the comet to be slightly diffuse on
images taken with a 0.56-m reflector.  The indicated correction to
the prediction on MPC 69908 is Delta(T) = -0.02 day.

     2010 UT             R.A. (2000) Decl.       Mag.   Observer
     Nov.  2.00192    9 36 52.53   +26 27 56.8          Romas
           3.45706    9 37 44.94   +26 29 09.2   20.4   Hug

Additional astrometry, revised orbital elements by B. G. Marsden
(epoch = 2013 Jan. 28.0 TT, T = 2013 Jan. 28.7166 TT, q = 2.879762
AU, e = 0.285069, Peri. = 176.1893 deg, Node = 78.7805 deg, i =
15.9719 deg, equinox 2000.0, P = 8.08 years), residuals, and an
ephemeris appear on MPEC 2010-V47.

                      (C) Copyright 2010 CBAT
2010 November 4                (9176)            Daniel W. E. Green

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