[IAUC] IAUC 9034: 2009 F6 [25139-2009/08-R1]

[IAUC mailing list]

                                                  Circular No. 9034
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS en CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT en 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 2009 F6
     On Apr. 4, R. D. Matson informed the Central Bureau that he
had found a possible comet on ultraviolet SWAN images posted at the
SOHO website, providing the rough positions below, and a search
ephemeris was then posted at the Minor Planet Center's 'NEOCP'
webpage.  Numerous CCD astrometrists and one visual observer have
reported confirmation of the object as a comet, with selected
positions provided below.

     2009 UT             R.A. (2000) Decl.       Mag.   Observer
     Mar. 29         23 03         +51.5                SWAN
          31         23 16         +52.5                  "
     Apr.  1         23 24         +53                    "
           3         23 36         +53                    "
           4         23 46         +54                    "
           6.15      23 54.0       +54 41.5       8.2   Gonzalez
           6.20771   23 54 17.90   +54 42 26.3   14.5   Hormuth
           6.45823   23 56 18.14   +54 47 35.9   13.8   Guido
           6.69785   23 58 12.89   +54 52 24.1   12.0   Kryachko
           6.77483   23 58 50.08   +54 53 56.5   12.7   Ligustri
           6.77945   23 58 51.85   +54 53 59.9          Ikari
           6.80162   23 59 03.04   +54 54 28.3   13.5   Bittesini
           6.80936   23 59 06.91   +54 54 36.7   11.3   Manca
           6.84729   23 59 25.31   +54 55 21.3   13.0   Buzzi

J. J. Gonzalez (Burgos, Spain).  Visual, 15-cm reflector; coma
 diameter 6'.
F. Hormuth (Almeria, Spain).  1.23-m reflector; 1'.5 coma with a
  well-defined core, in twilight.
E. Guido, G. Sostero, and P. Camilleri (Mayhill, NM, U.S.A.).
  Remotely controlled 25-cm f/3.4 reflector; diffuse coma about
  2'.5 in diameter, with a sharp central condensation about 20" in
  diameter.
T. Kryachko, S. Korotkiy, and B. Satovski (Zelenchukskaya).  30-cm
  reflector; bright 118" x 129" coma (major axis in p.a. 252 deg)
 with condensation.
R. Ligustri and P. Beltrame (Talmassons, Italy).  35-cm reflector.
  Coma diameter about 30".
Y. Ikari (Moriyama, Shiga-ken, Japan).  26-cm f/7 reflector; 0'.7
  coma.
L. Bittesini, D. Di Maria, E. Pettarin, and F. Piani (Farra
  d'Isonzo, Italy).  30-cm f/4.5 reflector; coma diameter about 50".
F. Manca and A. Testa (Garbagnate Monastero, Italy).  50-cm
  reflector.
L. Buzzi (Varese, Italy).  60-cm refl.; 1'.5 coma, strong central
  condensation.

                      (C) Copyright 2009 CBAT
2009 April 6                   (9034)            Daniel W. E. Green