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IAUC 8760: C/2005 YW; 2006jb; VY Aqr

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IAUC number 

                                                  Circular No. 8760
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 C/2005 YW (LINEAR)
     An apparently asteroidal object discovered by the LINEAR
survey, and designated 2005 YW (discovery observation tabulated
below; cf. MPS 156174, MPEC 2005-Y43, MPO 102263), has been found
to show cometary appearance.  L. Buzzi, Varese, Italy, reports
that 25 co-added 15-s R-band CCD exposures taken with a 0.60-m
reflector on Oct. 11.16-11.17 UT show a bright and condensed coma
of diameter 15" and a wide tail of length about 40" in p.a. 300
deg.  E. Guido and G. Sostero report that CCD frames taken remotely
on Oct. 11.49-11.50 with a 0.25-m f/3.4 reflector near Mayhill, NM,
show a coma of mag 14.7-15.5 with diameter about 15" and a broad
tail 25" long toward p.a. 310 deg.  R. Ligustri, Udine, Italy,
reports that his CCD exposures taken in twilight on Oct. 12.2 with
a 0.35-m f/5 reflector show a 30" coma and a 45" tail in p.a. 328
deg.  G. Masi and S. Foglia, Ceccano, Italy, report that CCD frames
taken through clouds on Oct. 12.2 with a 0.28-m f/5 reflector show
the object to have a 20" coma of mag about 15.

     2005 UT             R.A. (2000) Decl.       Mag.
     Dec. 21.27039    5 56 08.80   +55 10 37.0   19.9

Additional astrometry, the following orbital elements, and an
ephemeris appear on MPEC 2006-T62:

                    Epoch = 2006 Dec. 11.0 TT
     T = 2006 Dec.  7.8494 TT         Peri. = 234.6340
     e = 0.989538                     Node  = 302.2144  2000.0
     q = 1.993023 AU                  Incl. =  40.5438


SUPERNOVA 2006jb IN UGC 12897
     Further to IAUC 8758, N. Joubert and W. Li report the LOSS
discovery of an apparent supernova on unfiltered KAIT images taken
on Oct. 11.25 (at mag 17.4) and 12.29 UT (mag 17.5).  The new
object is located at R.A. = 0h00m37s.55, Decl. = +28o23'02".9
(equinox 2000.0), which is 4".5 west and 1".6 south of the nucleus
of UGC 12897.  A KAIT image taken on Sept. 23.32 showed nothing at
this position (limiting mag 19.1).


VY AQUARII
     CBET 664 contains details of the first reported outburst of VY
Aqr in 12 years (at mag about 11 on Oct. 7).

                      (C) Copyright 2006 CBAT
2006 October 12                (8760)            Daniel W. E. Green

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