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IAUC 8779: P/2006 W4; 2006or, 2006os, 2006ot

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                                                  Circular No. 8779
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 P/2006 W4 (HILL)
     R. E. Hill reports the discovery of a comet in the course of
the Catalina Sky Survey (discovery observation below), the object
noted as having a tail about 15" long to the west-northwest.
Following posting on the Minor Planet Center's 'NEOCP' webpage, the
object has been found to show cometary appearance by other CCD
observers, including G. Hug (Eskridge, KS, 0.7-m reflector, Nov.
23.2 UT; diffuse with a slight coma extension in p.a. about 310
deg) and P. Birtwhistle (Great Shefford, Berkshire, England, 0.40-m
reflector, Nov. 24.0; very concentrated, almost-stellar coma of
diameter 6" with a tail about 6" wide and 30" long in p.a. 285 deg).

     2006 UT             R.A. (2000) Decl.       Mag.
     Nov. 22.33647    3 11 58.56   +26 23 11.9   19.3

The available astrometry, the following preliminary elliptical
orbital elements, and an ephemeris appear on MPEC 2006-W67.

     T = 2008 Feb. 29.798 TT          Peri. = 216.177
     e = 0.29858                      Node  = 247.097   2000.0
     q = 4.54345 AU                   Incl. =  27.277
       a =  6.47755 AU     n = 0.059784     P =  16.5 years


SUPERNOVAE 2006or, 2006os, 2006ot
     Three type-Ia supernovae have been found on unfiltered CCD
images:  2006or in NGC 3891 by T. Puckett and A. Kroes (cf. IAUC
8778), 2006os in UGC 2384 by R. Quimby and F. Castro (cf. IAUC
8754), and 2006ot in ESO 544-G31 by N. Joubert and W. Li (LOSS/KAIT;
cf. IAUC 8771).

SN      2006 UT      R.A.  (2000.0)  Decl.    Mag.     Offset
2006or  Nov. 18.41  11 48 03.47  +30 21 24.0  16.3  1".0 E, 10".7 S
2006os  Nov. 21.18   2 55 01.01  +16 00 34.8  17.2  6".2 E, 10".4 S
2006ot  Nov. 22.28   2 15 04.84  -20 45 58.2  17.4  3".3 E, 5".4 N

Additional magnitudes for 2006or:  2005 Dec. 3 UT, [19.1; 2006 Nov.
21.40, 16.3.  SN 2006or was approximately 5 days past maximum on
Nov. 22.5 (details on CBET 750).  SN 2006os is near maximum
brightness (cf. CBET 751).  SN 2006ot was not present on a KAIT
image taken on Oct. 20.39 (limiting mag 18.5).  SN 2006ot is prior
to maximum light (details on CBET 754).

                      (C) Copyright 2006 CBAT
2006 November 24               (8779)            Daniel W. E. Green

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