Electronic Telegram No. 2944
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
CBAT Director:  Daniel W. E. Green; Hoffman Lab 209; Harvard University;
 20 Oxford St.; Cambridge, MA  02138; U.S.A.
e-mail:  cbatiau@eps.harvard.edu (alternate cbat@iau.org)
URL http://www.cbat.eps.harvard.edu/index.html
Prepared using the Tamkin Foundation Computer Network


COMET P/2011 Y1 = P/2006 T1 (LEVY)
     An object found by the Mt. Lemmon Survey and posted on the Minor
Planet Center's NEOCP webpage has been found to show cometary appearance by
CCD astrometrists elsewhere.  E. Pettarin (Farra d'Isonzo, Italy; 0.40-m f/4.5
reflector) notes that a central condensation is surrounded by a diffuse coma
that is elongated in p.a. 50 deg.  P. Birtwhistle (Great Shefford, Berkshire,
England; 0.40-m f/6 Schmidt-Cassegrain reflector) writes that the object was
diffuse and difficult to measure, with a coma diameter of 12" and a poorly
concentrated center 4" in diameter; a tail extends 14" in p.a. 50 deg.  This
appears to be a recovery of comet P/2006 T1 (cf. IAUCs 8757, 8762), with the
indicated correction to the prediction on MPC 75514 being Delta(T) = +2.4 days.
The new available observations are given below:

     2011 UT             R.A. (2000) Decl.       Mag.   Observer
     Dec. 17.06325   23 05 56.18   +26 59 18.2   19.8   Mt. Lemmon
          17.06519   23 05 56.61   +26 59 16.0   20.1     "
          17.06719   23 05 56.90   +26 59 12.9   19.6     "
          17.72689   23 07 51.72   +26 44 34.5   19.1   Pettarin
          17.74935   23 07 55.80   +26 44 02.2          Birtwhistle
          17.75524   23 07 56.49   +26 43 55.5   19.6   Pettarin
          17.78187   23 08 01.27   +26 43 18.0          Birtwhistle
          17.89481   23 08 20.80   +26 40 44.3   19.9     "
          17.90425   23 08 22.39   +26 40 31.6   19.3     "

Linked orbital elements by G. V. Williams from 262 observations, 2006
Oct. 2-2011 Dec. 17:

                    Epoch = 2012 Feb.  3.0 TT
     T = 2012 Jan. 14.93632 TT        Peri. = 179.62724
     e = 0.6682595                    Node  = 279.74496 2000.0
     q = 1.0074539 AU                 Incl. =  18.26398
       a =  3.0368732 AU   n = 0.18623619   P =   5.29 years


NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2011 CBAT
2011 December 18                 (CBET 2944)              Daniel W. E. Green