Electronic Telegram No. 3971
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/2014 R2 = P/2001 Q11 (NEAT)
     E. J. Christensen reports the recovery of comet P/2001 Q11 (cf. IAUC
9129) on CCD images taken with the Mount Lemmon 1.5-m reflector (astrometry
tabulated below), the object appearing slightly diffuse with an asymmetric
coma about 5" in size, elongated toward the west.  After the object was
posted on the Minor Planet Center's PCCP webpage, S. Nakano (Sumoto, Japan)
reported that although H. Sato (Tokyo) was initially unable to find this comet
on CCD images obtained on July 28.8 UT using a 0.51-m f/6.8 astrograph (+
luminance filter) at Siding Spring, Sato has now subsequently identified it as
a very faint spot on ten stacked 60-s exposures.

     2014 UT             R.A. (2000) Decl.       Mag.   Observer
     July 28.81688    4 01 08.36   + 3 23 10.5          Sato
          28.82208    4 01 08.87   + 3 23 09.1   21.3     "
     Sept. 6.45148    5 02 09.48   + 0 42 44.5   20.9   Christensen
           6.45693    5 02 09.87   + 0 42 42.7   21.1     "
           6.46184    5 02 10.19   + 0 42 41.1   21.1     "

Nakano adds that the positions correspond to a correction of Delta(T) =
-0.68 day with regard to his prediction in the ICQ 2013 Comet Handbook.
Additional astrometry, the following linked orbital elements by G. V.
Williams (from 29 observations spanning 2001 Aug. 18-2014 Sept. 7; mean
residual 0".5), and an ephemeris appear on MPEC 2014-R91.  Elements for
the missed return in 2007 are also listed below.

                    Epoch = 2007 Dec.  6.0 TT
     T = 2007 Nov. 23.9348 TT         Peri. = 207.1717
     e = 0.434250                     Node  = 144.9995  2000.0
     q = 1.949247 AU                  Incl. =  19.8647
       a =  3.445424 AU    n = 0.1541133    P =   6.40 years

                    Epoch = 2014 Apr. 13.0 TT
     T = 2014 Apr. 22.46513 TT        Peri. = 207.39903
     e = 0.4333982                    Node  = 144.91821 2000.0
     q = 1.9542005 AU                 Incl. =  19.84652
       a =  3.4489838 AU   n = 0.15387474   P =   6.40 years


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2014 CBAT
2014 September 12                (CBET 3971)              Daniel W. E. Green