Electronic Telegram No. 3541
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/2013 L1 = P/2006 R2 (CHRISTENSEN)
     J. V. Scotti, Lunar and Planetary Laboratory, University of Arizona,
reports his recovery of comet P/2006 R2 (cf. IAUC 8748) on CCD images taken
with the Spacewatch 1.8-m telescope (+ Finger Lakes ProLine PL3041-LC camera
+ Schott OG-515 filter; bandpass 515-950 nm) at Kitt Peak.  Nine stacked
120-s images show only faint stellar image near the limit.

     2013 UT             R.A. (2000) Decl.       Mag.   Observer
     June  1.29149   15 11 01.89   + 4 07 37.6   22.1   Scotti
           1.30452   15 11 01.43   + 4 07 36.8   22.3     "
           1.31759   15 11 00.96   + 4 07 36.8   22.0     "
           4.28331   15 09 26.07   + 4 06 42.8   21.7     "
           4.29634   15 09 25.66   + 4 06 42.4   22.2     "
           4.30939   15 09 25.26   + 4 06 42.3   21.5     "

The indicated correction to the prediction by B. G. Marsden on MPC 75735
is Delta(T) = -0.78 day.  The following linked orbital elements (from 124
observations spanning 2006 Aug. 30-2013 June 4; mean residual 0".6) by
G. V. Williams and an ephemeris appear on MPEC 2013-L19.

                    Epoch = 2014 Dec.  9.0 TT
     T = 2014 Dec. 28.44531 TT        Peri. = 189.08497
     e = 0.2692195                    Node  = 139.05815 2000.0
     q = 3.0540581 AU                 Incl. =  16.30054
       a =  4.1791727 AU   n = 0.11536355   P =   8.54 years


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2013 CBAT
2013 June 4                      (CBET 3541)              Daniel W. E. Green