IAU Electronic Telegram No. 4237

Central Bureau for Astronomical Telegrams
Mailing address: 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/2016 A4 = P/2001 F1 (NEAT)
     Comet P/2001 F1 (cf. IAUC 7604) has been recovered via observations
obtained by two groups at two different observatories, as follows (with
recovery astrometry tabulated below).  K. Sarneczky, Konkoly Observatory; and
S. Kurti, Nove Zamky, Slovakia, reported their possible recovery on unfiltered
CCD exposures taken by P. Szekely (University of Szeged, Hungary) with the
0.60-m Schmidt telescope at the Piszkesteto Station of Konkoly Observatory on
Jan. 7.9 UT, with the head noted as being nearly stellar in appearance, with a
very faint 15" tail toward p.a. 265 degrees in twelve stacked 150-s exposures.
E. Schwab, Egelsbach, Germany, also reports a recovery of comet P/2001 F1 on
CCD images obtained on Jan. 10.1 by P. Ruiz with a 1.0-m f/4.4 reflector at
the European Space Agency's Optical Ground Station, Tenerife (with measurement
assistance stated also by M. Micheli, D. Koschny, A. Knoefel, and M. Busch);
the comet showed no coma, but there is a tail about 10" long in p.a. 270 deg.

     2016 UT             R.A. (2000) Decl.       Mag.   Observer
     Jan.  7.89793    7 53 48.36   +29 38 53.6   20.1   Szekely
           7.90579    7 53 48.06   +29 38 55.8   20.4     "
           7.91366    7 53 47.79   +29 38 57.7   20.1     "
          10.09736    7 52 31.44   +29 48 06.6   19.8   Ruiz
          10.10494    7 52 31.16   +29 48 08.7   19.9     "
          10.11251    7 52 30.91   +29 48 10.5   19.8     "

The indicated correction to the prediction by S. Nakano in the ICQ's 2014
Comet Handbook is Delta(T) = -0.36 day.  The following linked orbital
elements by G. V. Williams and an ephemeris appear on MPEC 2016-A105.

                    Epoch = 2017 May   6.0 TT
     T = 2017 May   5.31831 TT        Peri. =  80.51548
     e = 0.3595748                    Node  =  92.65308 2000.0
     q = 4.1845423 AU                 Incl. =  19.05406
       a =  6.5340064 AU   n = 0.05901124   P =  16.70 years


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2016 CBAT
2016 January 11                  (CBET 4237)              Daniel W. E. Green