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IAUC 8916: C/2008 C1; EDITORIAL NOTICE

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                                                  Circular No. 8916
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://www.cfa.harvard.edu/iau/cbat.html  ISSN 0081-0304
Phone 617-495-7440/7244/7444 (for emergency use only)


COMET C/2008 C1 (CHEN-GAO)
     The times of the Jan. 30 and 31 observations published on IAUC
8915 were given in error by the Chinese observers; the correct
times, along with more careful measurements of position, are
provided below.

     2008 UT             R.A. (2000) Decl.       Mag.
     Jan. 30.58240   22 51 06.89   +62 15 22.0   15.4
          31.59073   22 57 05.01   +62 14 39.3   15.7
     Feb.  1.66713   23 03 33.84   +62 13 07.1   16.0
           2.64737   23 09 33.45   +62 11 19.2   16.6

The following revised parabolic orbital elements are taken from
MPEC 2008-C21.

     T = 2008 Apr. 16.835 TT          Peri. = 180.956
                                      Node  = 307.802   2000.0
     q = 1.26166 AU                   Incl. =  61.775

     Visual total-magnitude and coma-diameter estimates:  Feb. 3.74
UT, 13.3, 0'.8 (M. Lehky, Hradec Kralove, Czech Republic, 0.42-m
reflector); 3.76, 12.9, 0'.3 (W. Hasubick, Buchloe, Germany, 44-cm
reflector); 3.86, 13.5, 0'.7 (V. Nevski, Vitebsk, Belarus, 0.3-m
reflector); 4.89, 12.8, 1'.2 (J. J. Gonzalez, Asturias, Spain,
0.20-m reflector).


EDITORIAL NOTICE
     Subscribers to the printed IAU Circulars and to the electronic
IAUCs and CBETs are advised that, effective 2008 Mar. 1, paid
subscriptions will no longer be an option at the 18-month level.
To reduce complications, the maximum allowed subscription term after
March 1 will be 12 months.  We apologize for the sudden inability
in Dec. 2007 to process credit-card payments; a new procedure for
processing credit-card payments is being sought, but this could
take some months.  In the meantime, subscribers are requested to
send checks (or postal money orders) payable in U.S. dollars and
drawn on U.S. banks; bank "wire" transfers of money are also
possible, but are less desirable because they are more complicated
for the CBAT to process, and subscribers doing bank transfers must
add $20.00 to cover bank fees incurred by the Smithsonian
Institution.

                      (C) Copyright 2008 CBAT
2008 February 5                (8916)            Daniel W. E. Green

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