IAU Central Bureau for Astronomical Telegrams

Central Bureau for Astronomical Telegrams -- Image credits

IAUC 8859: P/2007 O2 = P/1998 U2; R CrB

The following International Astronomical Union Circular may be linked-to from your own Web pages, but must not otherwise be redistributed (see these notes on the conditions under which circulars are made available on our WWW site).


Read IAUC 8858  SEARCH Read IAUC 8860

View IAUC 8859 in .dvi, .ps or .PDF format.
IAUC number


                                                  Circular No. 8859
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 P/2007 O2 = P/1998 U2 (MUELLER)
     L. Buzzi and F. Luppi, Varese, Italy, report the recovery of
comet P/1998 U2 (cf. IAUC 7035, 7036), being slightly diffuse on
CCD images obtained with a 0.60-m reflector, with confirming CCD
images by P. Birtwhistle (Great Shefford, Berkshire, U.K., 0.40-m
reflector).

     2007 UT             R.A. (2000) Decl.       Mag.   Observer
     July 26.09058    3 48 28.53   +21 41 05.3   19.5   Buzzi
          26.10107    3 48 29.86   +21 41 09.8            "
          27.10651    3 50 39.81   +21 48 37.6          Birtwhistle
          27.11524    3 50 40.92   +21 48 43.8   19.5     "

The indicated correction to the predictions in the 2007 Comet
Handbook and on MPC 51823 is Delta(T) = +0.3 day.  The following
orbital elements by B. G. Marsden are from 153 observations,
1998-2007 (mean residual 0".6):

                    Epoch = 1998 Nov.  3.0 TT
     T = 1998 Oct. 20.75954 TT        Peri. =  49.53569
     e = 0.5215660                    Node  = 336.22405 2000.0
     q = 2.0253092 AU                 Incl. =   2.19329
       a =  4.2332052 AU   n = 0.11316187   P =   8.71 years

                    Epoch = 2007 June 29.0 TT
     T = 2007 July  8.20087 TT        Peri. =  49.73116
     e = 0.5206516                    Node  = 336.11998 2000.0
     q = 2.0319152 AU                 Incl. =   2.18993
       a =  4.2389107 AU   n = 0.11293347   P =   8.73 years


R CORONAE BOREALIS
     E. Broens, Vereniging Voor Sterrenkunde, Belgium, reports that
this variable has begun to fade slowly for the first time since
Feb.-May 2003 (cf. IAUC 8077), when it faded over about 20 days
from a visual mag about 6.1 to minimum at mag about 12.7.  Visual
magnitude estimates (non-Belgian data sent directly to the Central
Bureau):  June 21.94 UT, 6.0 (E. Muyllaert, Oostende, Belgium);
July 7.93, 6.3 (Muyllaert); 13.85, 6.5 (F. Van Loo, Genk, Belgium);
16.878, 7.1 (S. Baroni, Milan, Italy); 17.837 7.2 (S. Foglia,
Novara, Italy); 18.909, 7.0 (K. Hornoch, Vohancice, Czech Republic);
19.896, 7.0 (Baroni); 20.96, 7.1 (E. Broens, Mol, Belgium); 22.881,
7.3 (Hornoch); 24.862, 7.6 (Foglia); 24.920, 7.4 (Hornoch).

                      (C) Copyright 2007 CBAT
2007 July 27                   (8859)            Daniel W. E. Green

Read IAUC 8858  SEARCH Read IAUC 8860

View IAUC 8859 in .dvi, .ps or .PDF format.


Our Web policy. Index to the CBAT/MPC/ICQ pages.


Valid HTML 4.01!