Central Bureau for Astronomical Telegrams

Central Bureau for Astronomical Telegrams -- Image credits

IAUC 8609: C/2005 S4; (3982); C/2005 O2

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 8608 SEARCH Read IAUC 8610

View IAUC 8609 in .dvi, .ps or .PDF format.
IAUC number 

                                                  Circular No. 8609
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://cfa-www.harvard.edu/iau/cbat.html  ISSN 0081-0304
Phone 617-495-7440/7244/7444 (for emergency use only)


COMET C/2005 S4 (McNAUGHT)
     R. H. McNaught, Australian National University, reports his
discovery of a comet on CCD images taken with the 0.5-m Uppsala
Schmidt telescope in the course of the Siding Spring Survey
(discovery observation tabulated below); 120-s exposures taken on
Oct. 1.6 UT clearly show a tail about 8" long in p.a. about 135 deg
(the discovery images on Sept. 30.6 show the comet as slightly
diffuse).

     2005 UT             R.A. (2000) Decl.       Mag.
     Sept.30.55673   22 06 03.85   -37 48 49.1   18.9

The available astrometry (including prediscovery Uppsala Schmidt
images back to July 27), the following parabolic orbital elements,
and an ephemeris appear on MPEC 2005-T12.

     T = 2007 July 18.0603 TT         Peri. =  31.3980
                                      Node  = 318.2820  2000.0
     q = 5.851768 AU                  Incl. = 107.9924


(3982) KASTEL
     P. Pravec and P. Kusnirak, Ondrejov Observatory; L. Kornos and
J. Vilagi, Modra Observatory; D. Pray, Coventry, RI; R. Durkee,
Minneapolis, MN; and W. Cooney, J. Gross and D. Terrell, Sonoita
Research Observatory, AZ, report that photometric observations
obtained during Sept. 24-29 reveal that (3982) has a lightcurve
consisting of two linearly additive components with periods 8.488
and 5.835 (or possibly 2.918) hr and amplitudes 0.27 and 0.08 mag,
respectively.  No attenuations due to occultations/eclipses were
seen, so the proposed interpretation of binary nature of the
minor planet needs to be confirmed with further observations.


COMET C/2005 O2 (CHRISTENSEN)
     Improved parabolic orbital elements from MPEC 2005-S57:

     T = 2005 Sept. 8.4476 TT         Peri. = 263.8330
     e = 0.859426                     Node  = 280.7698  2000.0
     q = 3.333580 AU                  Incl. = 148.8919
       a = 23.714057 AU    n = 0.0085348    P = 115.5 years

                      (C) Copyright 2005 CBAT
2005 October 1                 (8609)            Daniel W. E. Green

Read IAUC 8608 SEARCH Read IAUC 8610

View IAUC 8609 in .dvi, .ps or .PDF format.

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

Valid HTML 4.01!