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IAUC 8618: P/2005 SD; P/2005 S2; P/2005 S3

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IAUC number 

                                                  Circular No. 8618
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 P/2005 SD (LINEAR)
     An apparently asteroidal object discovered by the LINEAR
project (cf. MPEC 2005-S17, MPS 142263; discovery observation below)
has been found to show a small condensed coma with a fanlike
extension to the northwest on CCD frames taken by R. Naves and M.
Campas (0.30-m reflector, Barcelona; Oct. 6.9 UT) and by T. Climent
(0.25-m reflector, Alginet, Spain; Oct. 15.9), as reported by M.
Kidger, Instituto de Astrofisica de Canarias.  Kidger adds that an
image taken by E. Reina (Barcelona) on Oct. 8.9 also shows a
possible short double tail in p.a. 0 deg and 300 deg.

     2005 UT             R.A. (2000) Decl.       Mag.
     Sept.16.30101    0 37 55.15   +44 22 09.5   17.3

The following orbital elements are taken from MPEC 2005-U01:

                    Epoch = 2005 Aug. 18.0 TT
     T = 2005 Nov. 16.4290 TT         Peri. =  91.1684
     e = 0.497274                     Node  = 313.9150  2000.0
     q = 1.575269 AU                  Incl. =  21.1390
       a =  3.133458 AU    n = 0.1776922    P =   5.55 years


COMET P/2005 S2 (SKIFF)
     Improved elliptical orbital elements from MPEC 2005-T76:

                    Epoch = 2006 July  4.0 TT
     T = 2006 June 29.0656 TT         Peri. = 229.8241
     e = 0.196734                     Node  = 161.2691  2000.0
     q = 6.398388 AU                  Incl. =   3.1408
       a =  7.965465 AU    n = 0.0438417    P =  22.5 years


COMET P/2005 S3 (READ)
     Improved orbital elements from MPEC 2005-U07:

     T = 2006 Jan. 10.507 TT          Peri. = 140.958
     e = 0.42059                      Node  = 273.428   2000.0
     q = 2.84198 AU                   Incl. =   3.481
       a =  4.90498 AU     n = 0.090729     P =  10.9 years

                      (C) Copyright 2005 CBAT
2005 October 17                (8618)            Daniel W. E. Green

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