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IAUC 8528: C/2005 J2; P/2005 JN

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IAUC number 

                                                  Circular No. 8528
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 J2 (CATALINA)
     An apparently asteroidal object discovered by the Catalina Sky
Survey (discovery position below), and placed on the 'NEO
Confirmation Page', was reported by J. Young (Table Mountain
Observatory, 0.6-m reflector + CCD) on May 13.3 UT as being 3"
across and possibly cometary, although this was far from certain
because of extensive cirrus.  Marginal-quality 60-second exposures
at 1.7 airmasses by E. Beshore (Mount Lemmon Survey, 1.5-m
reflector + CCD) on May 14.2 UT showed a possible faint coma 5"-7"
across and a faint tail about 10" long in p.a. about 100 deg.

     2005 UT             R.A. (2000) Decl.       Mag.   Observer
     May  12.16068   11 35 53.42   -13 12 58.1   18.9   Catalina

The available astrometry, the following preliminary parabolic
orbital elements, and an ephemeris are given on MPEC 2005-K01.

     T = 2005 Mar. 30.743 TT          Peri. = 198.905
                                      Node  =  33.360   2000.0
     q = 4.28168 AU                   Incl. = 150.790


COMET P/2005 JN (SPACEWATCH)
     An apparently asteroidal object reported by the Spacewatch
program (discovery observation below, cf. MPS 133394) has been
found to show a coma with diameter 6" and a 20" tail in p.a. 145
deg on R-band CCD frames taken by C. W. Hergenrother (Lunar and
Planetary Laboratory) with the University of Arizona 1.54-m Kuiper
reflector at Catalina on May 12.1 UT.

     2005 UT             R.A. (2000) Decl.       Mag.
     May   3.20314   13 22 55.34   + 2 13 14.9   20.4

The most recent astrometry, the following elliptical orbital
elements, and an ephemeris appear on MPEC 2005-K11.

     T = 2005 June 20.7004 TT         Peri. = 153.7724
     e = 0.349979                     Node  =  70.8036  2000.0
     q = 2.274666 AU                  Incl. =   8.8549
       a =  3.499375 AU    n = 0.1505630    P =   6.55 years

                      (C) Copyright 2005 CBAT
2005 May 16                    (8528)            Daniel W. E. Green

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