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IAUC 8525: P/2005 J1; V1187 Sco; C/1997 J5

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IAUC number

                                                  Circular No. 8525
Central Bureau for Astronomical Telegrams
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
URL http://cfa-www.harvard.edu/iau/cbat.html  ISSN 0081-0304
Phone 617-495-7440/7244/7444 (for emergency use only)

     R. H. McNaught reports his discovery of a comet with the 0.5-m
Uppsala Schmidt telescope in the course of the Siding Spring
Survey; the discovery images (initial observation provided below)
show the object as diffuse, and images taken on May 5.7 UT show it
to be slightly diffuse with a faint tail about 10" long to the
west.  Following posting on the 'NEO Confirmation Page', A. C.
Gilmore reports that CCD images taken on May 5.5-5.7 with the Mt.
John 1.0-m reflector show the object to be slightly more diffuse
than the images of surrounding stars.

     2005 UT             R.A. (2000) Decl.       Mag.
     May   3.72216   20 15 57.78   -28 50 37.9   17.6

The available astrometry, the following preliminary elliptical
orbital elements, and an ephemeris appear on MPEC 2005-J32.

     T = 2005 Apr. 17.402 TT          Peri. = 338.980
     e = 0.58018                      Node  = 268.928   2000.0
     q = 1.53305 AU                   Incl. =  31.824
       a =  3.65166 AU     n = 0.141244     P =   7.0 years

     D. K. Lynch, R. W. Russell, and R. J. Rudy, Aerospace
Corporation, report that spectroscopy (range 0.8-2.5 microns) of
V1187 Sco (cf. IAUC 8380, 8382), taken with the Infrared Telescope
Facility (+ SpeX) on Apr. 18.7 UT, shows that the object had faded
considerably (K = 13.2 from the spectrum) and that the lines were
still broad.  H I and He I 1.0830- and 2.0581-microns were present
(2900 km/s FWHM), as were some weak He II lines.  There was a
surprising lack of coronal lines, although the [Si VI] 1.9645-
micron line was strong and appeared to be split into two strong,
well-separated components.  The unidentified novae lines at 1.19
and 1.55 microns were present.  There was no evidence of thermal
emission from dust.

COMET C/1997 J5 (SOHO)
     Another faint Kreutz sungrazer (cf. IAUC 8524), stellar in

 Comet       1997 UT       R.A.(2000)Decl.  Inst.  F    MPEC
 C/1997 J5   May  2.197    2 48.8  +12 03    C3    RK   2005-H24

                      (C) Copyright 2005 CBAT
2005 May 8                     (8525)            Daniel W. E. Green

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