Central Bureau for Astronomical Telegrams

Central Bureau for Astronomical Telegrams -- Image credits

IAUC 9028: COMET P/2008 CL_94 (LEMMON); C/2008 W6-W10

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 9027 SEARCH Read IAUC 9029

View IAUC 9028 in .dvi, .ps or .PDF format.
IAUC number 

                                                  Circular No. 9028
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/2008 CL_94 (LEMMON)
     An apparently asteroidal object discovered last year in the
course of the Mt. Lemmon survey (discovery observation tabulated
below from MPS 237769) was re-discovered with the Mt. Lemmon
1.5-m reflector by S. M. Larson on 2009 Mar. 17.4 UT with an 8"-
diameter coma and a 15" diffuse tail in p.a. 310 deg in four
co-added images (and identified by T. Spahr).  Four unfiltered
60-s co-added Mt. Lemmon CCD images taken by A. R. Gibbs on Mar.
18.3 in good seeing show a condensed coma of size 6" with a broad,
10" tail in p.a. 315 deg.  Following a request by B. G. Marsden,
W. H. Ryan (Magdalena Ridge Observatory 2.4-m f/8.9 reflector)
reports that his images from Mar. 18.2-18.4 also show a faint tail
in p.a. approximately 315 deg.

     2008 UT             R.A. (2000) Decl.       Mag.
     Feb.  8.39714   11 27 55.15   +11 47 10.0   20.8

New astrometry, the following elliptical orbital elements, and an
ephemeris appear on MPEC 2009-F28.

                    Epoch = 2006 July  4.0 TT
     T = 2006 July  9.1877 TT         Peri. =  82.6364
     e = 0.121042                     Node  =  33.5426  2000.0
     q = 5.435878 AU                  Incl. =   8.3416
       a =  6.184456 AU    n = 0.0640843    P =  15.38 years


COMETS C/2008 W6-W10 (SOHO)
     Further to IAUC 9027, additional Kreutz sungrazers have been
found on SOHO website images, with their "discovery" observations
tabulated below.  C/2008 W6 was small and slightly diffuse (mag
about 7.5).  C/2008 W7 was stellar in appearance (mag about 7-7.5)
in C3 images, and slightly diffuse with a faint, diffuse tail in C2
images.  C/2008 W8 was tiny and stellar in appearance (mag about
7.5).  C/2008 W9 was diffuse (mag about 7.5).  C/2008 W10 was
slightly diffuse (mag about 7.5-8).

 Comet        2008 UT       R.A.(2000)Decl.   Inst.  F    MPEC
 C/2008 W6    Nov. 24.504   16 00.5  -22 24   C2     ZJ   2009-C56
 C/2008 W7         24.779   15 58.1  -23 38   C3/2   JR   2009-C56
 C/2008 W8         26.564   16 09.6  -22 47   C2     EB   2009-C57
 C/2008 W9         27.629   16 13.7  -22 59   C2     RK   2009-C57
 C/2008 W10        28.146   16 16.2  -23 03   C2     JR   2009-C57

                      (C) Copyright 2009 CBAT
2009 March 18                  (9028)            Daniel W. E. Green

Read IAUC 9027 SEARCH Read IAUC 9029

View IAUC 9028 in .dvi, .ps or .PDF format.

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

Valid HTML 4.01!