Central Bureau for Astronomical Telegrams

Central Bureau for Astronomical Telegrams -- Image credits

IAUC 9039: COMET P/2009 H1 (LINEAR); C/2008 Y12-Y15

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 9038 SEARCH Read IAUC 9040

View IAUC 9039 in .dvi, .ps or .PDF format.
IAUC number 

                                                  Circular No. 9039
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/2009 H1 (LINEAR)
     E. Guido, G. Sostero, P. Camilleri, and E. Prosperi report
their recovery of comet P/2002 LZ_11 (cf. IAUC 8240) on unfiltered
CCD exposures taken remotely with a 0.25-m reflector near Mayhill,
NM, U.S.A., on Apr. 17; co-added exposures show an extremely
compact coma about 12" in diameter and a short tail nearly 25" long
toward the west.  Confirming astrometry on Apr. 18 was obtained by
the same team remotely with a 0.37-m reflector near Sonoita, AZ,
U.S.A.; co-added exposures show a coma about 8" in diameter with a
faint extension toward the west.

     2009 UT             R.A. (2000) Decl.       Mag.
     Apr. 17.45321   18 07 32.66   -17 42 44.3   18.8
          18.37396   18 07 49.24   -17 38 42.0   19.4

     The indicated correction to the predictions on MPC 59599 and
in the 2008/2009 Comet Handbook is Delta(T) = -0.4 day.  The
following orbital elements by B. G. Marsden are from 154
observations spanning 2002 June 5-2009 Apr. 18 (mean residual 0".7).
Additional astrometry and orbital elements, residuals, and an
ephemeris appear on CBET 1772.

                    Epoch = 2010 Mar. 25.0 TT
     T = 2010 Mar.  5.73233 TT        Peri. = 107.76353
     e = 0.3532609                    Node  = 231.05130 2000.0
     q = 2.3643294 AU                 Incl. =  11.52093
       a =  3.6557699 AU   n = 0.14100542   P =   6.990 years


COMETS C/2008 Y12-Y15 (SOHO)
     Further to IAUC 9037, additional near-sun presumed comets have
been found on SOHO website images.  C/2008 Y12 and Kreutz sungrazer
C/2008 Y15 were stellar in appearance (mag about 7.5).  C/2008 Y13,
also a Kreutz sungrazer, appeared stellar (mag about 7-7.5) in C3
images, but was very diffuse, faint, and slightly elongated in C2
images.  C/2008 Y14 was very diffuse (mag about 8).

 Comet        2008 UT       R.A.(2000)Decl.   Inst.  F    MPEC
 C/2008 Y12   Dec. 22.704   17 58.6  -22 42   C2     RK   2009-F17
 C/2008 Y13        27.888   18 36.1  -25 38   C3/2   AK   2009-F18
 C/2008 Y14        27.896   18 20.0  -22 43   C2     JR   2009-F18
 C/2008 Y15        29.821   18 45.1  -25 36   C3     BZ   2009-F18

                      (C) Copyright 2009 CBAT
2009 April 18                  (9039)            Daniel W. E. Green

Read IAUC 9038 SEARCH Read IAUC 9040

View IAUC 9039 in .dvi, .ps or .PDF format.

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

Valid HTML 4.01!