Central Bureau for Astronomical Telegrams

Central Bureau for Astronomical Telegrams -- Image credits

IAUC 8815: 2002 GZ_31; C/2006 X3-X10

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 8814  SEARCH Read IAUC 8816

View IAUC 8815 in .dvi, .ps or .PDF format.
IAUC number

                                                  Circular No. 8815
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)

2002 GZ_31
     K. S. Noll, Space Telescope Science Institute (STScI); W. M.
Grundy, Lowell Observatory; S. D. Kern, STScI; H. F. Levison,
Southwest Research Institute; and D. C. Stephens, Brigham Young
University, report the detection of a binary companion to the
transneptunian object 2002 GZ_31 (cf. MPECs 2002-K12, 2003-M16; MPO
66276).  The observations were made during 2006 Apr. 23.352-23.377
UT with the High Resolution Camera of the Advanced Camera for
Surveys on the Hubble Space Telescope, using the clear filters with
one 300-s exposure at each of four dithered positions on the
detector.  The two components were separated by an angular distance
of 0".070 +/- 0".009 and differ in brightness by 1.0 magnitude.
The fainter component lies at a position angle of 352 +/- 10 deg
from the primary.  The projected separation of the objects in the
sky plane is 2060 +/- 270 km.

COMETS C/2006 X3-X10 (SOHO)
     Additional comets have been found on SOHO website images (cf.
IAUC 8813) -- all Kreutz sungrazers except for C/2006 X10 (Meyer
group).  K. Battams notes that C/2006 X3, C/2006 X5, C/2006 X6,
C/2006 X8, and C/2006 X9 were all extremely faint (mag about 8.5).
C/2006 X3, which was observed during a solar-particle storm that
hit the SOHO spacecraft, appeared diffuse.  C/2006 X4 was stellar
in appearance and reached mag about 6 in C3 images, while C2 images
showed a hint of a very faint tail.  C/2006 X5 was very diffuse and
elongated.  C/2006 X6 was tiny and slightly diffuse.  C/2006 X7 was
stellar in appearance in C3 images, of mag about 6.5, while C2
images showed it as slightly diffuse with a hint of a faint tail.
C/2006 X8 was stellar in appearance.  C/2006 X9, which was also
found by R. Kracht, was a very diffuse blob.  C/2006 X10 was
stellar in appearance, reaching mag about 7.5.

 Comet       2006 UT       R.A.(2000)Decl.   Inst.  F    MPEC
 C/2006 X3   Dec. 9.567   17 06.8   -24 43   C2     BZ   2007-C40
 C/2006 X4       10.513   17 08.9   -26 51   C3/2   TS   2007-C40
 C/2006 X5       10.550   17 11.4   -24 49   C2     MM   2007-C40
 C/2006 X6       11.675   17 16.4   -24 53   C2     XG   2007-C40
 C/2006 X7       11.988   17 17.0   -26 10   C3/2   HS   2007-C41
 C/2006 X8       12.567   17 20.9   -24 55   C2     BZ   2007-C41
 C/2006 X9       15.204   17 34.6   -25 01   C2     TH   2007-C41
 C/2006 X10      15.479   17 30.3   -22 17   C2     RK   2007-C41

                      (C) Copyright 2007 CBAT
2007 February 28               (8815)            Daniel W. E. Green

Read IAUC 8814  SEARCH Read IAUC 8816

View IAUC 8815 in .dvi, .ps or .PDF format.

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

Valid HTML 4.01!