Central Bureau for Astronomical Telegrams

Central Bureau for Astronomical Telegrams -- Image credits

IAUC 8679: COMET 73P/SCHWASSMANN-WACHMANN; COMET 41P/TUTTLE-GIACOBINI-KRESAK; C/2005 Y7, Y8, Y9, Y10

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 8678 SEARCH Read IAUC 8680

View IAUC 8679 in .dvi, .ps or .PDF format.
IAUC number 

                                                  Circular No. 8679
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 73P/SCHWASSMANN-WACHMANN
     Another companion to comet 73P (cf. IAUC 8659, 8663) has been
found by R. A. Tucker (Tucson, AZ, 0.35-m reflector, on Feb. 20.4
and 22.4 UT) and E. J. Christensen (at mag 17.2 with a 15" coma and
a fanlike tail approximately 20" long in p.a. 250-310 deg on Mt.
Lemmon Survey images taken on Feb. 24.5, with additional images
also acquired on Feb. 25.5), denoted component 'G' on MPEC 2006-D47.
Z. Sekanina, Jet Propulsion Laboratory, notes that this companion
is not likely to be 'E' or 'F'.  The positions of component 'G' are
consistent with the orbit for component 'B' (cf. MPEC 2006-B27, MPC
55982) but with T = 2006 June 8.11 TT ('B' has T = June 7.94, and
'C' has T = June 6.95; cf. MPC 55524).


COMET 41P/TUTTLE-GIACOBINI-KRESAK
     This comet has been observed for the first time since 2001 via
images taken in the course of the LINEAR survey on Feb. 3.2 UT and
in the course of the Mt. Lemmon Survey on Feb. 24.2 and 25.2 (cf.
MPEC 2006-D45).  E. J. Christensen, Lunar and Planetary Laboratory,
reports that the Mt. Lemmon images on Feb. 24 show a coma of total
mag 17.0 and size 15" x 20", elongated along the axis in p.a.
100/280 deg.


COMETS C/2005 Y7, Y8, Y9, Y10 (SOHO)
     Additional comets have been found on SOHO website images (cf.
IAUC 8672) -- all being Kreutz sungrazers except for C/2005 Y8
(Meyer group), which was stellar in appearance but elongated
horizontally (3x1 pixels), reaching mag 6.9 at 5.1 solar radii on
Dec. 25.079 UT.  C/2005 Y7 was small, stellar, and very faint in C3
images, and visible in C2 images as an extremely faint, fuzzy
streak.  C/2005 Y9 was stellar and condensed in C3 images, becoming
teardrop-shaped near the C2 field-of-view, while in C2 images it
showed a starlike head (reaching mag 4.0 at 7.9 solar radii on Dec.
27.412) with a thin, faint tail that reached a length of about 28'
at 6.0 solar radii on Dec. 27.588.  C/2005 Y10 was very faint,
small, and slightly diffuse.

 Comet        2005 UT       R.A.(2000)Decl.   Inst.  F    MPEC
 C/2005 Y7    Dec. 24.779  18 21.8   -26 22   C3/2   RK   2006-D03
 C/2005 Y8         24.963  18 15.2   -22 39   C2     RK   2006-D03
 C/2005 Y9         26.221  18 29.5   -28 45   C3/2   SF   2006-D03
 C/2005 Y10        27.229  18 30.0   -24 57   C2     QY   2006-D03

                      (C) Copyright 2006 CBAT
2006 February 27               (8679)            Daniel W. E. Green

Read IAUC 8678 SEARCH Read IAUC 8680

View IAUC 8679 in .dvi, .ps or .PDF format.

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

Valid HTML 4.01!