Central Bureau for Astronomical Telegrams

Central Bureau for Astronomical Telegrams -- Image credits

IAUC 8745: 2003 QW_111; 2006es, 2006et, 2006eu

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 8744 SEARCH Read IAUC 8746

View IAUC 8745 in .dvi, .ps or .PDF format.
IAUC number 

                                                  Circular No. 8745
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)


2003 QW_111
     K. S. Noll, Space Telescope Science Institute; W. M. Grundy,
Lowell Observatory; D. C. Stephens, Johns Hopkins University; and
H. F. Levison, Southwest Research Institute, report the detection
of a binary companion to the transneptunian object 2003 QW_111 (cf.
MPEC 2003-S19, MPO 86083; with osculating elements a = 43.54 AU, e
= 0.109, i = 2.67 deg); orbit integrations carried out by the Deep
Ecliptic Survey group show this object to be in 4:7 resonance with
Neptune, and this is the first binary to be found in this dynamical
group.  The observations were made during 2006 July 25.365-25.410
UT with the High Resolution Camera of the Advanced Camera for
Surveys on the Hubble Space Telescope (HST), using the clear
filters with one 300-s exposure at each of four dithered positions
on the detector.  Two components are clearly resolved in each image
and in the coadded image.  The two components are separated by an
angular distance of 0".325 +/- 0".005.  The fainter component lies
at a position angle of 114.6 +/- 0.8 deg, as measured from the
primary.  The projected separation of the objects in the sky plane
is 10360 +/- 160 km.  The fainter component is 1.5 magnitudes
fainter than the brighter of the two.  The HST corrected for
parallax and tracked both components of 2003 QW_111 as they moved
together at an average rate of 0".035/min.


SUPERNOVAE 2006es, 2006et, 2006eu
     Three apparent supernovae have been discovered on unfiltered
CCD images:  2006es and 2006eu by J. Schwehr, N. Lee, and W. Li
(LOSS/KAIT; cf. IAUC 8744); and 2006et by K. Itagaki (Teppo-cho,
Yamagata, Japan; via S. Nakano, Sumoto, Japan).  Additional
magnitudes for 2006es in UGC 2828:  Feb. 14.20 UT, [19.5; Aug.
14.53, 17.0 (poor seeing).  SN 2006es is a type-Ia supernova, now
about 3-4 weeks past maximum brightness (cf. CBET 613).  Additional
magnitudes for 2006et in NGC 232:  Aug. 24.69, [18.5; 30.68, 17.0.
Nothing was visible at the location of 2006et on Itagaki's survey
frames taken prior to Aug. 24 (limiting mag 19) or on the Digitized
Sky Survey.  Additional KAIT magnitudes for 2006eu in MCG +08-36-16:
Aug. 16.23, [19.5; 25.22, 19.1: (hint, at limit); Sept. 4.26, 17.2.

SN      2006 UT      R.A.  (2000.0)  Decl.    Mag.     Offset
2006es  Sept. 1.54   3 42 24.48  +39 14 31.0  18.0  5".1 E, 8".3 S
2006et  Sept. 3.77   0 42 45.82  -23 33 30.4  16.1  0".3 E, 11".0 N
2006eu  Sept. 3.21  20 02 51.15  +49 19 02.3  17.4  12".7 E, 9".3 S

                      (C) Copyright 2006 CBAT
2006 September 7               (8745)            Daniel W. E. Green

Read IAUC 8744 SEARCH Read IAUC 8746

View IAUC 8745 in .dvi, .ps or .PDF format.

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

Valid HTML 4.01!