Central Bureau for Astronomical Telegrams
IAUC 8232: 2003jb, 2003jc, 2003jd,, 2003je; S/2003 (22899) 1
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Circular No. 8232
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)
SUPERNOVAE 2003jb, 2003jc, 2003jd, AND 2003je
Four apparent supernovae have been discovered on unfiltered
CCD images: 2003jb by R. Arbour (cf. IAUC 8205), and the rest by
LOSS/KAIT (cf. IAUC 8231, via J. Burket, B. Swift and W. Li).
SN 2003 UT R.A. (2000.0) Decl. Mag. Offset
2003jb Oct. 23.84 14 49 22.28 +63 16 06.2 16.5 4".6 E, 8".0 S
2003jc Oct. 24.2 23 04 53.34 - 6 32 12.1 17.0 20".2 W, 6".6 N
2003jd Oct. 25.2 23 21 03.38 - 4 53 45.5 16.1 8".3 E, 7".7 S
2003je Oct. 25.5 8 49 22.24 +36 42 56.6 18.1 3".7 W, 19".8 N
The above astrometry for SN 2003jb in IC 1065 is by D. Briggs,
Portsmouth, England, from an image obtained with a 0.60-m reflector
on Oct. 24.911 UT (estimated mag approximately 15.9); Arbour's own
position end figures, obtained from an image taken in more inferior
conditions, are 21s.98, 08".6. Arbour adds that SN 2003jb is not
present on his image taken on Oct. 17.88 or on Digitized Sky Survey
images (limiting magnitudes fainter than 20.0 from a blue plate and
18.5 from a red plate). Additional approximate KAIT magnitudes: SN
2003jc in MCG -01-58-18, Oct. 5.2, [18.5; 25.2, 16.9. SN 2003jd in
MCG -01-59-21, Oct. 16.2, [19.0; 26.2, 16.0. SN 2003je in NGC 2668,
Oct. 15.5, [19.0; 26.5, 17.9.
S/2003 (22899) 1
W. J. Merline, Southwest Research Institute (SwRI); P. M.
Tamblyn, Binary Astronomy and SwRI; C. R. Chapman, D. Nesvorny, and
D. D. Durda, SwRI; C. Dumas, JPL; A. D. Storrs, Towson University;
L. M. Close, University of Arizona; and F. Menard, Observatoire de
Grenoble, report the discovery on July 26.6 UT, on six direct
images (two sets of three images taken 20 min apart in time) made
with the Hubble Space Telescope (+ ACS/HRC) in the F606W (600-nm
broadband) filter, of a satellite of minor planet (22899) 1999
TO_14 (V about 18). The satellite is clearly separated in five of
these images but streaked in a sixth due to pointing jitter.
Trails of several background stars in successive images indicate
that the target object is not a background binary star. On July
26.6545, the satellite was at separation 0".14 (projected
separation 170 km) in p.a. 235 deg. Using the average albedo of
the Koronis family (about 0.21), to which (22899) belongs, the
size of the primary is estimated to be 4.5 km. The brightness
difference is about 2.5 mag, giving an estimated diameter of the
secondary of about 1.5 km. This then is the smallest main-belt
asteroid known to be binary.
(C) Copyright 2003 CBAT
2003 October 26 (8232) Daniel W. E. Green
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