Central Bureau for Astronomical Telegrams

Central Bureau for Astronomical Telegrams -- Image credits

IAUC 8304: 2003 VB_12; C/2001 Q4; 2004an, 2004ao,, 2004at; IRAS 05436-0007

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 8303  SEARCH Read IAUC 8305

View IAUC 8304 in .dvi or .ps format.
IAUC number

                                                  Circular No. 8304
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)

2003 VB_12
     A very-slow-moving body reported by M. E. Brown, C. A.
Trujillo, and D. L. Rabinowitz, on CCD images obtained with the
Palomar 1.2-m Schmidt telescope on 2003 Nov. 14, is apparently the
second-largest known transneptunian object (after Pluto), with an
absolute magnitude H = 1.7.  Subsequent observations have been
found on CCD images and sky-survey photographs back to 2001 by
Brown et al., leading to orbital elements (T = 2076, q = 76 AU, Q
approximately 1000 AU, i = 11.9 deg; cf. MPEC 2004-E45).

COMET C/2001 Q4 (NEAT)
     A. Lecacheux, N. Biver, J. Crovisier, and D. Bockelee-Morvan,
Observatoire de Paris, on behalf of the Odin Team, write:  "The
H_2O 110-101 line at 556.936 GHz was observed in comet C/2001 Q4 on
Mar. 6.6 UT with high spectral resolution (80 m/s).  The line
integrated intensity (main beam brightness temperature) was 2.7 +/-
0.1 K km/s over the 2-hr observation.  This corresponds to a
preliminary water-production rate of 1.3 x 10**29 molecules/s,
taking into account opacity effects."
     Visual total-magnitude estimates by A. Pearce, Nedlands, W.
Australia (20x80 binoculars):  Mar. 9.55 UT, 7.5; 10.52, 7.4;
11.52, 7.4; 13.50, 7.3; 15.52, 7.1.

SUPERNOVAE 2004an, 2004ao, AND 2004at
     Further to IAUC 8303, T. Matheson, P. Challis, and R. Kirshner
report that a spectrum of SN 2004an (cf. IAUC 8299), obtained by P.
Berlind on Mar. 14.45 UT, shows it to be a type-II supernova.
Adopting the NASA/IPAC Extragalactic Database recession velocity of
8979 km/s for the host galaxy, the expansion velocity derived from
the minimum of the H_beta line is 8800 km/s.  A spectrum of SN
2004ao (cf. IAUC 8299), obtained on Mar. 14.53, shows it to be a
type-Ib supernova, similar to SN 1998dt at 8 days past maximum (see
Matheson et al. 2001, A.J. 121, 1648).  A spectrum of SN 2004at
(cf. IAUC 8302), obtained on Mar. 15.53, shows it to be a type-II

IRAS 05436-0007
     Corrigendum.  On IAUC 8301, line 9, *for*  Pa_delta  *read*

                      (C) Copyright 2004 CBAT
2004 March 15                  (8304)            Daniel W. E. Green

Read IAUC 8303  SEARCH Read IAUC 8305

View IAUC 8304 in .dvi or .ps format.

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

Valid HTML 4.01!