Central Bureau for Astronomical Telegrams

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IAUC 9024: 2009 DD_45; C/2008 V4, C/2008 V5, C/2008 V6; C/2007 N3; N LMC 2009

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IAUC number 

                                                  Circular No. 9024
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://www.cfa.harvard.edu/iau/cbat.html  ISSN 0081-0304
Phone 617-495-7440/7244/7444 (for emergency use only)


2009 DD_45
     R. P. Binzel, M. Birlan, and F. E. DeMeo, Paris Observatory,
report on their 0.8- to 2.5-micron spectroscopic measurements of
2009 DD_45 (cf. MPEC 2009-D80) on Mar. 2.6 UT using the NASA
Infrared Telescope Facility 3-m reflector on Mauna Kea.  Absorption
bands revealed at 1 and 2 microns show the characteristics of the
S-type class of minor planets.   Using the average albedo value of
0.36 for small near-earth objects in this class (Delbo et al. 2003,
Icarus 166, 116), and based on its H magnitude (25.4), the mean
diameter is estimated to be 19 +/- 4 m.  The Apollo-type object
passed only 0.000482 AU from the earth on Mar. 2.57 (cf. MPEC
2009-E10).


COMETS C/2008 V4, C/2008 V5, C/2008 V6 (SOHO)
     Further to IAUC 9022, additional near-sun presumed comets have
been found on SOHO website images, with their "discovery"
observations tabulated below -- all Kreutz sungrazers except for
C/2008 V5 (non-group).  C/2008 V4 was very faint (mag about 8-8.5)
and condensed.  C/2008 V5 was perhaps very slightly diffuse but
very small (mag about 7.5-8).

 Comet        2008 UT       R.A.(2000)Decl.   Inst.  F    MPEC
 C/2008 V4    Nov.  7.063   14 46.2  -17 46   C2     RM   2009-C46
 C/2008 V5          8.660   15 04.1  -16 00   C2     JR   2009-C47
 C/2008 V6         11.868   15 06.1  -18 57   C2     JR   2009-C47


COMET C/2007 N3 (LULIN)
     Corrigendum.  On IAUC 9023, line 12, FOR  267 +/- 10 K,  READ
276 +/- 10 K,
     Further visual total-magnitude and coma-diameter estimates:
Feb. 14.19 UT, 5.5, 10' (B. H. Granslo, Fjellhamar, Norway, 7x50
binoculars); 20.52, 5.0, 20' (M. Mattiazzo, Castlemaine, Victoria,
Australia, 10x50 binoculars); 24.31, 4.7, 20' (C. S. Morris,
Fillmore, CA, U.S.A., 10x50 binoculars); 27.94, 4.9, 25' (T.
Karhula, Virsbo, Sweden, 8x40 binoculars); Mar. 3.14, 5.3, 25'
(J. J. Gonzalez, Leon, Spain, naked eye).


NOVA IN THE LARGE MAGELLANIC CLOUD 2009
     G. Bianciardi, University of Siena, reports the following V
magnitudes for this nova (cf. IAUC 9019) from CCD images obtained
remotely using a 0.35-m reflector near Sydney, N.S.W.:  Feb. 25.717
UT, 14.50; 26.628, 14.72.

                      (C) Copyright 2009 CBAT
2009 March 4                   (9024)            Daniel W. E. Green

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