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IAUC 8723: Sats OF PLUTO; 2006db, 2006dc, 2006dd; 2006ap, 2006cz, 2006da

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                                                  Circular No. 8723
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)
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Phone 617-495-7440/7244/7444 (for emergency use only)


SATELLITES OF PLUTO
     Further to IAUC 8648, the IAU Working Group for Planetary
System Nomenclature has approved the following new designations and
names of satellites of Pluto:

    Pluto II        Nix         = S/2005 P 2
    Pluto III       Hydra       = S/2005 P 1


SUPERNOVAE 2006db, 2006dc, 2006dd
     Three additional supernovae have been discovered on unfiltered
CCD images:  2006db by R. Quimby and P. Mondol (cf. IAUC 8622),
2006dc by W. Li (LOSS/KAIT; cf. IAUC 8721), and 2006dd by L. A.
G. Monard (cf. IAUC 8709).

SN      2006 UT      R.A.  (2000.0)  Decl.    Mag.     Offset
2006db  June 16.18  11 55 38.69  +44 23 01.4  17.2  4".6 E, 0".5 N
2006dc  June 18.36  16 16 04.04  -22 37 16.7  17.8  6".3 E, 14".6 N
2006dd  June 19.17   3 22 41.62  -37 12 13.0  15.0  0".3 W, 16" N

Additional approximate magnitudes for 2006db:  2005 Mar. 4 and Apr.
8, [18.4 (co-addition of images); 2006 June 17.17 UT, 16.8.
Additional KAIT magnitudes for 2006dc in IC 4596:  May 20.44, [19.0;
30.42, 18.0; June 19.29, 17.7.  Additional approximate magnitudes
by Monard for 2006dd in NGC 1316:  June 2.153, [17.5 (unfiltered);
20.158, B = 14.66, V = 14.41, R = 14.60, I = 14.30.  Nothing is
visible at the location of 2006dd on the Digitized Sky Survey
(limiting red mag 20.5).
     S. Blondin et al. report that 2006db and 2006dc are both
type-IIn supernovae (CBETs 551, 552).  S. Immler et al. report on
CBET 554 that photometry of 2006dd are suggestive of its being a
young type-II supernova, with V = 14.0 on June 20.71 UT.


SUPERNOVAE 2006ap, 2006cz, 2006da
     The following recently discovered supernovae have been
classified spectroscopically by Blondin et al. as type-Ia events;
listed are SN designation, announcement IAUC, date of spectroscopy
and approximate of age then with respect to maximum light, and the
CBET where the details appear:  2006ap, IAUC 8683, Mar. 4.5 UT, +2
weeks, CBET 418; 2006cz, 8721, June 17, +1 day, 550; 2006da, 8722,
June 17, +1 week, 550.

                      (C) Copyright 2006 CBAT
2006 June 21                   (8723)            Daniel W. E. Green

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