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

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                                                  Circular No. 8723Central Bureau for Astronomical TelegramsINTERNATIONAL ASTRONOMICAL UNIONMailstop 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 0081-0304Phone 617-495-7440/7244/7444 (for emergency use only)SATELLITES OF PLUTO     Further toIAUC 8648, the IAU Working Group for PlanetarySystem Nomenclature has approved the following new designations andnames of satellites of Pluto:    Pluto II        Nix         = S/2005 P 2    Pluto III       Hydra       = S/2005 P 1SUPERNOVAE 2006db, 2006dc, 2006dd     Three additional supernovae have been discovered on unfilteredCCD 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.     Offset2006db  June 16.18  11 55 38.69  +44 23 01.4  17.2  4".6 E, 0".5 N2006dc  June 18.36  16 16 04.04  -22 37 16.7  17.8  6".3 E, 14".6 N2006dd  June 19.17   3 22 41.62  -37 12 13.0  15.0  0".3 W, 16" NAdditional 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 magnitudesby 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 isvisible 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 bothtype-IIn supernovae (CBETs 551, 552).  S. Immler et al. report onCBET 554 that photometry of 2006dd are suggestive of its being ayoung type-II supernova, with V = 14.0 on June 20.71 UT.SUPERNOVAE 2006ap, 2006cz, 2006da     The following recently discovered supernovae have beenclassified spectroscopically by Blondin et al. as type-Ia events;listed are SN designation, announcement IAUC, date of spectroscopyand approximate of age then with respect to maximum light, and theCBET where the details appear:  2006ap,IAUC 8683, Mar. 4.5 UT, +2weeks, CBET 418; 2006cz, 8721, June 17, +1 day, 550; 2006da, 8722,June 17, +1 week, 550.                      (C) Copyright 2006 CBAT2006 June 21                   (8723)            Daniel W. E. Green

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