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IAUC 8792: P/2007 A1; 2007A, 2007B, 2007C

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IAUC number 

                                                  Circular No. 8792
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)


COMET P/2007 A1 (LOVAS)
     Below are orbital elements by B. G. Marsden linking 38
observations of P/1986 W1 = P/2007 A1 (cf. IAUC 8791; mean residual
0".7):

                    Epoch = 1986 Sept. 7.0 TT
     T = 1986 Sept. 2.2572 TT         Peri. =  71.4102
     e = 0.592752                     Node  = 283.7467  2000.0
     q = 1.458819 AU                  Incl. =   1.5296
       a =  3.582141 AU    n = 0.1453751    P =   6.78 years

                    Epoch = 2006 Dec. 11.0 TT
     T = 2006 Dec. 12.4538 TT         Peri. =  77.4035
     e = 0.604101                     Node  = 278.3039  2000.0
     q = 1.395368 AU                  Incl. =   1.5532
       a =  3.524554 AU    n = 0.1489525    P =   6.62 years


SUPERNOVAE 2007A, 2007B, 2007C
     Three apparent supernovae have been discovered on unfiltered
CCD frames:  2007A by T. Puckett and T. Orff (cf. IAUC 8781; 0.35-m
reflector at Ellijay, GA; source of tabulated data below) and by D.
Madison and W. Li (LOSS/KAIT; cf. IAUC 8789); and 2007B (0.6-m
reflector) and 2007C (0.3-m reflector) by K. Itagaki (via S. Nakano;
cf. IAUC 8782).

SN      2007 UT     R.A.  (2000.0)  Decl.    Mag.     Offset
2007A   Jan. 2.02   0 25 16.66  +12 53 12.5  16.0  1".2 W, 10".1 N
2007B   Jan. 5.38  22 35 31.10  +34 48 06.6  16.7  7" W, 6" S
2007C   Jan. 7.86  13 08 49.30  - 6 47 01.0  15.9  9" E, 22" S

Additional magnitudes for 2007A in NGC 105:  2005 Dec. 15, [19.1
(Puckett); 2006 Dec. 7.15, [19.5 (KAIT); 20.13, [18.3 (KAIT); 2007
Jan. 3.12, 16.3 (KAIT); 4.14, 16.0 (J. Newton, Portal, AZ, 0.40-m
reflector).  The LOSS team reports position end figures 16s.68,
12".7 for 2007A.  Additional magnitudes for 2007B in NGC 7315:
2006 Dec. 25.41, [19.0; 2007 Jan. 7.395, 16.4.  Additional
magnitudes for 2007C in NGC 4981:  2006 Dec. 23.87, [18.5 (Itagaki);
2007 Jan. 8.704, 16.0 (K. Kadota, Ageo, Japan, 0.25-cm f/5
reflector; position end figures 49s.32, 47'00".3); 8.71, 15.8
(Itagaki).  All three objects were found near maximum:  2007A and
2007B being type-Ia supernovae, and 2007C of type Ib (details on
CBETs 796, 799, and 800).

                      (C) Copyright 2007 CBAT
2007 January 10                (8792)            Daniel W. E. Green

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