[IAUC] IAUC 8792: P/2007 A1; 2007A, 2007B, 2007C [25139-2007/05-R1]
IAUC mailing list
quai en cfa.harvard.edu
Vie Jun 22 17:02:21 ART 2007
Circular No. 8792
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS en CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT en 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 2006 CBAT
2007 January 10 (8792) Daniel W. E. Green
Más información sobre la lista de distribución Iauc