2P/Encke (1997)

Japanese version Home page

Updated on September 28, 2003

Profile

Orbital Elements The following improved orbital elements by Kenji Muraoka, are from 250 observations 1982 to 1998, including 9 Planets, Moon and 5 minor planets perturbations and non-gravitational effect of style II. The mean residual is +/- 0.83 arc seconds. Epoch = 1997 June 1.0 TT JDT = 2450600.5 T = 1997 May 23.59866 +/- 0.00020 (m.e.) TT Peri. = 186.27254 +/- 0.00007 Node = 334.72093 +/- 0.00006 (2000.0) Incl. = 11.92936 +/- 0.00001 q = 0.3313956 +/- 0.0000002 AU e = 0.8500137 +/- 0.0000001 a = 2.2095057 +/- 0.0000006 AU n = 0.30009682 +/- 0.00000012 P = 3.284 +/- 0.0000014 years A1 = -0.009 +/- 0.003 A2 = -0.00132 +/- 0.00002

Finding Charts 1996 July 6 - 1997 June 26 1997 June 11 - 1997 July 16 1997 July 11 - 1998 Mar. 18

Magnitudes Graph m1 = 15.0 + 5 log d + 5.0 log r [ ,-100] ( - 1997 Feb. 12) m1 = 9.8 + 5 log d + 25 log r [-100, -45] (1997 Feb. 12 - 1997 Apr. 8) m1 = 10.3 + 5 log d + 7.0 log r [ -45, 20] (1997 Apr. 8 - 1997 June 12) m1 = 12.3 + 5 log d + 15.7 log r [ 20, 100] (1997 June 12 - 1997 Aug. 31) m1 = 15.0 + 5 log d + 5.0 log r [ 100, ] (1997 Aug. 31 - )

The orbital elements are calculated by Kenji Muraoka. The charts are made with StellaNavigator Ver.2.0 for Windows (AstroArts / ASCII). The magnitudes graphs are made with Comet for Windows.