26P/Grigg-Skjellerup (1997)

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Updated on January 22, 1998

Profile

Orbital Elements The following improved orbital elements by Kenji Muraoka, are from 184 observations 1961 to 1997, including 9 Planets, Moon and 5 minor planets perturbations and non-gravitational effect of style II. The mean residual is +/- 0.86 arc seconds. Epoch = 1997 Aug. 20.0 TT JDT = 2450680.5 T = 1997 Aug. 30.30345 +/- 0.00014 (m.e.) TT Peri. = 359.33168 +/- 0.00004 Node = 213.30918 +/- 0.00005 (2000.0) Incl. = 21.08677 +/- 0.00004 q = 0.9968105 +/- 0.0000009 AU e = 0.6638057 +/- 0.0000003 a = 2.9649833 +/- 0.0000012 AU n = 0.19305039 +/- 0.00000011 P = 5.105 +/- 0.0000030 years A1 = +0.002 +/- 0.002 A2 = -0.00112 +/- 0.00002

Finding Charts 1997 July 1 - 1997 Nov. 28

Magnitudes Graph m1 = 15.0 + 5 log d + 10.0 log r [ ,-55] ( - 1997 July 6) m1 = 12.0 + 5 log d + 40.0 log r [-55, 55] (1997 July 6 - 1997 Oct. 24) m1 = 15.0 + 5 log d + 10.0 log r [ 55, ] (1997 Oct. 24 - )

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.