C/1998 P1 ( Williams )

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Updated on December 11, 2022

Profile Discovery Date August 10, 1998 Magnitude 9.5 mag Discoverer Peter Williams (Heathcote, Australia) Pictures

Orbital Elements The following improved orbital elements by Kenji Muraoka, are from 398 observations 1998 Aug. 11 to 1999 May 15, including 9 Planet and 5 minor planets perturbations and non-gravitational effect of style II ( A1 , A2 , A3 ). The mean residual is +/- 0.76 arc seconds. Epoch = 1998 Nov. 3.0 TT JDT = 2451120.5 T = 1998 Oct. 17.84580 +/- 0.00027 (m.e.) TT Peri. = 294.46742 +/- 0.00040 Node = 156.37090 +/- 0.00018 (2000.0) Incl. = 145.72753 +/- 0.00006 q = 1.1462029 +/- 0.0000068 AU e = 0.9987446 +/- 0.0000104 1/a = +0.0010953 +/- 0.0000091 1/AU A1 = +31.441 +/- 0.283 A2 = +2.14839 +/- 0.10776 A3 = -1.03488 +/- 0.03907 ( P = 27588 years )

Finding Charts

Magnitudes Graph m1 = 6.0 + 5 log d + 10.0 log r

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.