C/1999 H1 ( Lee )

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Updated on January 26, 2000

Profile Discovery Date April 16, 1999 Magnitude 9 mag Discoverer Steven Lee (Mudgee, N.S.W.) Pictures

Orbital Elements The following improved orbital elements by Kenji Muraoka, are from 888 observations 1999 Apr. 16 to Dec. 10, including 8 Planets, Moon and 3 minor planets perturbations and non-gravitational effect of style II. The mean residual is +/- 0.78 arc seconds. Epoch = 1999 July 1.0 TT JDT = 2451360.5 T = 1999 July 11.17316 +/- 0.00019 (m.e.) TT Peri. = 40.70436 +/- 0.00060 Node = 162.65140 +/- 0.00018 (2000.0) Incl. = 149.35276 +/- 0.00009 q = 0.7080729 +/- 0.0000070 AU e = 0.9996221 +/- 0.0000050 1/a = +0.0005337 +/- 0.0000071 1/AU A1 = +2.65 +/- 0.28 A2 = -0.1028 +/- 0.0527 ( P = 81103 years )

Finding Charts

Magnitudes Graph m1 = 6.3 + 5 log d + 14.0 log r [ ,-35] ( - 1999 June 6) m1 = 6.3 + 5 log d + 5.0 log r [-35, 40] (1999 June 6 - 1999 Aug. 20) m1 = 6.0 + 5 log d + 14.0 log r [ 40,120] (1999 Aug. 20 - 1999 Nov. 8) m1 = 8.9 + 5 log d + 10.0 log r [120, ] (1999 Nov. 8 - )

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.