C/1999 U1 ( Ferris )

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Updated on January 22, 2000

Profile Discovery Date October 18, 1999 Magnitude 17.3 mag Discoverer William D. Ferris (Lowell Observatory) Pictures

Orbital Elements The following improved orbital elements by Kenji Muraoka, are from 125 observations 1999 Oct. 18 to Dec. 11, perturbations by 9 Planets, Moon and 5 minor planets were taken into account. The mean residual is +/- 0.54 arc seconds. Epoch = 1998 Aug. 15.0 TT JDT = 2451040.5 T = 1998 Sept. 2.87602 +/- 0.27754 (m.e.) TT Peri. = 291.03258 +/- 0.05868 Node = 58.25955 +/- 0.02605 (2000.0) Incl. = 105.72067 +/- 0.03577 q = 4.1361849 +/- 0.0029835 AU e = 1.0030455 +/- 0.0008960 1/a = -0.0007363 +/- 0.0002166 1/AU orig. 1/a = +0.000184 fut. 1/a = +0.000684

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.