138P/Shoemaker-Levy 7 (1998)

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Updated on April 23, 2006

Profile Designation 138P/1998 O1 Recovery Date July 25, 1998 Magnitude 20.7 mag Recoverer J. V. Scotti (Lunar and Planetary Laboratory)

Orbital Elements The following improved orbital elements by Kenji Muraoka, are from 44 observations 1991 Nov. 13 to 1998 Dec. 16, perturbations by 9 Plantes, Moon and 5 minor planets were taken into account. The mean residual is +/- 0.69 arc seconds. Epoch = 1998 Aug. 15.0 TT JDT = 2451040.5 T = 1998 Aug. 24.56639 +/- 0.00125 (m.e.) TT Peri. = 95.52316 +/- 0.00072 Node = 309.51785 +/- 0.00035 (2000.0) Incl. = 10.08888 +/- 0.00004 q = 1.6971999 +/- 0.0000039 AU e = 0.5311206 +/- 0.0000012 a = 3.6196936 +/- 0.0000034 AU n = 0.14311869 +/- 0.00000020 P = 6.887 +/- 0.0000098 years

Finding Charts

Magnitudes Graph m1 = 16.0 + 5 log d + 10.0 log r(t - 50)

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.