C/1999 S4 ( LINEAR )

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Updated on November 10, 2002

Profile Discovery Date September 27, 1999 Magnitude 17.3 mag Discoverer Lincoln Laboratory Near-Earth Asteroid Research project Pictures

Orbital Elements The following improved orbital elements by Kenji Muraoka, are from 776 observations 1999 Sept. 27 to 2000 June 1, perturbations by 9 Planets, Moon and 5 minor planets were taken into account. The mean residual is +/- 0.64 arc seconds. Epoch = 2000 Aug. 4.0 TT JDT = 2451760.5 T = 2000 July 26.16847 +/- 0.00071 (m.e.) TT Peri. = 151.06718 +/- 0.00017 Node = 83.19042 +/- 0.00022 (2000.0) Incl. = 149.38993 +/- 0.00009 q = 0.7650068 +/- 0.0000065 AU e = 0.9999970 +/- 0.0000016 1/a = +0.0000039 +/- 0.0000020 1/AU orig. 1/a = +0.0000029 fut. 1/a = +0.0010393

Finding Charts

Magnitudes Graph m1 = 8.3 + 5 log d + 8.0 log r [ ,-55] ( - 2000 June 1) m1 = 7.6 + 5 log d + 15 log r [-55,-35] (2000 June 1 - 2000 June 21) m1 = 7.7 + 5 log d - 10 log r [-35, -5] (2000 June 21 - 2000 July 21) m1 = 20.1 + 5 log d + 100 log r [ -5, 0] (2000 July 21 - 2000 July 26) m1 = 46.3 + 5 log d + 325 log r [ 0, 13] (2000 July 26 - 2000 Aug. 8) m1 = 17 + 5 log d + 15 log r [ 13, ] (2000 Aug. 8 - ) * Gray curve is: m1 = 8.3 + 5 log d + 8.0 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.