21P/Giacobini-Zinner (1998)

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Total 6,336 html files since Dec. 4, 1995 Updated on April 23, 2005

Profile Pictures

Orbital Elements The following improved orbital elements by Kenji Muraoka, are from 967 observations 1978 to 1998, including 9 Planets, Moon and 5 minor planets perturbations and non-gravitational effect of style II. The mean residual is +/- 0.92 arc seconds. Epoch = 1998 Nov. 3.0 TT JDT = 2451120.5 T = 1998 Nov. 21.32049 +/- 0.00092 (m.e.) TT Peri. = 172.54344 +/- 0.00013 Node = 195.39846 +/- 0.00002 (2000.0) Incl. = 31.85878 +/- 0.00001 q = 1.0337127 +/- 0.0000005 AU e = 0.7064832 +/- 0.0000001 a = 3.5218181 +/- 0.0000006 AU n = 0.14912611 +/- 0.00000004 P = 6.609 +/- 0.0000017 years A1 = +0.235 +/- 0.017 A2 = -0.05939 +/- 0.00022

Finding Charts

Magnitudes Graph m1 = 9.0 + 5 log d + 18.5 log r(t + 15) [ , 15] ( - 1998 Dec. 6) m1 = 9.7 + 5 log d + 10.0 log r [ 15,120] (1998 Dec. 6 - 1999 Mar. 21) m1 = 7.0 + 5 log d + 20.0 log r [120, ] (1999 Mar. 21 - )

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.