C/1996 J1 ( Evans-Drinkwater )

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Updated on March 27, 1999

Profile Discovery Date May 10, 1996 Magnitude 16 mag Discoverer Robert Evans, M. J. Drinkwater (Siding Spring, Australia)

Orbital Elements Comet C/1996 J1 ( Evans-Drinkwater ) Nucleus - A The following improved orbital elements, by Kenji Muraoka, are from 131 observations 1996 May 10 to 1997 May 9, perturbations by 9 Planets, Moon and 5 minor planets were taken into account. The mean residual is +/- 0.76 arc seconds. Epoch = 1996 Dec. 23.0 TT JDT = 2450440.5 T = 1996 Dec. 30.44848 +/- 0.00316 (m.e.) TT Peri. = 14.84167 +/- 0.00173 Node = 278.15627 +/- 0.00173 (2000.0) Incl. = 22.51948 +/- 0.00038 q = 1.2978503 +/- 0.0000056 AU e = 1.0010150 +/- 0.0000205 1/a = -0.0007821 +/- 0.0000158 1/AU orig. 1/a = -0.0000829 fut. 1/a = +0.0004871 Comet C/1996 J1 ( Evans-Drinkwater ) Nucleus - B The following improved orbital elements by Kenji Muraoka, are from 501 observations 1996 May 10 to 1998 Nov. 14, perturbations by 9 Planets, Moon and 5 minor planets were taken into account. The mean residual is +/- 0.68 arc seconds. Epoch = 1996 Dec. 23.0 TT JDT = 2450440.5 T = 1996 Dec. 30.41829 +/- 0.00055 (m.e.) TT Peri. = 14.84145 +/- 0.00012 Node = 278.16709 +/- 0.00011 (2000.0) Incl. = 22.51861 +/- 0.00004 q = 1.2975715 +/- 0.0000016 AU e = 1.0009079 +/- 0.0000027 1/a = -0.0006997 +/- 0.0000021 1/AU orig. 1/a = -0.000001 1/AU fut. 1/a = +0.000569 1/AU

Finding Charts 1995 Oct. 10 - 1997 Jan. 2 1997 Jan. 2 - 1998 Apr. 27

Magnitudes Graph m1 = 6.5 + 5 log d + 10.0 log r [ , 0] ( - 1996 Dec. 30) m1 = -0.2 + 5 log d + 27.6 log r [ 0,180] (1996 Dec. 30 - 1997 June 28) m1 = 9.7 + 5 log d + 5.0 log r [180, ] (1997 June 28 - )

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.