C/1995 Y1 ( Hyakutake )

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Updated on February 2, 1997

Profile Discovery Date December 25, 1995 Magnitude 10.5 mag Discoverer Yuji Hyakutake (Japan)

Orbital Elements The following improved orbital elements, by Kenji Muraoka, are from 240 observations 1995 Dec. 26 to 1996 Sept. 21, including 9 Planets, Moon and 5 minor planets perturbations and non-gravitational effect of style II. The mean residual is +/- 0.72 arc seconds. Epoch = 1996 Feb. 7.0 TT JDT = 2450120.5 T = 1996 Feb. 24.28741 +/- 0.00030 (m.e.) TT Peri. = 46.34885 +/- 0.00050 Node = 195.76126 +/- 0.00011 (2000.0) Incl. = 54.46586 +/- 0.00005 q = 1.0546139 +/- 0.0000058 AU e = 1.0002436 +/- 0.0000131 1/a = -0.0002310 +/- 0.0000125 1/AU A1 = +0.49 +/- 0.20 A2 = -0.9498 +/- 0.0701

Finding Charts 1995 Aug. 1 - 1996 Feb. 27 1995 Nov. 20 - 1996 Oct. 4

Magnitudes Graph m1 = 7.4 + 5 log d + 12.5 log r [ ,90] ( - 1996 May 24) m1 = 10.3 + 5 log d + 13.5 log r [90, ] (1996 May 24 - )

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.