55P/Tempel-Tuttle (1998)

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Profile Designation 55P/1997 E1 Recovery Date March 4, 1997 Magnitude 22.5 mag Recoverer K. J. Meech, O. R. Hainaut and J. Bauer (Mauna Kea)

Orbital Elements The following improved orbital elements by Kenji Muraoka, are from 348 observations 1866 to 1998, including 9 planets, and 5 minor planets perturbations and non-gravitational effect of style II. The mean residual is +/- 1.08 arc seconds. Epoch = 1998 Mar. 8.0 TT JDT = 2450880.5 T = 1998 Feb. 28.09752 +/- 0.00011 (m.e.) TT Peri. = 172.49873 +/- 0.00017 Node = 235.25865 +/- 0.00010 (2000.0) Incl. = 162.48615 +/- 0.00002 q = 0.9765761 +/- 0.0000003 AU e = 0.9055183 +/- 0.0000000 a = 10.3361455 +/- 0.0000003 AU n = 0.02965966 +/- 0.00000000 P = 33.231 +/- 0.0000015 years A1 = -0.401 +/- 0.007 A2 = +0.00880 +/- 0.00000

Finding Charts 1997 Sept.29 - 1998 Jan. 27 1998 Jan. 27 - 1998 Aug. 25

Magnitudes Graph m1 = 15.0 + 5 log d + 7.0 log r [ ,-100] ( - 1997 Nov. 20) m1 = 7.5 + 5 log d + 35.0 log r [-100, -40] (1997 Nov. 20 - 1998 Jan. 19) m1 = 8.5 + 5 log d + 20.0 log r [ -40, ] (1998 Jan. 19 - )

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.