C/1998 H1 ( Stonehouse )

Japanese version Home page

Updated on December 11, 2022

Profile Discovery Date April 22, 1998 Magnitude 12 mag Discoverer Patrick L. Stonehouse Pictures

Orbital Elements The following improved orbital elements, by Kenji Muraoka are from 352 observations 1998 Apr. 26 to July 20, perturbations by 9 Planets, Moon and 5 minor planets were taken into account. The mean residual is +/- 0.68 arc seconds. Epoch = 1998 Apr. 17.0 TT JDT = 2450920.5 T = 1998 Apr. 14.42482 +/- 0.00074 (m.e.) TT Peri. = 1.32431 +/- 0.00109 Node = 222.10887 +/- 0.00029 (2000.0) Incl. = 104.69219 +/- 0.00113 q = 1.4872838 +/- 0.0000145 AU e = 0.9979059 +/- 0.0001737 1/a = +0.0014080 +/- 0.0001168 1/AU ( P = 18927 years )

Finding Charts

Magnitudes Graph m1 = 9.0 + 5 log d + 15.0 log r(t - 40)

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.