139P/Vaisala-Oterma (1998)

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Updated on July 11, 1999

Profile Designation 139P/1998 WG22 Rediscovery Date Nov. 18, 1998 Magnitude 19.0 mag Rediscoverer Lincoln Laboratory Near-Earth Asteroid Research project Pictures

Orbital Elements The following improved orbital elements by Kenji Muraoka, are from 86 observations 1939 to 1999, perturbations by 9 Plantes, Moon and 5 minor planets were taken into account. The mean residual is +/- 0.82 arc seconds. Epoch = 1998 Sept. 24.0 TT JDT = 2451080.5 T = 1998 Sept. 28.80925 +/- 0.04745 (m.e.) TT Peri. = 165.54767 +/- 0.01960 Node = 242.46830 +/- 0.01086 (2000.0) Incl. = 2.33247 +/- 0.00036 q = 3.3814917 +/- 0.0000700 AU e = 0.2483321 +/- 0.0000187 a = 4.4986515 +/- 0.0000323 AU n = 0.10329530 +/- 0.00000111 P = 9.542 +/- 0.0001029 years

Finding Charts

Magnitudes Graph m1 = 11.0 + 5 log d + 10.0 log r

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.