989 Schwassmannia

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989 Schwassmannia
Discovery
Discovered byA. Schwassmann
Discovery siteBergedorf
Discovery date18 November 1922
Designations
MPC designation(989) Schwassmannia
1922 MW
Orbital characteristics[1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc93.39 yr (34111 days)
Aphelion3.3259 AU (497.55 Gm)
Perihelion1.9914 AU (297.91 Gm)
2.6587 AU (397.74 Gm)
Eccentricity0.25096
4.34 yr (1583.4 d)
216.40°
0° 13m 38.496s / day
Inclination14.700°
243.405°
165.858°
Physical characteristics
Mean radius
6.43±0.4 km
107.85 h (4.494 d)
0.2035±0.027
11.9

989 Schwassmannia is a minor planet orbiting the Sun.

References[edit]

  1. ^ "989 Schwassmannia (1922 MW)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 2 May 2016.

External links[edit]