989 Schwassmannia

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989 Schwassmannia
Discovery
Discovered by A. Schwassmann
Discovery site Bergedorf
Discovery date 18 November 1922
Designations
MPC designation (989) Schwassmannia
1922 MW
Orbital characteristics[1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc 93.39 yr (34111 days)
Aphelion 3.3259 AU (497.55 Gm)
Perihelion 1.9914 AU (297.91 Gm)
2.6587 AU (397.74 Gm)
Eccentricity 0.25096
4.34 yr (1583.4 d)
216.40°
0° 13m 38.496s / day
Inclination 14.700°
243.405°
165.858°
Earth MOID 1.00398 AU (150.193 Gm)
Jupiter MOID 2.06966 AU (309.617 Gm)
Jupiter Tisserand parameter 3.296
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]

External links[edit]