989 Schwassmannia
| Discovery | |
|---|---|
| Discovered by | A. Schwassmann |
| Discovery site | Bergedorf |
| Discovery date | 18 November 1922 |
| Designations | |
| MPC designation | (989) Schwassmannia |
| 1922 MW | |
| Orbital characteristics | |
| 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.
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