2003 SS422
| Discovery Perihelion | 39.574 AU | |
|---|---|---|
| 198.181 AU | ||
| Eccentricity | 0.8003140 | |
| 2790 yr | ||
| 1.770° | ||
| 0° 0m 1.272s / day | ||
| Inclination | 16.773° | |
| 150.949° | ||
| 206.824° | ||
| Physical characteristics | ||
Mean diameter | 163 km (est. at 0.09)[3] | |
| 7.04[4] | ||
2003 SS422 is a
Cerro Tololo Observatory in La Serena, Chile, and estimated to measure approximately 168 kilometers (104 miles) in diameter.[1][3]
Due to the object's high eccentricity and large perihelia, 2003 SS422 is an extreme trans-Neptunian object from the scattered disc (ESDO).[3] It was a lost minor planet until it was recovered in June 2021.[4]
Orbit and classification
Based on an
semi-major axis of 198.2 AU). Its orbit has an eccentricity of 0.80 and an inclination of 17° with respect to the ecliptic.[2]
As of 2021[update], 2003 SS422 belongs to a small number of 21 high-eccentricity and large-
extreme scattered disc object, or ESDO. It is thought that objects cannot reach such orbits without some perturbing object outside the eight planets, which has led to the speculation of Planet Nine
.
References
- ^ a b c "2003 SS422". Minor Planet Center. Retrieved 5 March 2021.
- ^ a b c "JPL Small-Body Database Browser: (2003 SS422)" (2020-11-18 last obs.). Jet Propulsion Laboratory. Retrieved 5 March 2021.
- ^ a b c d Johnston, Wm. Robert (18 August 2020). "List of Known Trans-Neptunian Objects". Johnston's Archive. Retrieved 5 March 2021.
- ^ a b c "MPEC 2021-M14 : 2003 SS422". Minor Planet Center. 16 June 2021. Retrieved 16 June 2021.
- ^ "Query (search criteria): objects perihelion min. 38 AU and semimajor axis min. 150 AU (found: 25 objects)". Minor Planet Center. Retrieved 5 March 2021.
External links
- List Of Transneptunian Objects, Minor Planet Center
- List of Known Trans-Neptunian Objects, Johnston's Archive
- 2003 SS422 at the JPL Small-Body Database
