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Discovery
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|---|---|
| Discovered by | A. Gleason |
| Discovery date | September 23, 1998 |
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Designations
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| MPC designation | (35671) 1998 SN165 |
| Alternate name(s) | none |
| Minor planet category |
TNO[1][2] Cubewano[1] |
| Aphelion | 39.380 AU |
| Perihelion | 36.288 AU |
| Semi-major axis | 37.834 AU |
| Eccentricity | 0.041 |
| Orbital period | 233.66 yr |
| Mean anomaly | 271.1° |
| Inclination | 4.6° |
| Longitude of ascending node | 192.1° |
| Argument of perihelion | 266.5° |
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Physical characteristics
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| Dimensions | 460±80[4][5] km |
| Albedo | 0.04[4] |
| Apparent magnitude | 21.4 |
| Absolute magnitude (H) | 5.8[3] |
(35671) 1998 SN165, also written as (35671) 1998 SN165, is a trans-Neptunian object. It was discovered on September 23, 1998 by A. Gleason at Steward Observatory.
It was originally classified as a plutino with a 2:3 mean motion resonance with Neptune. In August 2001 it was still the largest Plutino, other than Pluto and Charon, so far identified.[6] But later plutino discoveries, such as 38628 Huya,[5] 28978 Ixion, and 90482 Orcus are larger. It is no longer classified as a plutino.[1][2][5]
With a low albedo of 0.04[4] and an absolute magnitude of 5.8,[3] 1998 SN165 has the dimmest absolute magnitude that may qualify as a plutoid candidate.[7]
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