(91133) 1998 HK151
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- The correct title of this article is (91133) 1998 HK151. It features superscript or subscript characters that are substituted or omitted because of technical limitations.
| Discovery A | |
|---|---|
| Discoverer | Mauna Kea Observatory |
| Discovery date | April 28, 1998 |
| Alternate designations B |
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| Category | plutino (TNO) |
| Orbital elements C | |
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| Eccentricity (e) | 0.2343 |
| Semi-major axis (a) | 39.691 AU |
| Perihelion (q) | 30.388 AU |
| Aphelion (Q) | 48.995 AU |
| Orbital period (P) | 249.95 years |
| Mean orbital speed | |
| Inclination (i) | 5.932° |
| Longitude of the ascending node (Ω) |
50.2° |
| Argument of perihelion (ω) |
181.3° |
| Mean anomaly (M) | 11.9° |
| Physical characteristics D | |
| Dimensions | 85-190km H |
| Mass | |
| Density | |
| Surface gravity | |
| Escape velocity | |
| Rotation period | |
| Spectral class | (Blueish;lowest TNO B-V) B-V=0.51; V-R=0.43 |
| Absolute magnitude | 7.62 |
| Albedo (geometric) | |
| Mean surface temperature |
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(91133) 1998 HK151 (better known as 1998 HK151) is a plutino with a 2:3 resonance with Neptune. It was discovered on April 28, 1998, by the Mauna Kea Observatory.
1998 HK151 has the lowest, and thus bluest measured B-V color index of any TNO. On May 24th, 2000, 1998 HK151 set a TNO record low B-V of 0.51. Reddening of the spectrum is caused by cosmic irradiaton by ultraviolet radiation and charged particles. Becoming bluer in the spectrum is caused by impact collisions exposing the interior of an object.
Based on an absolute magnitude (H) of 7.62, 1998 HK151 is estimated to be between 85 - 190km in diameter.
[edit] External links
- Orbital simulation from JPL (Java) / Ephemeris
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