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| Discovery A | |
|---|---|
| Discoverer | Jane X. Luu, Chadwick A. Trujillo, David J. Tholen, and David C. Jewitt |
| Discovery date | April 28, 1998 |
| Alternate designations B |
none |
| Category | TNO (cubewano) |
| Orbital elements C | |
|
|
|
| Eccentricity (e) | 0.052 |
| Semi-major axis (a) | 6524.567172 Gm (43.614 AU) |
| Perihelion (q) | 6184.231722 Gm (41.339 AU) |
| Aphelion (Q) | 6864.902622 Gm (45.889 AU) |
| Orbital period (P) | d a |
| Mean orbital speed | |
| Inclination (i) | 2.4° |
| Longitude of the ascending node (Ω) |
50.4° |
| Argument of perihelion (ω) |
133.0° |
| Mean anomaly (M) | 53.5° |
| Physical characteristics D | |
| Dimensions | 139 km[1] |
| Mass | |
| Density | |
| Surface gravity | |
| Escape velocity | |
| Rotation period | |
| Spectral class | |
| Absolute magnitude | 7.5 |
| Albedo (geometric) | |
| Mean surface temperature |
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(24978) 1998 HJ151, also written as (24978) 1998 HJ151, is a cubewano. It has a perihelion (closest approach to the Sun) at 41.339 AU and an aphelion (farthest approach to the Sun) at 45.889 AU. It has a diameter of about 139 km. It was discovered on April 28, 1998 by Jane X. Luu, Chadwick A. Trujillo, David J. Tholen and David C. Jewitt.
1 ^http://cfa-www.harvard.edu/iau/lists/TNOs.html
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