1484 Postrema
"Postrema" redirects here. For the structure in the brain that controls vomiting, see area postrema.
| Discovery | |
|---|---|
| Discovered by | G. Neujmin |
| Discovery site | Simeis |
| Discovery date | 29 April 1938 |
| Designations | |
| MPC designation | 1484 |
| 1938 HC | |
| Orbital characteristics[1] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 83.15 yr (30371 days) |
| Aphelion | 3.2970171 AU (493.22674 Gm) |
| Perihelion | 2.1809656 AU (326.26781 Gm) |
| 2.738991 AU (409.7472 Gm) | |
| Eccentricity | 0.2037340 |
| 4.53 yr (1655.7 d) | |
| 107.34261° | |
| 0° 13m 2.745s / day | |
| Inclination | 17.29948° |
| 72.77927° | |
| 126.73867° | |
| Earth MOID | 1.21816 AU (182.234 Gm) |
| Jupiter MOID | 1.82576 AU (273.130 Gm) |
| Jupiter Tisserand parameter | 3.256 |
| Physical characteristics | |
| Dimensions | 43 km[1] |
Mean radius | 21.59±0.5 km |
| 12.1923 h (0.50801 d) | |
Sidereal rotation period | 12.19 hr[1] |
| 0.0137±0.001[1] | |
| B[1] | |
| 10.8[1] | |
|
| |
1484 Postrema (1938 HC) is a main-belt asteroid discovered on April 29, 1938, by G. Neujmin at Simeis. With an albedo of 0.01, it is one of the darkest asteroids known.[1] It is a B-type asteroid.[1]
References
External links
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