238 Hypatia
| Discovery | |
|---|---|
| Discovered by | Viktor Knorre |
| Discovery date | July 1, 1884 |
| Designations | |
|
Named after
|
Hypatia |
| 1947 HA | |
| Main belt | |
| Orbital characteristics[1] | |
| Epoch 30 January 2005 (JD 2453400.5) | |
| Aphelion | 3.164 AU |
| Perihelion | 2.648 AU |
| 2.906 AU | |
| Eccentricity | 0.089 |
| 1809.596 d (4.95 yr) |
|
|
Average orbital speed
|
17.47 km/s |
| 59.101° | |
| Inclination | 12.408° |
| 184.2° | |
| 206.935° | |
| Physical characteristics | |
| Dimensions | 146.13 ± 2.66[2] km |
| Mass | (4.90 ± 1.70) × 1018[2] kg |
|
Mean density
|
2.99 ± 1.05[2] g/cm3 |
| 8.86 h | |
| Albedo | 0.042 |
|
Spectral type
|
C |
| 8.18 | |
238 Hypatia is a very large main-belt asteroid that was discovered by Russian astronomer Viktor Knorre on July 1, 1884, in Berlin. It was the third of his four asteroid discoveries. The name was given in honour of philosopher Hypatia of Alexandria. Based upon the spectrum, it is classified as a C-type asteroid[3] and is probably composed of primitive carbonaceous material. Like many asteroids of this type, its surface is very dark in colour.
Photometric observations of this asteroid at the European Southern Observatory in 1981 gave a light curve with a period of 8.9 ± 0.1 hours and a brightness variation of 0.12 in magnitude.[4]
References
External links
- The Asteroid Orbital Elements Database
- Minor Planet Discovery Circumstances
- Asteroid Lightcurve Data File
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