391 Ingeborg
| Discovery | |
|---|---|
| Discovered by | Max Wolf |
| Discovery date | November 1, 1894 |
| Designations | |
| 1894 BE | |
| Mars crosser[1][2] | |
| Orbital characteristics | |
| Epoch 30 January 2005 (JD 2453400.5) | |
| Aphelion | 453.512 Gm (3.032 AU) |
| Perihelion | 240.489 Gm (1.608 AU) |
| 347.0 Gm (2.32 AU) | |
| Eccentricity | 0.307 |
| 1290.318 d (3.53 a) | |
Average orbital speed | 19.09 km/s |
| 90.212° | |
| Inclination | 23.17° |
| 213.006° | |
| 146.554° | |
| Physical characteristics | |
| Dimensions | 18 - 40 km[3] |
| Mass | unknown |
Mean density | unknown |
| unknown | |
| unknown | |
| 26.4 h[1] | |
| Albedo | unknown |
| Temperature | unknown |
Spectral type | S |
| 10.8[1] | |
|
| |
391 Ingeborg is a relatively large Mars-crossing asteroid that was discovered by Max Wolf on November 1, 1894 at Heidelberg observatory. When discovered the asteroid was observed for a couple of weeks, and follow-up observations were made in 1901 and 1904.[2]
With an absolute magnitude of 10.8,[1] the asteroid is about 18–40 km in diameter.[3] Other large Mars crossing minor planets include 132 Aethra (43km), 323 Brucia (36km), and 2204 Lyyli (25km).
References
- ↑ 1.0 1.1 1.2 1.3 "JPL Small-Body Database Browser: 391 Ingeborg (1894 BE)". Jet Propulsion Laboratory.
- ↑ 2.0 2.1 "(391) Ingeborg = A894BE = 1934 A". IAU Minor Planet Center. Retrieved 2014-06-23.
- ↑ 3.0 3.1 "Absolute Magnitude (H)". NASA/JPL. Retrieved 2014-06-24.
External links
- telnet://ssd.jpl.nasa.gov:6775 telnet for JPL Horizons, easier and more comprehensive than web version
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