391 Ingeborg
| Discovery | |
|---|---|
| Discovered by | Max Wolf |
| Discovery date | 1 November 1894 |
| Designations | |
| 1894 BE | |
| Mars-crossing asteroid[1][2] | |
| Orbital characteristics[1] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 121.40 yr (44342 d) |
| Aphelion | 3.03005 AU (453.289 Gm) |
| Perihelion | 1.61382 AU (241.424 Gm) |
| 2.32194 AU (347.357 Gm) | |
| Eccentricity | 0.30497 |
| 3.54 yr (1292.3 d) | |
Average orbital speed | 19.09 km/s |
| 180.930° | |
| 0° 16m 42.838s / day | |
| Inclination | 23.1804° |
| 212.891° | |
| 146.862° | |
| Earth MOID | 0.646494 AU (96.7141 Gm) |
| Jupiter MOID | 2.53939 AU (379.887 Gm) |
| Jupiter Tisserand parameter | 3.411 |
| Physical characteristics | |
| Dimensions | 18 - 40 km[3] |
| Mass | unknown |
Mean density | unknown |
Equatorial surface gravity | unknown |
Equatorial escape velocity | unknown |
| 26.391 h (1.0996 d)[1] | |
| unknown | |
| Temperature | unknown |
| 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 (43 km), 323 Brucia (36 km), and 2204 Lyyli (25 km).
References
- 1 2 3 4 5 "JPL Small-Body Database Browser: 391 Ingeborg (1894 BE)". Jet Propulsion Laboratory. Retrieved 10 May 2016.
- 1 2 "(391) Ingeborg = A894BE = 1934 A". IAU Minor Planet Center. Retrieved 2014-06-23.
- 1 2 "Absolute Magnitude (H)". NASA/JPL. Retrieved 2014-06-24.
External links
- AstDys entry on 391 Ingeborg
- 391 Ingeborg at the JPL Small-Body Database
- telnet://ssd.jpl.nasa.gov:6775 telnet for JPL Horizons, easier and more comprehensive than web version
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