391 Ingeborg

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391 Ingeborg
Discovery
Discovered by Max Wolf
Discovery date 1 November 1894
Designations
MPC designation (391) Ingeborg
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)
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[edit]

  1. ^ a b c d e "JPL Small-Body Database Browser: 391 Ingeborg (1894 BE)". Jet Propulsion Laboratory. Retrieved 10 May 2016. 
  2. ^ a b "(391) Ingeborg = A894BE = 1934 A". IAU Minor Planet Center. Retrieved 2014-06-23. 
  3. ^ a b "Absolute Magnitude (H)". NASA/JPL. Retrieved 2014-06-24. 

External links[edit]