391 Ingeborg

391 Ingeborg
Modelled shape of Ingeborg from its lightcurve
Discovery [1]
Discovered byM. F. Wolf
Discovery siteHeidelberg Obs.
Discovery date1 November 1894
Designations
(391) Ingeborg
PronunciationGerman: [ˈɪŋəbɔʁk][2]
Named after
unknown (Ingeborg)[3]
1894 BE · 1934 AJ
A894 VB
Mars-crosser [1][4][5]
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc122.86 yr (44,875 days)
Aphelion3.0285 AU
Perihelion1.6120 AU
2.3203 AU
Eccentricity0.3052
3.53 yr (1,291 days)
292.16°
0° 16m 44.04s / day
Inclination23.202°
212.88°
147.06°
Mars MOID0.2350 AU
Physical characteristics
Dimensions15.75±3.05 km[6]
17.33±1.73 km[7]
18.15±0.19 km[8]
19.63 km (calculated)[5]
16 h[9]
26.39±0.02 h[10]
26.391±0.006 h[11]
26.4145±0.0005 h[12]
26.4146±0.0005 h[13]
26.4149±0.0001 h[14]
0.20 (assumed)[5]
0.282±0.056[7]
0.290±0.110[6]
0.34±0.16[6]
0.495±0.013[8]
Tholen = S [1]
SMASS = S [1][5]
10.10[8] · 10.21±0.81[15] · 10.80[1][6][7] · 10.9[5] · 10.9±0.2[16][9]

391 Ingeborg (prov. designation: A894 VB or 1894 BE) is an asteroid and second-largest Mars-crosser on an eccentric orbit from the asteroid belt. It was discovered by German astronomer Max Wolf on 1 November 1894, at the Heidelberg Observatory in southwest Germany. When discovered, it was observed for a couple of weeks, and follow-up observations were made in 1901 and 1904.[3][4] The stony S-type asteroid has a rotation period of 26.4 hours and measures approximately 17 kilometers (11 miles) in diameter. Any reference of the asteroid's name to a person is unknown.[3]

  1. ^ a b c d e f Cite error: The named reference jpldata was invoked but never defined (see the help page).
  2. ^ (German Names)
  3. ^ a b c Cite error: The named reference springer was invoked but never defined (see the help page).
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  5. ^ a b c d e Cite error: The named reference lcdb was invoked but never defined (see the help page).
  6. ^ a b c d Cite error: The named reference Nugent-2015 was invoked but never defined (see the help page).
  7. ^ a b c Cite error: The named reference Ali-Lagoa-2017 was invoked but never defined (see the help page).
  8. ^ a b c Cite error: The named reference AKARI was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference Wisniewski-1997 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference geneva-obs was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Koff-2001b was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference Hanus-2013c was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference Hanus-2016a was invoked but never defined (see the help page).
  14. ^ Cite error: The named reference Durech-2016 was invoked but never defined (see the help page).
  15. ^ Cite error: The named reference Veres-2015 was invoked but never defined (see the help page).
  16. ^ Cite error: The named reference Pravec-2012b was invoked but never defined (see the help page).