From Wikipedia, the free encyclopedia

391 Ingeborg
Modelled shape of Ingeborg from its lightcurve
Discovery  [1]
Discovered by M. F. Wolf
Discovery site Heidelberg 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]

Orbit and classification

Ingeborg orbits the Sun in the inner main-belt at a distance of 1.6–3.0  AU once every 3 years and 6 months (1,291 days). Its orbit has an eccentricity of 0.31 and an inclination of 23 ° with respect to the ecliptic. [1]

Naming

Any reference of this minor planet's name to a person or occurrence is unknown. [3]

Unknown meaning

Among the many thousands of named minor planets, Ingeborg is one of 120 asteroids, for which no official naming citation has been published. All of these low-numbered asteroids have numbers between 164 Eva and 1514 Ricouxa and were discovered between 1876 and the 1930s, predominantly by astronomers Auguste Charlois, Johann Palisa, Max Wolf and Karl Reinmuth. [17]

Physical characteristics

Diameter and albedo

According to the surveys carried out by the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Ingeborg measures between 15.75 and 18.15 kilometers in diameter and its surface has an albedo between 0.282 and 0.495. [6] [7] [8] The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.20 and calculates a diameter of 19.63 kilometers based on an absolute magnitude of 10.9. [5] Other large Mars crossing minor planets include 132 Aethra (43 km), 323 Brucia (36 km), and 2204 Lyyli (25 km).

References

  1. ^ a b c d e f g "JPL Small-Body Database Browser: 391 Ingeborg (1894 BE)" (2017-09-30 last obs.). Jet Propulsion Laboratory. Retrieved 2 November 2017.
  2. ^ (German Names)
  3. ^ a b c d Schmadel, Lutz D. (2007). "(391) Ingeborg". Dictionary of Minor Planet Names. Springer Berlin Heidelberg. p. 47. doi: 10.1007/978-3-540-29925-7_392. ISBN  978-3-540-00238-3.
  4. ^ a b "391 Ingeborg (1894 BE)". Minor Planet Center. Retrieved 2 November 2017.
  5. ^ a b c d e f "LCDB Data for (391) Ingeborg". Asteroid Lightcurve Database (LCDB). Retrieved 2 November 2017.
  6. ^ a b c d e Nugent, C. R.; Mainzer, A.; Masiero, J.; Bauer, J.; Cutri, R. M.; Grav, T.; et al. (December 2015). "NEOWISE Reactivation Mission Year One: Preliminary Asteroid Diameters and Albedos". The Astrophysical Journal. 814 (2): 13. arXiv: 1509.02522. Bibcode: 2015ApJ...814..117N. doi: 10.1088/0004-637X/814/2/117.
  7. ^ a b c d Alí-Lagoa, V.; Delbo', M. (July 2017). "Sizes and albedos of Mars-crossing asteroids from WISE/NEOWISE data". Astronomy and Astrophysics. 603: 8. arXiv: 1705.10263. Bibcode: 2017A&A...603A..55A. doi: 10.1051/0004-6361/201629917.
  8. ^ a b c d Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi; et al. (October 2011). "Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey". Publications of the Astronomical Society of Japan. 63 (5): 1117–1138. Bibcode: 2011PASJ...63.1117U. doi: 10.1093/pasj/63.5.1117. ( online, AcuA catalog p. 153)
  9. ^ a b Wisniewski, W. Z.; Michalowski, T. M.; Harris, A. W.; McMillan, R. S. (March 1995). "Photoelectric Observations of 125 Asteroids". Abstracts of the Lunar and Planetary Science Conference. 26: 1511. Bibcode: 1995LPI....26.1511W.
  10. ^ Behrend, Raoul. "Asteroids and comets rotation curves – (391) Ingeborg". Geneva Observatory. Retrieved 2 November 2017.
  11. ^ Koff, R. A.; Brincat, S. M.; Stephens, R. D.; Pravec, P. (September 2001). "Lightcurve Photometry of Asteroid 391 Ingeborg". The Minor Planet Bulletin. 28: 46–48. Bibcode: 2001MPBu...28...46K.
  12. ^ Hanus, J.; Broz, M.; Durech, J.; Warner, B. D.; Brinsfield, J.; Durkee, R.; et al. (November 2013). "An anisotropic distribution of spin vectors in asteroid families". Astronomy and Astrophysics. 559: 19. arXiv: 1309.4296. Bibcode: 2013A&A...559A.134H. doi: 10.1051/0004-6361/201321993.
  13. ^ Hanus, J.; Durech, J.; Oszkiewicz, D. A.; Behrend, R.; Carry, B.; Delbo, M.; et al. (February 2016). "New and updated convex shape models of asteroids based on optical data from a large collaboration network". Astronomy and Astrophysics. 586: 24. arXiv: 1510.07422. Bibcode: 2016A&A...586A.108H. doi: 10.1051/0004-6361/201527441.
  14. ^ Durech, J.; Hanus, J.; Oszkiewicz, D.; Vanco, R. (March 2016). "Asteroid models from the Lowell photometric database". Astronomy and Astrophysics. 587: 6. arXiv: 1601.02909. Bibcode: 2016A&A...587A..48D. doi: 10.1051/0004-6361/201527573.
  15. ^ Veres, Peter; Jedicke, Robert; Fitzsimmons, Alan; Denneau, Larry; Granvik, Mikael; Bolin, Bryce; et al. (November 2015). "Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results". Icarus. 261: 34–47. arXiv: 1506.00762. Bibcode: 2015Icar..261...34V. doi: 10.1016/j.icarus.2015.08.007.
  16. ^ Pravec, Petr; Harris, Alan W.; Kusnirák, Peter; Galád, Adrián; Hornoch, Kamil (September 2012). "Absolute magnitudes of asteroids and a revision of asteroid albedo estimates from WISE thermal observations". Icarus. 221 (1): 365–387. Bibcode: 2012Icar..221..365P. doi: 10.1016/j.icarus.2012.07.026.
  17. ^ Schmadel, Lutz D. (2007). "Appendix 11 – Minor Planet Names with Unknown Meaning". Dictionary of Minor Planet Names – Fifth Revised and Enlarged revision. Springer Berlin Heidelberg. pp. 927–929. ISBN  978-3-540-00238-3.

External links