58 Concordia

58 Concordia

Orbital diagram
Discovery
Discovered by	Karl Theodor Robert Luther
Discovery date	March 24, 1860
Designations
MPC designation	(58) Concordia
Pronunciation	/kənˈkɔːrdiə/[1]
Named after	Concordia
Minor planet category	Main belt Nemesis
Adjectives	Concordian
Orbital characteristics
Epoch December 31, 2006 (JD 2454100.5)
Aphelion	2.818 AU (421.526 Gm)
Perihelion	2.583 AU (386.457 Gm)
Semi-major axis	2.701 AU (403.991 Gm)
Eccentricity	0.043
Orbital period (sidereal)	4.44 a (1620.946 d)
Mean anomaly	15.122°
Inclination	5.057°
Longitude of ascending node	161.290°
Argument of perihelion	34.465°
Physical characteristics
Dimensions	93.4 km
Mass	~5.89×10^17 kg (calculated)
Mean density	1.38 g/cm^3 (assumed)[2]
Synodic rotation period	9.895±0.001 h[3]
Geometric albedo	0.058[4]
Spectral type	C
Absolute magnitude (H)	8.86

58 Concordia is a fairly large main-belt asteroid that is orbiting the Sun with a period of 4.44 years, a semimajor axis of 2.7 AU, and a low eccentricity of 0.043. It is classified as a C-type asteroid, meaning that its surface is very dark and it is likely carbonaceous in composition. The surface spectra displays indications of hydrated minerals created through aqueous alteration.[5] The object is rotating with a sidereal period of 9.894541 h and pole orientations of (15.3°±0.7°, −4.2°±2.6°) and (195.9°±1.0°, 4.8°±1.2°).[6] It belongs to the Hungaria family of asteroids and has a satellite with an orbital period of 14.29 h.[3]^[dubious – discuss]

Concordia was discovered by German astronomer Robert Luther on March 24, 1860. At Luther's request, it was named by Carl Christian Bruhns of the University of Leipzig after Concordia, the Roman goddess of harmony.[7]

References

1. "Concordia". Dictionary.com Unabridged (Online). n.d.
2. Krasinsky, G. A.; Pitjeva, E. V.; Vasilyev, M. V.; Yagudina, E. I. (1 July 2002). "Hidden Mass in the Asteroid Belt". Icarus. 158 (1): 98–105. Bibcode:2002Icar..158...98K. doi:10.1006/icar.2002.6837 – via NASA ADS.
3. Pilcher, Frederick (October 2016), "Rotation Determinations for 50 Virginia, 58 Concordia 307 Nike, and 339 Dorothea", The Minor Planet Bulletin, 43 (4): 304–306, Bibcode:2016MPBu...43..304P.
4. "Asteroid Data Sets". Archived from the original on 17 December 2009.
5. Fornasier, S.; et al. (May 2014), "Aqueous alteration on main belt primitive asteroids: Results from visible spectroscopy", Icarus, 233: 163–178, arXiv:1402.0175, Bibcode:2014Icar..233..163F, doi:10.1016/j.icarus.2014.01.040.
6. Jiang, P. F.; Wang, X. B. (September 2018), "Photometric Study on Asteroid (58) Concordia", Acta Astronomica Sinica, 59 (5): 46, Bibcode:2018AcASn..59...46J, 46.
7. Schmadel, Lutz D. (2003). Dictionary of Minor Planet Names. Springer Science & Business Media. p. 20. ISBN 978-3-540-00238-3.

External links

• 58 Concordia at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 58 Concordia at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters