331 Etheridgea

Etheridgea (minor planet designation: 331 Etheridgea) is a large main belt asteroid.[1] It was discovered by Auguste Charlois on 1 April 1892 in Nice.

331 Etheridgea

Discovery
Discovered by	Auguste Charlois
Discovery date	1 April 1892
Designations
MPC designation	(331) Etheridgea
Pronunciation	/ˌɛθəˈrɪdʒiə/
Minor planet category	Main belt
Orbital characteristics[1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc	123.95 yr (45274 d)
Aphelion	3.32623 AU (497.597 Gm)
Perihelion	2.72055 AU (406.988 Gm)
Semi-major axis	3.02339 AU (452.293 Gm)
Eccentricity	0.10016
Orbital period	5.26 yr (1920.2 d)
Mean anomaly	88.5392°
Mean motion	0° 11^m 14.939^s / day
Inclination	6.05385°
Longitude of ascending node	22.0346°
Argument of perihelion	333.055°
Physical characteristics
Dimensions	74.92±2.7 km
Rotation period	25.315 h (1.0548 d)
Geometric albedo	0.0447±0.003
Absolute magnitude (H)	9.62

References

1. "331 Etheridgea". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 11 May 2016.

External links

• Lightcurve plot of 331 Etheridgea, Palmer Divide Observatory, B. D. Warner (1999)
• Asteroid Lightcurve Database (LCDB), query form (info)
• Dictionary of Minor Planet Names, Google books
• Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
• Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
• 331 Etheridgea at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 331 Etheridgea at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters