222 Lucia

222 Lucia

A three-dimensional model of 222 Lucia based on its light curve.
Discovery
Discovered by	Johann Palisa
Discovery date	9 February 1882
Designations
Alternative names	A899 EC, A919 AB
Minor planet category	Main belt (Themis)
Orbital characteristics[1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc	117.10 yr (42769 d)
Aphelion	3.5529 AU (531.51 Gm)
Perihelion	2.7296 AU (408.34 Gm)
Semi-major axis	3.1412 AU (469.92 Gm)
Eccentricity	0.13105
Orbital period	5.57 yr (2033.5 d)
Average orbital speed	16.82 km/s
Mean anomaly	349.267°
Mean motion	0° 10^m 37.308^s / day
Inclination	2.1494°
Longitude of ascending node	80.141°
Argument of perihelion	180.953°
Earth MOID	1.71397 AU (256.406 Gm)
Jupiter MOID	1.50631 AU (225.341 Gm)
Jupiter Tisserand parameter	3.196
Physical characteristics
Dimensions	54.66±3.9 km
Rotation period	7.80 h (0.325 d)
Geometric albedo	0.1318±0.021
Spectral type	C?
Absolute magnitude (H)	9.13

222 Lucia is a large Themistian asteroid. It was discovered by Johann Palisa on February 9, 1882 in Vienna and named after Lucia, daughter of Austro-Hungarian explorer Graf Wilczek.

This object is spectral C-type and is probably composed of primitive carbonaceous material. Based upon analysis of infrared spectra, it has a diameter of 59.8 ± 0.8 km. This object belongs to the Themis family, which was formed by the break-up of a larger parent body about a billion years ago.^[2]

References

1. "222 Lucia". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 12 May 2016.
2. Lagoa, V. Alí; et al., "5-14 μm Spitzer spectra of Themis family asteroids", Astronomy & Astrophysics, 537: A73, Bibcode:2012A&A...537A..73L, doi:10.1051/0004-6361/201118142.

External links

• The Asteroid Orbital Elements Database
• Minor Planet Discovery Circumstances
• Asteroid Lightcurve Data File
• 222 Lucia at the JPL Small-Body Database
  
  • Discovery · Orbit diagram · Orbital elements · Physical parameters