281 Lucretia

281 Lucretia

A three-dimensional model of 281 Lucretia based on its light curve.
Discovery
Discovered by	Johann Palisa
Discovery date	October 31, 1888
Designations
Named after	Caroline Lucretia Herschel
Alternative names	A906 FD; 1948 EK; 1984 JX
Minor planet category	Main belt (Flora family)
Orbital characteristics
Epoch 30 January 2005 (JD 2453400.5)
Aphelion	370.638 Gm (2.478 AU)
Perihelion	283.953 Gm (1.898 AU)
Semi-major axis	327.295 Gm (2.188 AU)
Eccentricity	0.132
Orbital period	1181.985 d (3.24 a)
Average orbital speed	20.14 km/s
Mean anomaly	323.188°
Inclination	5.308°
Longitude of ascending node	31.502°
Argument of perihelion	16.288°
Physical characteristics
Dimensions	12 km [1]
Mass	~2×10^15 (estimate)
Mean density	~2.7 g/cm³ (estimate) [2]
Surface gravity	~0.004 m/s² (estimate)
Escape velocity	~0.007 km/s (estimate)
Rotation period	0.181 d (4.348 h) [3]
Albedo	0.199 [1]
Temperature	~183 K max: 277 K (+4°C)
Spectral type	S [4]
Absolute magnitude (H)	12.02

281 Lucretia is an asteroid belonging to the Flora family in the Main Belt.

It was discovered by Johann Palisa on October 31, 1888 in Vienna. It is named for the middle name of Caroline Herschel, one of the first female astronomers.

References

1. Supplemental IRAS Minor Planet Survey
2. G. A. Krasinsky; et al. (2002). "Hidden Mass in the Asteroid Belt". Icarus 158: 98. Bibcode:2002Icar..158...98K. doi:10.1006/icar.2002.6837.
3. PDS lightcurve data Archived June 14, 2006, at the Wayback Machine.
4. "Asteroid Taxonomy". Planetary Science Institute. Retrieved 2016-02-27.

External links

• 281 Lucretia at the JPL Small-Body Database

• Discovery · Orbit diagram · Orbital elements · Physical parameters