143 Adria

143 Adria

Discovery[1]
Discovered by	Johann Palisa
Discovery date	February 23, 1875
Designations
Named after	Adriatic Sea
Minor planet category	Main belt
Orbital characteristics
Epoch December 31, 2006 (JD 2454100.5)
Aphelion	442.325 Gm (2.957 AU)
Perihelion	384.207 Gm (2.568 AU)
Semi-major axis	413.266 Gm (2.763 AU)
Eccentricity	0.070
Orbital period	1677.083 d (4.59 a)
Average orbital speed	17.90 km/s
Mean anomaly	196.062°
Inclination	11.469°
Longitude of ascending node	333.233°
Argument of perihelion	250.984°
Physical characteristics
Dimensions	89.9 km
Mass	7.6×1017 kg
Mean density	2.0 g/cm³
Equatorial surface gravity	0.0251 m/s²
Equatorial escape velocity	0.0475 km/s
Rotation period	22.005 h
Geometric albedo	0.10
Temperature	~167 K
Spectral type	C
Absolute magnitude (H)	9.12

143 Adria is a fairly large main-belt asteroid that was discovered by Austrian astronomer J. Palisa on February 23, 1875, at Pula, and named after the Adriatic Sea, on the coast of which the discovery was made. This dark-coloured asteroid has probably a primitive carbonaceous chondritic composition.

One occultation by Adria has been reported so far, from Japan on August 21, 2000. A somewhat spherical shape measuring 98 × 86 km was observed.

Photometric observations of this asteroid made during 2008 at the Organ Mesa Observatory in Las Cruces, New Mexico gave an irregular light curve with a period of 22.005 ± 0.001 hours and a brightness variation of 0.08 ± 0.01 in magnitude.

External links

• ftp://ftp.lowell.edu/pub/elgb/astorb.html