110 Lydia

Infobox Planet | discovery=yes | physical_characteristics = yes | bgcolour=#FFFFC0
name=110 Lydia
discoverer=Alphonse Borrelly
discovered=April 19, 1870
alt_names=
mp_category=Main belt
epoch=December 31, 2006 (JD 2454100.5)
semimajor=408.886 Gm (2.733 AU)
perihelion=377.016 Gm (2.520 AU)
aphelion=440.756 Gm (2.946 AU)
eccentricity=0.078
period=1650.493 d (4.52 a)
inclination=5.974°
asc_node=56.993°
arg_peri=281.953°
mean_anomaly=306.394°
avg_speed=17.99 km/s
dimensions=86.1 km
mass=6.7e|17 kg
density=? g/cm³
surface_grav=0.0241 m/s²
escape_velocity=0.0455 km/s
rotation=? d
spectral_type=M
abs_magnitude=7.80
albedo=?
single_temperature=~168 K

110 Lydia is a quite large Main belt asteroid with an M-type spectrum, which may contain nickel-iron. The Lydia asteroid family is named after it. It was discovered by A. Borrelly on April 19, 1870. It was named for the Asia Minor nation of the Phyrigians. [ Schmadel Lutz D. Dictionary of Minor Planet Names (fifth edition), Springer, 2003. ISBN-10: 3540002383.]

In the late 1990s, a network of astronomers worldwide used lightcurves to derive spin states and shape models of 10 new asteroids, including (110) Lydia. [Durech., J.; Kaasalainen, M., Marciniak, A.; et al., “Physical models of ten asteroids from an observers' collaboration network,” Astronomy and Astrophysics, Volume 465, Issue 1, April I 2007, pp. 331-337 ] [ Durech, J.; Kaasalainen, M.; Marciniak, A.; Allen, W. H. et al. “Asteroid brightness and geometry,” Astronomy and Astrophysics, Volume 465, Issue 1, April I 2007, pp. 331-337. ]

Lydia occulted a dim star on September 18, 1999.

References