120 Lachesis
Template:Short description Template:Use mdy dates Template:Infobox planet
120 Lachesis is a large main-belt asteroid. It was discovered by French astronomer Alphonse Borrelly on April 10, 1872, and independently by German-American astronomer Christian Heinrich Friedrich Peters on April 11, 1872, then named after Lachesis, one of the Moirai, or Fates, in Greek mythology.<ref name="Schmadel2003"/> A Lachesean occultation of a star occurred in 1999 and was confirmed visually by five observers and once photoelectrically, with the chords yielding an estimated elliptical cross-section of Template:Nowrap.<ref name="Dunham2002"/>
This body is orbiting the Sun with a period of 5.50 years and an eccentricity (ovalness) of 0.05. The orbital plane is inclined by 7° to the plane of the ecliptic. Photometric observations of this asteroid were made in early 2009 at the Organ Mesa Observatory in Las Cruces, New Mexico. The resulting light curve shows a synodic rotation period of 46.551 ± 0.002 hours with a brightness variation of 0.14 ± 0.02 in magnitude.<ref name="Pilcher2009"/> It is a very slow rotator<ref name=Bembrick2005/> with the longest rotation period of an asteroid more than 150 km in diameter.<ref name="SBDB"/> As a primitive C-type asteroid<ref name="Tedesco1989"/> it is probably composed of carbonaceous material.
References
External links
Template:Minor planets navigator Template:Navbox Template:Authority control