42 Isis
Template:Short description Template:Use dmy dates Template:Infobox planet
42 Isis is a large main-belt asteroid, measuring 100.2 km in diameter with a stony (S-type) composition. It was discovered by English astronomer N.R. Pogson on 23 May 1856 at Oxford, and was his first asteroid discovery. The asteroid's name was chosen by Manuel John Johnson, director of the Radcliffe Observatory in Oxford. Although Isis is the name of an Egyptian goddess, the name was chosen in homage to Pogson's astronomer daughter, (Elizabeth) Isis Pogson.<ref name=Bruck2009/> In addition, the Isis is the stretch of the River Thames that runs through Oxford.<ref>Template:Cite book</ref>
This asteroid is orbiting the Sun with a period of 3.82 years. The light curve inversion technique, when applied to photometric observations of this asteroid, show multiple local irregularities. The overall shape displays little elongation, with a ratio between the major and minor axes equal to 1.1. The measured rotation period for this model is 13.6 hours.<ref name="Torppa2003"/> The spectrum of 42 Isis reveals the strong presence of the mineral olivine, a relative rarity in the asteroid belt.<ref name="Burbine2000"/>
References
External links
Template:Minor planets navigator Template:Navbox Template:Authority control