122 Gerda

Main-belt asteroid September 2018 yes 000122-asteroid shape model (122) Gerda.png 3D convex shape model of 122 Gerda #D6D6D6 122 Gerda Christian Heinrich Friedrich Peters 31 July 1872 (122) Gerda A872 OA; 1948 TQ 1 ˈ g ɜːr d əNoah Webster (1884) A Practical Dictionary of the English Language Main belt 31 July 2016 (JD 2457600.5) 3.22408 AU Gm on 3.11932 AU Gm on 3.32884 AU Gm on on 0.032493 5.79 yr (2114.5 d) 1.64006° 178.139° 321.617° 163.616° 16.59 km/s 81.69 1.9 km 5.717 kg 0.0228 m/s2 0.0432 km/s 10.685 h d on on10.687 ± 0.001 h S 7.87 0.1883 0.009 ~155 K 0.170253 ms / day 143.71 yr (52491 d) 0 2.13107 AU Gm on 1.66324 AU Gm on 3.187 122 Gerda is a fairly large outer main-belt asteroid that was discovered by German-American astronomer C. H. F. Peters on July 31, 1872. It was named after Gerðr, the wife of the god Freyr in Norse mythology. This asteroid is orbiting the Sun at a distance of 3.22 AU with a low eccentricity of 0.03 and an orbital period of 5.79 years. The orbital plane is inclined at an angle of 1.64° to the plane of the ecliptic. This body is listed as a member of the Hecuba group of asteroids that orbit near the 2:1 mean-motion resonance with Jupiter. Based upon its spectrum, this is classified as a stony S-type asteroid. It has a measured diameter of 82 km. Photometric observations of this asteroid in 2007 were used to produce a light curve that showed that Gerda rotates every 10.6870.001 hours and varied in brightness by 0.16 in magnitude. In 2009, observations at the Organ Mesa Observatory in Las Cruces, New Mexico generated a light curve with a period of 10.7120.01 hours with a brightness variation of 0.11 ± 0.01 magnitudes. This is compatible with previous studies. See also List of minor planets: 1–1000 References Donald K. Yeomans 122 Gerda JPL Small-Body Database Browser NASA Jet Propulsion Laboratory https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=122 12 May 2016 . Robert K. Buchheim Lightcurves for 122 Gerda, 217 Eudora, 631 Phillipina 670 Ottegebe, and 972 Cohnia The Minor Planet Bulletin 34 1 13–14 March 2007 2007MPBu...34...13B . Frederick Pilcher New Lightcurves of 8 Flora, 13 Egeria, 14 Irene, 25 Phocaea 40 Harmonia, 74 Galatea, and 122 Gerda The Minor Planet Bulletin 36 4 133–136 October 2009 2009MPBu...36..133P . McDonald Sophia Levy General perturbations and mean elements, with representations of 35 minor planets of the Hecuba group Astronomical Journal 53 199 June 1948 1948AJ.....53..199M . 10.1086/106097 New polarimetric and spectroscopic evidence of anomalous enrichment in spinel-bearing calcium-aluminium-rich inclusions among L-type asteroids Devogèle M. Tanga P. Cellino A. Bendjoya Ph. Rivet J. -P. Surdej J. Vernet D. Sunshine J. M. Bus S. J. Abe L. Bagnulo S. Borisov G. Campins H. Carry B. Licandro J. McLean W. Pinilla-Alonso N. Icarus 304 31–57 April 2018 1802.06975 2018Icar..304...31D 10.1016/j.icarus.2017.12.026 External links 122 121 Hermione 122 123 Brunhild 000122 Category:Discoveries by Christian Peters Category:Named minor planets 000122 000122 18720731