113 Amalthea

Main-belt asteroid Amalthea (moon), one of the moons of Jupiter October 2018 yes #D6D6D6 113 Amalthea Орбита астероида 113.png Orbital diagram R. Luther Bilk Obs. 12 March 1871 (113) Amalthea A871 EA; 1931 TN 3;1951 CY æ m əl ' θ iː ə Amalthea main-beltFlora 31 July 2016 (JD 2457600.5) 144.90 yr (52926 d) 0 2.37598 AU Gm on 2.17010 AU Gm on 2.5819 AU Gm on on 0.086651 3.66 yr (1337.7 d) 5.0422° 123.486° 79.118° 226.48° 0.26912 ms / day 46.14 1.4 km 9.950 h d on on 0.2649 0.017 S 8.74 113 Amalthea (æ m əl ' θ iː ə) is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 50 km mi off us in diameter. It was discovered on 12 March 1871, by German astronomer Robert Luther at the Bilk Observatory in Düsseldorf, Germany. The elongated S-type asteroid has a rotation period of 9.95 hours. It was named after Amalthea from Greek mythology. A purported satellite of Amalthea was announced in July 2017, but was later found to be a software error in July 2021. Description Amalthea is thought to be a fragment from the mantle of a Vesta-sized, 300–600 km diameter parent body that broke up around one billion years ago, with the other major remnant being 9 Metis. The spectrum of Amalthea reveals the presence of the mineral olivine, a relative rarity in the asteroid belt. Based on observations made during a stellar occultation by Amalthea of a 10th-magnitude star on 14 March 2017, it was announced in July 2017 that the asteroid has a small, 5-kilometer-sized satellite, provisionally designated S/2017 (113) 1. However, the satellite was later retracted as a software-reduction coding error on 17 July 2021.RETRACTION OF REPORT ON (113) AMALTHEA http://www.cbat.eps.harvard.edu/iau/cbet/005000/CBET005002.txt Daniel W. E. Green Central Bureau Electronic Telegrams Central Bureau for Astronomical Telegrams 17 July 2021 17 February 2022 The occultation also indicated that Amalthea has a distinctly elongated shape.Beatty Kelly Amateur Observers Find an Asteroid's Moon http://www.skyandtelescope.com/astronomy-news/amateur-observers-discover-asteroid-moon/ Sky & Telescope 15 July 2017 One of Jupiter's inner small satellites, unrelated to 113 Amalthea, is also called Amalthea, as is an (apparently fictional) small Arjuna asteroid in Neal Stephenson's 2015 novel Seveneves. References Donald K. Yeomans 113 Amalthea JPL Small-Body Database Browser NASA Jet Propulsion Laboratory https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=113 12 May 2016 . Michael S. Kelley Michael J. Gaffey 9 Metis and 113 Amalthea: A Genetic Asteroid Pair Icarus 35 144 27–38 March 2000 10.1006/icar.1999.6266 2000Icar..144...27K . E. A. Cloutis Olivine-rich asteroids, pallasitic olivine and olivine-metal mixtures: Comparisons of reflectance spectra Lunar and Planetary Institute, Twenty-fourth Lunar and Planetary Science Conference. Part 1: A-F 317–318 March 1993 1993LPI....24..317C . T. H. Burbine E. Bowden T. Ogura R. P. Binzel S. J. Bus T. J. McCoy K. Kondo 1 The Nature of Olivine Asteroids Meteoritics & Planetary Science 35 A35 July 2000 2000M&PSA..35R..35B . 10.1111/j.1945-5100.2000.tb01796.x free External links 113 112 Iphigenia 113 114 Kassandra 000113 Category:Discoveries by Robert Luther Category:Named minor planets 000113 000113 000113 18710312