1870 Glaukos

Dark Jupiter trojan asteroid June 2018 yes 1870 Glaukos #C2FFFF 24 March 1971 C. J. van HoutenI. van Houten-G.T. Gehrels Palomar Obs. (1870) Glaukos 1971 FE1976 SM Glaukian ˈ ɡ l ɔː k ə s'Glaucus' in Noah Webster (1884) A Practical Dictionary of the English Language Glaucus(Greek mythology) Jupiter trojanTrojanbackground 23 March 2018 (JD 2458200.5) 0 62.50 yr (22,827 d) 5.4155 AU 5.0765 AU 5.2460 AU 0.0323 12.02 yr (4,389 d) 215.92° 0.0820 ms / day 6.5763° 176.30° 129.91° 0.1272 AU 2.9860 47.65 0.77 km 5.986 0.003 hlightcurve-plots-CS3 0.049 0.007 D (Pan-STARRS)D (SDSS-MOC) 10.510.6 1870 Glaukos ˈ ɡ l ɔː k ə s is a mid-sized Jupiter trojan from the Trojan camp, approximately 47 km mi off 2 us in diameter. Discovered during the first Palomar–Leiden Trojan survey in 1971, it was later named for Glaucus from Greek mythology. The dark D-type asteroid has a rotation period of 6.0 hours. Discovery Glaukos was discovered on 24 March 1971, by Dutch astronomer couple Ingrid and Cornelis van Houten at Leiden, on photographic plates taken by astronomer Tom Gehrels at the Californian Palomar Observatory in California. The body's observation arc begins with a precovery of its first recorded observation at Palomar in November 1955, or more than 15 years prior to its official discovery observation. This discovery was made in the context of a larger survey of faint Trojans. The trio of Dutch and Dutch–American astronomers also collaborated on the productive Palomar–Leiden survey in the 1960s, using the same procedure as for this (smaller) survey: Tom Gehrels used Palomar's Samuel Oschin telescope (also known as the 48-inch Schmidt Telescope), and shipped the photographic plates to Cornelis and Ingrid van Houten at Leiden Observatory where astrometry was carried out. More than 7000 Jupiter trojans have already been discovered. Orbit and classification Glaukos is a dark Jovian asteroid in a 1:1 orbital resonance with Jupiter. It is located in the trailing Trojan camp at the Gas Giant's Lagrangian point, 60° behind its orbit (see Trojans in astronomy). It is also a non-family asteroid of the Jovian background population. It orbits the Sun at a distance of 5.1–5.4 AU once every 12.02 years (4,389 days; semi-major axis of 5.25 AU). Its orbit has an eccentricity of 0.03 and an inclination of 7° with respect to the ecliptic. Physical characteristics Glaukos has been characterized as a dark D-type asteroid by PanSTARRS photometric survey as well as in the SDSS-based taxonomy. It is the most common spectral type among the Jupiter trojans. Lightcurves In 2012 and 2013, three rotational lightcurves of Glaukos in the R- and S-band were obtained by astronomers at the Palomar Transient Factory in California. Lightcurve analysis gave a rotation period of 5.979, 5.980 and 5.989 hours with an amplitude between 0.27 and 0.37 magnitude (U=2/2/2). In October 2013, photometric observations by American astronomer Robert Stephens at the Center for Solar System Studies gave the so-far best rated lightcurve, with a period of 5.986 0.003 hours and a brightness variation of 0.42 magnitude (U=3).lightcurve-plots-CS3 Diameter and albedo According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Glaukos measures 47.65 kilometers in diameter, and its surface has an albedo of 0.049, while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for a carbonaceous asteroid of 0.057 and calculates a diameter of 42.23 kilometers with an absolute magnitude of 10.6. Naming This minor planet was named after Glaucus (Glaukos) from Greek mythology. In Homer's Iliad, he was captain in the Lycian contingent during the Trojan War. and was killed by Ajax, after whom the Jovian asteroid 1404 Ajax is named. The official 1870 naming citation was published by the Minor Planet Center on 1 June 1975 (M.P.C. 3826). Notes refs lightcurve-plots-CS3 Lightcurve plots of (1870) Glaukos from Oct 2013 by Robert Stephens at the Center for Solar System Studies U80. Quality code is 3 (lightcurve rating at CS3). Summary figures at the LCDB and CS3. References 30em 2018-05-24 last obs. JPL Small-Body Database Browser: 1870 Glaukos (1971 FE) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001870 https://web.archive.org/web/20161220095134/http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001870 dead 20 December 2016 Jet Propulsion Laboratory 21 June 2018 Schmadel Lutz D. Dictionary of Minor Planet Names Springer Berlin Heidelberg 150 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1871 (1870) Glaukos 1870 Glaukos (1971 FE) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1870 21 June 2018 List of Jupiter Trojans Minor Planet Center V. Carruba 1 June 2018 https://www.minorplanetcenter.net/iau/lists/JupiterTrojans.html 21 June 2018 Dictionary of Minor Planet Names – Addendum to Fifth Edition (2006–2008) Appendix – Publication Dates of the MPCs Schmadel Lutz D. 2009 Springer Berlin Heidelberg 221 978-3-642-01964-7 10.1007/978-3-642-01965-4 2009dmpn.book.....S https://cds.cern.ch/record/1339661 T. Grav A. K. Mainzer J. M. Bauer J. R. Masiero C. R. Nugent November 2012 WISE/NEOWISE Observations of the Jovian Trojan Population: Taxonomy http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012ApJ...759...49G The Astrophysical Journal 759 1 10 2012ApJ...759...49G 10.1088/0004-637X/759/1/49 1209.1549 119101711 21 June 2018 (online catalog) Asteroid (1870) Glaukos – Proper Elements AstDyS-2, Asteroids – Dynamic Site https://newton.spacedys.com/astdys/index.php?n=1870&pc=1.1.6 20 October 2019 Asteroid 1870 Glaukos Small Bodies Data Ferret https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=1870+Glaukos 20 October 2019 7 November 2020 https://web.archive.org/web/20201107141453/https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=1870+Glaukos dead J. M. Carvano P. H. Hasselmann D. Lazzaro T. Mothé-Diniz February 2010 SDSS-based taxonomic classification and orbital distribution of main belt asteroids https://sbnarchive.psi.edu/pds3/non_mission/EAR_A_I0035_5_SDSSTAX_V1_1/data/sdsstax_ast_table.tab Astronomy and Astrophysics 510 12 2010A&A...510A..43C 10.1051/0004-6361/200913322 30 October 2019 free (PDS data set) 1870 21 June 2018 Robert D. Stephens Linda M. French Chelsea Davitt Daniel R. Coley April 2014 At the Scaean Gates: Observations Jovian Trojan Asteroids, July- December 2013 http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2014MPBu...41...95S The Minor Planet Bulletin 41 2 95–100 1052-8091 2014MPBu...41...95S 21 June 2018 6 Adam Waszczak Chan-Kao Chang Eran O. Ofek Russ Laher Frank Masci David Levitan Jason Surace Yu-Chi Cheng Wing-Huen Ip Daisuke Kinoshita George Helou Thomas A. Prince Shrinivas Kulkarni September 2015 Asteroid Light Curves from the Palomar Transient Factory Survey: Rotation Periods and Phase Functions from Sparse Photometry The Astronomical Journal 150 3 35 2015AJ....150...75W 10.1088/0004-6256/150/3/75 1504.04041 8342929 6 Peter Veres Robert Jedicke Alan Fitzsimmons Larry Denneau Mikael Granvik Bryce Bolin Serge Chastel Richard J. Wainscoat William S. Burgett Kenneth C. Chambers Heather Flewelling Nick Kaiser Eugen A. Magnier Jeff S. Morgan Paul A. Price John L. Tonry Christopher Waters November 2015 Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results Icarus 261 34–47 2015Icar..261...34V 10.1016/j.icarus.2015.08.007 1506.00762 53493339 External links Asteroid Lightcurve Database (LCDB), query form (info https://web.archive.org/web/20171216050541/http://www.minorplanet.info/lightcurvedatabase.html 16 December 2017 ) Dictionary of Minor Planet Names, Google books Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center 1870 1869 Philoctetes 1870 1871 Astyanax 001870 Category:Discoveries by Cornelis Johannes van Houten Category:Discoveries by Ingrid van Houten-Groeneveld Category:Discoveries by Tom Gehrels Category:Named minor planets 19710324