1647 Menelaus

Trojan asteroid June 2018 yes 1647 Menelaus #C2FFFF S. B. Nicholson Palomar Obs. 23 June 1957 (1647) Menelaus 1957 MK Menelaian Menelaus(Greek mythology) m ɛ n ə ˈ l eɪ ə sNoah Webster (1884) A Practical Dictionary of the English Language Jupiter trojanGreekbackground 23 March 2018 (JD 2458200.5) 0 65.57 yr (23,949 d) 5.3255 AU 5.1006 AU 5.2130 AU 0.0216 11.90 yr (4,347 d) 101.16° 0.0828 ms / day 5.6507° 240.32° 298.95° 0.1563 AU 2.9900 42.72 0.517 km 17.74 0.01 h 0.056 0.009 C (assumed)V–R 0.428 0.043V–I 0.866 0.043 10.5 1647 Menelaus m ɛ n ə ˈ l eɪ ə s is a mid-sized Jupiter trojan from the Greek camp, approximately 42 km mi off 2 us in diameter. It was discovered on 23 June 1957 by American astronomer Seth Nicholson at the Palomar Observatory in California and later named after the Spartan King Menelaus from Greek mythology. The dark asteroid has a rotation period of 17.7 hours. It is the principal body of the proposed Menelaus cluster, which encompasses several, mostly tentative Jovian asteroid families. Orbit and classification Menelaus is a dark Jovian asteroid in a 1:1 orbital resonance with Jupiter. It is located in the leading Greek camp at the Gas Giant's Lagrangian point, 60° ahead of its orbit (see Trojans in astronomy). Since the discovery of the first Jupiter trojan, 588 Achilles, by astronomer Max Wolf in 1906, more than 7000 Jovian asteroids have already been discovered. It orbits the Sun at a distance of 5.1–5.3 AU once every 11 years and 11 months (4,347 days; semi-major axis of 5.21 AU). Its orbit has an eccentricity of 0.02 and an inclination of 6° concerning the ecliptic. Menelaus was first imaged at Palomar in November 1951. This precovery extends the body's observation arc by more than 5 years before its official discovery observation. Menelaus cluster In 1993, Andrea Milani suggested that Menelaus might be the parent body of an asteroid family based on a modified HCM-analysis.78 The finding was also mentioned by David C. Jewitt in 2004,12 who noted that the Menelaus family is the largest proposed dynamic family to exist among the Jupiter trojans, despite having only eight members.Milani-trojan-family In 2008, Fernando Roig and Ricardo Gil-Hutton described this particular aggregation of Jupiter trojans as the "Menelaus clan," which, similar to the Flora family in the inner asteroid belt, is composed of several families (or subfamilies).9 In this publication, the Menelaus clan encompasses a dozen clusters if the separation criteria used in the HCM analysis are sufficiently relaxed. The principal bodies of these proposed family-like clusters include: 1647 Menelaus, 3548 Eurybates, 1749 Telamon, 12973 Melanthios, 13062 Podarkes, 5436 Eumelos, 2148 Epeios, 4007 Euryalos, 4138 Kalchas, 3063 Makhaon and others.10 Except for the Eurybates family, which was studied in more detail by Jakub Rozehnal and Miroslav Brož in 2011 (also see 3548 Eurybates Eurybates family), all other proposed families with their principal bodies in the Menelaus clan, including Menelaus itself, are tentative and not listed neither on the Asteroids—Dynamic Site (Milani and Knežević) nor included in the robust HCM-analysis by Nesvorný (also see Asteroid family All families).23 Instead, these bodies are considered non-family asteroids of the Jovian background population. Naming This minor planet was named after the Greek mythological figure, Menelaus, husband of Helen of Troy, brother of Agamemnon, and king and leader of the Spartan contingent of the Greek army during the Trojan War. The discoverer followed the convention to name bodies located in the camp to the east of Jupiter after famous Greek heroes. The Dictionary of Minor Planet Names also mentions that the lunar crater Menelaus was named after the Greek hero. However, based on the official International Astronomical Union–WGPSN nomenclature, it is named after Greek geometer and astronomer Menelaus of Alexandria (70–140). The official 1647 naming citation was published by the Minor Planet Center in June 1960 (M.P.C. 2019). Physical characteristics Menelaus is an assumed C-type, while most larger Jupiter trojans are D-type asteroids. It has a V–I color index of 0.866. Rotation period The Palomar Transient Factory in California obtained a rotational light curve of Menelaus from photometric observation in the R-band in October 2010. It gave a rotation period of 17.7390 hours with a brightness variation of 0.32 magnitude in the R-band (U=2). In February 2014, a refined period of 17.74 0.01 hours with an amplitude of 0.15 magnitude was determined by American astronomer Robert D. Stephens at the Center for Solar System Studies (U=3-).lightcurve-plots-CS3 Diameter and albedo According to the survey by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Menelaus measures 42.72 kilometers in diameter, and its surface has an albedo of 0.056. The Collaborative Asteroid Lightcurve Link assumes a standard albedo for carbonaceous asteroids of 0.057 and calculates a diameter of 44.22 kilometers using an absolute magnitude of 10.5. Notes 30em lightcurve-plots-CS3 Lightcurve plots of (1647) Menelaus from Jan–Feb 2014 by Robert Stephens at the Center for Solar System Studies U81. Quality code is 3- (lightcurve rating at CS3). Summary figures at the LCDB and CS3. Milani-trojan-family Members of the Menelaus cluster identified by Milani in 1993 are 1749 Telamon, 3548 Eurybates, (6053) 1993 BW 3, 6076 Plavec, (6002) 1988 RO, 6051 Anaximenes and 6006 Anaximandros, some of which are main-belt or Amor asteroids (Milani 1993, p. 94). Besides the Menelaus family, Milani found four other potential families in the Greek camp, clustered around the Jovian asteroids 1437 Diomedes, 2456 Palamedes, 2797 Teucer and (4035) 1986 WD, as well as the asteroid pair 1583 Antilochus—3801 Thrasymedes. References 30em 2017-06-03 last obs. JPL Small-Body Database Browser: 1647 Menelaus (1957 MK) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001647 Jet Propulsion Laboratory 22 June 2018 Dictionary of Minor Planet Names (1647) Menelaus Schmadel Lutz D. Springer Berlin Heidelberg 131 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1648 1647 Menelaus (1957 MK) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1647 22 June 2018 List of Jupiter Trojans Minor Planet Center V. Carruba 1 June 2018 https://www.minorplanetcenter.net/iau/lists/JupiterTrojans.html 22 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 Gazetteer of Planetary Nomenclature – Planetary Names: Crater, craters: Menelaus on Moon International Astronomical Union (IAU) Working Group for Planetary System Nomenclature (WGPSN) https://planetarynames.wr.usgs.gov/Feature/3840 27 December 2016 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 22 June 2018 (Grav (2012) Grav (2011)) Milani, Andrea October 1993 The Trojan asteroid belt: Proper elements, stability, chaos and families http://articles.adsabs.harvard.edu/cgi-bin/nph-iarticle_query?1993CeMDA..57...59M&data_type=PDF_HIGH Celestial Mechanics and Dynamical Astronomy 57 1–2 59–94 0923-2958 1993CeMDA..57...59M 10.1007/BF00692462 189850747 13 April 2017 Jewitt David C. Sheppard Scott Porco Carolyn C. Jupiter's Outer Satellites and Trojans – 12.4.2 Families Jupiter: The planet, Satellites and Magnetosphere 12 2004 Cambridge University Press Bagenal, Fran Dowling, Timothy E. McKinnon, William B. http://www.dtm.ciw.edu/users/sheppard/pub/Sheppard04JupChapter.pdf 13 April 2017 16 July 2010 https://web.archive.org/web/20100716005747/http://www.dtm.ciw.edu/users/sheppard/pub/Sheppard04JupChapter.pdf dead F. Roig A. O. Ribeiro R. Gil-Hutton June 2008 Taxonomy of asteroid families among the Jupiter Trojans: comparison between spectroscopic data and the Sloan Digital Sky Survey colors Astronomy and Astrophysics 483 3 911–931 2008A&A...483..911R 10.1051/0004-6361:20079177 free 0712.0046 118361725 D. Nesvorný M. Broz V. Carruba December 2014 Identification and Dynamical Properties of Asteroid Families Asteroids IV 297–321 2015aste.book..297N 10.2458/azu_uapress_9780816532131-ch016 1502.01628 9780816532131 119280014 Asteroid (1647) Menelaus – Proper Elements AstDyS-2, Asteroids – Dynamic Site https://newton.spacedys.com/astdys/index.php?n=1647&pc=1.1.6 22 June 2018 1647 27 December 2016 Robert D. Stephens Daniel R. Coley Brian D. Warner Linda, M. French October 2016 Lightcurves of Jovian Trojan Asteroids from the Center for Solar System Studies: L4 Greek Camp and Spies http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2016MPBu...43..323S The Minor Planet Bulletin 43 4 323–331 1052-8091 2016MPBu...43..323S 22 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 O. R. Hainaut H. Boehnhardt S. Protopapa October 2012 Colours of minor bodies in the outer solar system. II. A statistical analysis revisited Astronomy and Astrophysics 546 20 2012A&A...546A.115H 10.1051/0004-6361/201219566 free 1209.1896 54776793 External links Center for Solar System Studies, homepage 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 Asteroid 1647 Menelaus https://web.archive.org/web/20180622140335/https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=1647%20Menelaus 22 June 2018 at the Small Bodies Data Ferret 1647 1646 Rosseland 1647 1648 Shajna 001647 Category:Discoveries by Seth Nicholson Category:Named minor planets 19570623