1338 Duponta

Stony Florian asteroid and synchronous binary system October 2019 yes 1338 Duponta #D6D6D6 1338Dup2-LB1-mag16.jpg Duponta seen at approx. 16 apmag in 2009 L. Boyer Algiers Obs. 4 December 1934 (1338) Duponta 1934 XA dj uː ' p ɒ n t ə Marc Dupont(discoverer's nephew) main-belt(inner)Flora 4 September 2017 (JD 2458000.5) 0 82.42 yr (30,104 days) 2.5179 AU 2.0108 AU 2.2644 AU 0.1120 3.41 yr (1,245 days) 102.88° 0.2893 ms / day 4.8170° 325.63° 110.63° 1 (P: 17.57; D: 1.77 km) 7.470 0.114 km7.68 0.06 (derived)7.875 0.062 km7.88 km (taken)7.885 km 3.85449 0.0003 hlightcurveplot-Pravec-20103.85453 0.00009 h3.85453 0.0003 hlightcurveplot-Pravec-2007 0.21590.2286 0.02740.251 0.040 S (assumed) 12.30 0.03 (R)12.39 0.2 (R)12.612.712.7512.798 0.064 1338 Duponta, provisional designation 1934 XA, is a stony Florian asteroid and synchronous binary system from the inner regions of the asteroid belt, approximately 7.8 kilometers in diameter. It was discovered on 4 December 1934, by French astronomer Louis Boyer at the Algiers Observatory in Algeria, North Africa. It was named after the discoverer's nephew, Marc Dupont. The asteroid's unnamed minor-planet moon was discovered in March 2007. It measures approximately 1.77 kilometers in diameter and has an orbital period of 17.57 hours. Orbit and classification Duponta is a member of the Flora family (402), a giant asteroid family and the largest family of stony asteroids in the main belt.23 It orbits the Sun in the inner main belt at a distance of 2.0–2.5 AU once every 3 years and 5 months (1,245 days). Its orbit has an eccentricity of 0.11 and an inclination of 5° with respect to the ecliptic. The body's observation arc begins with its official discovery observation at Algiers in 1934. Physical characteristics Duponta is an assumed stony S-type asteroid, which agrees with the Flora family's overall spectral type.23 Rotation period In March 2007, a rotational lightcurve of Duponta was obtained from photometric observations by a collaboration of Czech (Ondřejov Observatory), Slovak (Modra Observatory), Australian and American astronomers. Lightcurve analysis gave a well-defined rotation period of 3.85453 hours with a brightness variation of 0.23 magnitude (U=3). Follow-up observations by Petr Pravec in 2007 and 2010, gave a concurring period of 3.85449 and 3.85453 hours with an amplitude of 0.26 and 0.23 magnitude, respectively (U=3/3).lightcurveplot-Pravec-2010lightcurveplot-Pravec-2007 Moon During the photometric observations in 2007, it was also revealed that Duponta is a synchronous binary asteroid with a minor-planet moon orbiting it every 17.57(8) hours. Based on mutual eclipse and occultation events with a magnitude between 0.06 and 0.12, the binary system has a mean-diameter ratio of 0.23 0.02, which translates into a diameter of 1.77 kilometers for the satellite. It has an estimated semi-major axis of 14 kilometers. Diameter and albedo According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Duponta measures 7.470 and 7.875 kilometers in diameter and its surface has an albedo of 0.2286 and 0.251, respectively. The Collaborative Asteroid Lightcurve Link adopts Petr Pravec's revised WISE data, that is, an albedo of 0.2159 and a diameter of 7.885 kilometers based on an absolute magnitude of 12.798. Naming This minor planet was named by the discoverer after his nephew Marc Dupont. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 122). Notes lightcurveplot-Pravec-2007 Pravec (2007) lightcurve plots – short and long period for (1338) Duponta, from online data published by the Ondrejov Asteroid Photometry Project. Summary figures at the LCDB lightcurveplot-Pravec-2010 Pravec (2010) lightcurve plots – short and long period for (1338) Duponta, from online data published by the Ondrejov Asteroid Photometry Project. Summary figures at the LCDB References 30em 2017-05-06 last obs. JPL Small-Body Database Browser: 1338 Duponta (1934 XA) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001338 Jet Propulsion Laboratory 18 September 2017 Schmadel Lutz D. Dictionary of Minor Planet Names Springer Berlin Heidelberg 109 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1339 (1338) Duponta 1338 Duponta (1934 XA) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1338 18 September 2017 6 Joseph R. Masiero T. Grav A. K. Mainzer C. R. Nugent J. M. Bauer R. Stevenson S. Sonnett August 2014 Main-belt Asteroids with WISE/NEOWISE: Near-infrared Albedos http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2014ApJ...791..121M The Astrophysical Journal 791 2 11 2014ApJ...791..121M 10.1088/0004-637X/791/2/121 1406.6645 18 September 2017 Asteroid 1338 Duponta – Nesvorny HCM Asteroid Families V3.0 Small Bodies Data Ferret https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=1338+Duponta#Asteroid%201338%20DupontaEAR-A-VARGBDET-5-NESVORNYFAM-V3.0 26 October 2019 20 August 2020 https://web.archive.org/web/20200820004942/https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=1338+Duponta#Asteroid%201338%20DupontaEAR-A-VARGBDET-5-NESVORNYFAM-V3.0 dead 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 Robert Johnston (1338) Duponta johnstonsarchive.net 21 September 2014 http://www.johnstonsarchive.net/astro/astmoons/am-01338.html 18 September 2017 1338 18 September 2017 Petr Pravec Alan W. Harris Peter Kusnirák Adrián Galád Kamil Hornoch September 2012 Absolute magnitudes of asteroids and a revision of asteroid albedo estimates from WISE thermal observations http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012Icar..221..365P Icarus 221 1 365–387 2012Icar..221..365P 10.1016/j.icarus.2012.07.026 18 September 2017 6 A. Mainzer T. Grav J. Masiero E. Hand J. Bauer D. Tholen R. S. McMillan T. Spahr R. M. Cutri E. Wright J. Watkins W. Mo C. Maleszewski November 2011 NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results The Astrophysical Journal 741 2 25 2011ApJ...741...90M 10.1088/0004-637X/741/2/90 1109.6407 6 S. Gajdos L. Kornos J. Vilagi A. Galad P. Pravec R. Stephens V. Reddy R. Dyvig D. Higgins J. Oey D. Pray March 2007 (1338) Duponta http://www.cbat.eps.harvard.edu/iau/cbet/000900/CBET000910.txt Central Bureau Electronic Telegrams 910 1 2007CBET..910....1G 18 September 2017 6 P. Pravec P. Scheirich D. Vokrouhlický A. W. Harris P. Kusnirák K. Hornoch D. P. Pray D. Higgins A. Galád J. Világi S. Gajdos L. Kornos J. Oey M. Husárik W. R. Cooney J. Gross D. Terrell R. Durkee J. Pollock D. E. Reichart K. Ivarsen J. Haislip A. LaCluyze Yu. N. Krugly N. Gaftonyuk R. D. Stephens R. Dyvig V. Reddy V. Chiorny O. Vaduvescu Longa-Peñ P. a A. Tudorica B. D. Warner G. Masi J. Brinsfield Gonç R. alves P. Brown Z. Krzeminski O. Gerashchenko V. Shevchenko I. Molotov F. Marchis March 2012 Binary asteroid population. 2. Anisotropic distribution of orbit poles of small, inner main-belt binaries http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012Icar..218..125P Icarus 218 1 125–143 2012Icar..218..125P 10.1016/j.icarus.2011.11.026 18 September 2017 External links Asteroids with Satellites, Robert Johnston, johnstonsarchive.net Satellites and Companions of Minor Planets, IAU – Central Bureau for Astronomical Telegrams, July 2010 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 Asteroids and comets rotation curves, CdR https://web.archive.org/web/20160729213840/http://obswww.unige.ch/~behrend/page_cou.html 29 July 2016 – Observatoire de Genève, Raoul Behrend Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center 1338 1337 Gerarda 1338 1339 Désagneauxa 001338 Category:Discoveries by Louis Boyer (astronomer) Category:Named minor planets 001338 19341204