10830 Desforges

Main-belt asteroid May 2018 yes 10830 Desforges #D6D6D6 E. W. Elst La Silla Obs. 20 October 1993 (10830) Desforges 1993 UT 61982 FS 21984 SS 7 Jacques Desforges(French priest) main-belt(middle)backgroundEunomia 23 March 2018 (JD 2458200.5) 0 35.27 yr (12,884 d) 3.1271 AU 2.1944 AU 2.6607 AU 0.1753 4.34 yr (1,585 d) 151.24° 0.2271 ms / day 11.153° 178.72° 307.82° 4.21 km (calculated)7.692 2.245 km9.390 0.203 km 8.804 0.0058 h 0.0635 0.05450.0797 0.01010.080 0.0100.21 (assumed) S (assumed) 13.513.613.739 0.008 (R)14.1814.19 10830 Desforges, provisional designation 1993 UT 6, is a background or Eunomian asteroid from the central regions of the asteroid belt, approximately 7 km mi off 1 us in diameter. It was discovered on 20 October 1993, by Belgian astronomer Eric Elst at the La Silla Observatory in northern Chile. The likely elongated S-type asteroid has a rotation period of 8.8 hours. It was named after French priest and aviation visionary Jacques Desforges. Orbit and classification Desforges is a non-family asteroid of the main belt's background population when applying the hierarchical clustering method to its proper orbital elements. Based on osculating Keplerian orbital elements, the asteroid has also been classified as a member of the Eunomia family (502), a prominent family of stony S-type asteroid and the largest one in the intermediate main belt with more than 5,000 members. It orbits the Sun in the central main-belt at a distance of 2.2–3.1 AU once every 4 years and 4 months (1,585 days; semi-major axis of 2.66 AU). Its orbit has an eccentricity of 0.18 and an inclination of 11° with respect to the ecliptic. The body's observation arc begins with its first observations as 1982 FS 2 at Klet Observatory in March 1982, more than 11 years prior to its official discovery observation at La Silla. Physical characteristics Desforges is an assumed stony S-type asteroid, which is the overall spectral type for members of the Eunomia family.23 Observations with the Wide-field Infrared Survey Explorer (WISE), however, gave a low geometric albedo more typical for an X- or C-type asteroid (see below). Rotation period In August 2010, a rotational lightcurve of Desforges was obtained from photometric observations in the R-band by astronomers at the Palomar Transient Factory in California. Lightcurve analysis gave a rotation period of 8.804 hours with a high brightness amplitude of 0.69 magnitude, which indicates that the body has a non-spherical shape (U=2). Diameter and albedo According to the survey carried out by the NEOWISE mission of NASA's WISE telescope, Desforges measures between 7.692 and 9.390 kilometers in diameter and its surface has an albedo between 0.0635 and 0.080. The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.21 – derived from the Eunomia family's parent body, 15 Eunomia – and calculates a diameter of 4.21 kilometers based on an absolute magnitude of 14.19. Naming This minor planet was named after a French priest Jacques Desforges (1723–1791), who was imprisoned for eight months in 1758 in the Bastille, during which time he planned the construction of a flying machine. The official naming citation was published by the Minor Planet Center on 18 March 2003 (M.P.C. 48156). References 30em 2017-07-05 last obs. JPL Small-Body Database Browser: 10830 Desforges (1993 UT6) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2010830 Jet Propulsion Laboratory 1 May 2018 10830 Desforges (1993 UT6) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=10830 1 May 2018 MPC/MPO/MPS Archive Minor Planet Center https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html 1 May 2018 6 Joseph R. Masiero A. K. Mainzer T. Grav J. M. Bauer R. M. Cutri J. Dailey P. R. M. Eisenhardt R. S. McMillan T. B. Spahr M. F. Skrutskie D. Tholen R. G. Walker E. L. Wright E. DeBaun D. Elsbury T. IV Gautier S. Gomillion A. Wilkins November 2011 Main Belt Asteroids with WISE/NEOWISE. I. Preliminary Albedos and Diameters The Astrophysical Journal 741 2 20 2011ApJ...741...68M 10.1088/0004-637X/741/2/68 1109.4096 Asteroid 10830 Desforges – Proper Elements AstDyS-2, Asteroids – Dynamic Site https://newton.spacedys.com/astdys/index.php?pc=1.1.6&n=10830 29 October 2019 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 10830 1 May 2018 6 Joseph R. Masiero C. Nugent A. K. Mainzer E. L. Wright J. M. Bauer R. M. Cutri T. Grav E. Kramer S. Sonnett October 2017 NEOWISE Reactivation Mission Year Three: Asteroid Diameters and Albedos The Astronomical Journal 154 4 10 2017AJ....154..168M 10.3847/1538-3881/aa89ec 1708.09504 free 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 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 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 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 (10001)-(15000) – Minor Planet Center 10830 10829 Matsuobasho 10830 10831 Takamagahara 010830 Category:Discoveries by Eric Walter Elst Category:Named minor planets 19931020