1840 Hus

Stony main-belt asteroid June 2026 yes 1840 Hus #D6D6D6 001840-asteroid shape model (1840) Hus.png Shape model of Hus from its lightcurve 26 October 1971 L. Kohoutek Bergedorf Obs. (1840) Hus 1971 UY1931 TS 31935 NC1953 CG Jan Hus (early Reformer) main-belt(outer)Koronis 27 April 2019 (JD 2458600.5) 0 86.72 yr (31,673 d) 2.9646 AU 2.8731 AU 2.9188 AU 0.0157 4.99 yr (1,821 d) 174.31° 0.1976 ms / day 2.4077° 40.525° 14.250° 12.446 0.193 km12.592 0.123 km 4.7483 0.0008 h 0.2554 0.02320.261 0.043 S (family-based) 11.611.7 1840 Hus (prov. designation: 1971 UY) is a stony Koronis asteroid from the outer regions of the asteroid belt, approximately 12.5 km mi off 2 us in diameter. It was discovered on 26 October 1971, by Czech astronomer Luboš Kohoutek at the Bergedorf Observatory in Hamburg, Germany. The S-type asteroid has a rotation period of 4.8 hours and is likely elongated in shape. It was later named after 15th-century theologian Jan Hus. Orbit and classification Hus is a core member of the Koronis family (605), a very large asteroid family of almost 6,000 known asteroids with nearly co-planar ecliptical orbits. It orbits the Sun in the outer main-belt at a distance of 2.9–3.0 AU once every 5 years (1,821 days; semi-major axis of 2.92 AU). Its orbit has an eccentricity of 0.02 and an inclination of 2° with respect to the ecliptic. Hus was first observed as 1931 TS 3 at the Lowell Observatory in October 1931. The body's observation arc begins with its observation as 1953 CG at the Goethe Link Observatory in January 1953, more than 18 years prior to its official discovery observation at Hamburg. Physical characteristics Based on the asteroid's membership to the Koronis family and its relatively high geometric albedo determined by the Wide-field Infrared Survey Explorer (WISE), Hus is very likely a stony S-type asteroid. Rotation period and pole In June 2006, a rotational lightcurve of Hus was obtained from photometric observations taken by Maurice Clark at the Chiro Observatory 320 in Western Australia. Lightcurve analysis gave a rotation period of 4.780 0.002 hours with a high brightness variation of 0.85 magnitude (U=2-), strongly indicative of an elongated, non-spherical shape. In March 2016, a synthetic lightcurve gave a similar period of 4.749057 0.000001 hours, using sparse-in-time photometry data from the Lowell Photometric Database (U=n.a.). More recent lightcurve analysis during observations of the 1840 Hus apparition in 2020, from the MIT Koronis Family Asteroids Rotation Lightcurve Observing Program, gave a secure rotation period of 4.7483 0.0008 hours. Diameter and albedo According to the survey carried out by NASA's WISE telescope with its subsequent NEOWISE mission, Hus measures 12.4 and 12.6 kilometers in diameter, and its surface has an albedo of 0.261 and 0.255, respectively. Conversely, the Collaborative Asteroid Lightcurve Link assumes a standard albedo for carbonaceous asteroids of 0.057, rather than one for a stony body, as indicated by WISE/NEOWISE – and calculates therefore a twice as large diameter of 25.4 kilometers, as the lower the albedo, the larger the body's diameter for a constant absolute magnitude. Naming This minor planet was named after Czech Jan Hus (1372–1415), a fifteenth century Bohemian theologian, rector of Charles University in Prague and forerunner of the Protestant Reformation. He was condemned to death by the Council of Constance and burned at the stake for his reformation ideas. Jan Hus is also known as John Huss in the English speaking world. The official 1840 naming citation was published by the Minor Planet Center on 20 December 1974 (M.P.C. 3757). References 30em 2018-06-30 last obs. JPL Small-Body Database Browser: 1840 Hus (1971 UY) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001840 Jet Propulsion Laboratory 7 December 2018 Schmadel Lutz D. Dictionary of Minor Planet Names Springer Berlin Heidelberg 147 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1841 (1840) Hus 1840 Hus (1971 UY) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1840 7 December 2018 Dictionary of Minor Planet Names – Addendum to Fifth Edition (2006–2008) Appendix – Publication Dates of the MPCs Schmadel Lutz D. Springer Berlin Heidelberg 221 978-3-642-01964-7 10.1007/978-3-642-01965-4 2009 https://cds.cern.ch/record/1339661 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 118745497 Asteroid (1840) Hus – Proper elements AstDyS-2, Asteroids – Dynamic Site https://newton.spacedys.com/astdys/index.php?n=1840&pc=1.1.6 20 October 2019 Asteroid 1840 Hus Small Bodies Data Ferret https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=1840+Hus 7 December 2018 October 2026 InternetArchiveBot 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 978-0-8165-3213-1 119280014 1840 7 December 2018 Stephen M. Slivan Claire McLellan-Cassivi Rila Shishido Nieky Wang April 2021 Rotation Period of Koronis Family Member 1840 Hus The Minor Planet Bulletin 48 2 112 2021MPBu...48..112S 6 A. K. Mainzer J. M. Bauer R. M. Cutri T. Grav E. A. Kramer J. R. Masiero C. R. Nugent S. M. Sonnett R. A. Stevenson E. L. Wright June 2016 NEOWISE Diameters and Albedos V1.0 https://sbnarchive.psi.edu/pds3/non_mission/EAR_A_COMPIL_5_NEOWISEDIAM_V1_0/data/neowise_mainbelt.tab NASA Planetary Data System EAR-A-COMPIL-5-NEOWISEDIAM-V1.0 2016PDSS..247.....M 7 December 2018 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 35447010 (catalog) Clark, Maurice July 2010 Asteroid Lightcurves from the Chiro Observatory The Minor Planet Bulletin 37 3 89–92 1052-8091 2010MPBu...37...89C J. Durech J. Hanus D. Oszkiewicz R. Vanco March 2016 Asteroid models from the Lowell photometric database Astronomy and Astrophysics 587 6 2016A&A...587A..48D 10.1051/0004-6361/201527573 1601.02909 118427201 External links A Simple Guide to NEOWISE Data Problems, Nathan Myhrvold, 25 May 2016 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 1840 1839 Ragazza 1840 1841 Masaryk 001840 Category:Discoveries by Luboš Kohoutek Category:Named minor planets 1840 Hus 19711026