1103 Sequoia

Asteroid October 2019 yes 1103 Sequoia #D6D6D6 001103-asteroid shape model (1103) Sequoia.png Shape model of Sequoia from its lightcurve W. Baade Bergedorf Obs. 9 November 1928 (1103) Sequoia 1928 VB s ᵻ ˈ k w ɔɪ . əSequoia Sequoia National Park(national park, California) main-belt(innerHungaria 4 September 2017 (JD 2458000.5) 0 88.91 yr (32,473 days) 2.1169 AU 1.7505 AU 1.9337 AU 0.0948 2.69 yr (982 days) 66.943° 0.3665 ms / day 17.899° 267.65° 77.910° 5.21 0.42 km6.692 0.078 km7.623 0.058 km7.816 km7.82 km (taken) 3.0335 0.0003 h3.037 0.002 h3.03784 0.00001 h3.03797 hlcdb-Durech-20063.037976 0.00005 h3.037977 0.000005 h3.0381 0.0002 h3.04 0.01 h3.044 0.005 hlightcurve-plot-Warner3.049 0.001 h3.049 0.002 h 0.28130.3044 0.04390.384 0.0590.823 0.138 Tholen EESMASS XkB–V 0.731U–B 0.242 12.2512.5312.53 0.08 1103 Sequoia (s ə ˈ k w ɔɪ . ə; prov. designation: 1928 VB) is a bright Hungaria asteroid from the innermost region of the asteroid belt, approximately 7 km mi off us in diameter. It was discovered on 9 November 1928, by German astronomer Walter Baade at the Bergedorf Observatory in Hamburg, Germany, who named it after the Sequoia National Park located in California. Orbit and classification Sequoia is a bright member of the Hungaria family (003), a large family within the larger dynamical Hungaria group that forms the innermost dense concentration of asteroids in the Solar System.23 It orbits the Sun at a distance of 1.8–2.1 AU once every 2 years and 8 months (982 days; semi-major axis of 1.93 AU). Its orbit has an eccentricity of 0.09 and an inclination of 18° with respect to the ecliptic. The body's observation arc begins at the North African Algiers Observatory in December 1928, about 7 weeks after its official discovery observation at Bergedorf. Physical characteristics In the Tholen classification and based on observations by the Wide-field Infrared Survey Explorer (WISE), Sequoia is a bright E-type asteroid, which is the predominant type for members of the Hungaria family,23 while in the SMASS classification, it is a Xk-subtype that transitions between the X- and K-type asteroids. Rotation period A large number of rotational lightcurveslightcurve-plot-Warner of Sequoia have been obtained from photometric observations since 1990. Best rated lightcurve by Italian amateur astronomer Silvano Casulli from December 2006 gave a rotation period of 3.03784 hours with a brightness amplitude of 0.44 magnitude (U=3). Poles Sequoias lightcurve has also been modeled several times and gave a concurring sidereal period of 3.03797, 3.037976 and 3.037977 hours.lcdb-Durech-2006 In 2016, the large collaboration of astronomers also published a spin axis of (60.0°, −59.0°) in ecliptic coordinates (λ, β). Diameter and albedo According to the surveys carried out by the Japanese Akari satellite and the NEOWISE mission of NASA's WISE telescope, Sequoia measures between 5.21 and 7.816 kilometers in diameter and its surface has an albedo between 0.2813 and 0.823. The Collaborative Asteroid Lightcurve Link adopts Petr Pravec's revised WISE results, that is, an albedo of 0.2813 and a diameter of 7.82 kilometers based on an absolute magnitude of 12.53. Naming This minor planet was named after the Sequoia National Park located in California, United States, where the discoverer spent his vacations. The park is famous for its giant sequoia trees. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H n.a.). Notes lcdb-Durech-2006 Durech (2006).(1103) Sequoia: sidereal rotation period of 3.037975 hours (Quality code of 2). Two spin axes at (82.0, -75.0) and (209.0, -76.0) in ecliptic coordinates. Summary figures at the LCDB lightcurve-plot-Warner Lightcurve plot of 1103 Sequoia, Palmer Divide Observatory, B. D. Warner (2011). Summary figures at the LCDB References 30em 2017-11-26 last obs. JPL Small-Body Database Browser: 1103 Sequoia (1928 VB) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001103 Jet Propulsion Laboratory 10 January 2018 Dictionary of Minor Planet Names Schmadel Lutz D. Springer Berlin Heidelberg (1103) Sequoia 94 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1104 1103 Sequoia (1928 VB) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1103 10 January 2018 Asteroids and comets rotation curves Behrend Raoul Geneva Observatory http://obswww.unige.ch/~behrend/page3cou.html#001103 10 January 2018 3 December 2002 https://web.archive.org/web/20021203214643/http://obswww.unige.ch/~behrend/page3cou.html#001103 dead 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 The Astrophysical Journal 791 2 11 2014ApJ...791..121M 10.1088/0004-637X/791/2/121 1406.6645 Asteroid 1103 Sequoia – Nesvorny HCM Asteroid Families V3.0 Small Bodies Data Ferret https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=1103+Sequoia#Asteroid%201103%20SequoiaEAR-A-VARGBDET-5-NESVORNYFAM-V3.0 26 October 2019 https://web.archive.org/web/20201004033919/https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=1103+Sequoia#Asteroid%201103%20SequoiaEAR-A-VARGBDET-5-NESVORNYFAM-V3.0 4 October 2020 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 1103 10 January 2018 Petr Pravec Alan W. 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Bernasconi L. Casulli S. Behrend R. Polishook D. Henych T. Lehký M. Yoshida F. Ito T. June 2011 A study of asteroid pole-latitude distribution based on an extended set of shape models derived by the lightcurve inversion method Astronomy and Astrophysics 530 A134 2011A&A...530A.134H 0004-6361 10.1051/0004-6361/201116738 1104.4114 External links Lightcurve Database Query (LCDB), at www.minorplanet.info 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 – Geneva Observatory, Raoul Behrend Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center 1103 1102 Pepita 1103 1104 Syringa 001103 Category:Discoveries by Walter Baade Category:Named minor planets 001103 001103 19281109