(172034) 2001 WR1

Near-Earth asteroid September 2021 yes (172034) 2001 WR 1 #FFC2E0 LINEAR Lincoln Lab's ETS 17 November 2001 (172034) 2001 WR 1 NEOAmor 1 July 2021 (JD 2459396.5) 0 68.26 yr (24,933 d) 1.5359 AU 1.0185 AU 1.2772 AU 0.2025 1.44 yr (527 d) 200.68° 0.6828 ms / day 25.030° 6.5141° 48.551° 0.0752 AU (29.3 LD) 0.631 0.018 km 0.66 0.17 km 8.0475 0.0003 hlightcurveplot-Warner 0.34 S 17.76 (172034) 2001 WR 1 is a sub-kilometer near-Earth object of the Amor group, approximately 650 m ft off 2 us in diameter. The S-type asteroid has been identified as a potential flyby target of the Hayabusa2 mission. It was discovered on 17 November 2001, by astronomers with the Lincoln Near-Earth Asteroid Research at the Lincoln Laboratory's Experimental Test Site near Socorro, New Mexico, in the United States. The asteroid has a rotation period of 8.0 hours and possibly an elongated shape. It remains unnamed since its numbering in December 2007. Numbering and naming This minor planet was numbered by the Minor Planet Center on 24 December 2007 (M.P.C. 61443). 2021, it has not been named. Orbit and classification 270px|thumb|left|Animated orbital diagram for 2001 WR 1 from 1 January 2020 to 31 December 2023magenta 2001 WR 1RoyalBlue EarthDarkRed Mars Yellow Sun 2001 WR 1 is an Amor asteroid – a subgroup of near-Earth asteroids that approach the orbit of Earth from beyond, but do not cross it. The object orbits the Sun at an average distance – its semi-major axis – of 1.28 astronomical units (AU). Throughout its 1.44 year (527 d) orbit, its distance from the Sun varies from 1.02 AU at perihelion to 1.54 AU at aphelion. Its orbit has an eccentricity of 0.20 and an inclination of 25° with respect to the ecliptic plane. Its observation arc begins with its first observation in February 1953, more than 48 years prior to its official discovery observation at Socorro. The precovery was taken at Palomar Observatory and published by the Digitized Sky Survey. Close encounters 2001 WR 1 has an Earth minimum orbital intersection distance of 0.0747 AU km on off 3 which corresponds to 29.1 lunar distances. In September 1926, it approached Earth to 0.1496 AU km on off 3, its closest approach of all close encounters since 1900. Only in September 2199, it will approach Earth at a similar distance of 0.1514 AU km on off 3. Physical characteristics 2001 WR 1 has been characterized as a common, stony S-type asteroid. Rotation period In March 2018, a rotational lightcurve of 2001 WR 1 was obtained from photometric observations by Brian Warner at the Palmer Divide Station U82 in California. Analysis of its lightcurve gave a rotation period of 8.0475 0.0003 hours with a brightness amplitude of 0.95 magnitude (U=3), indicative of a non-spherical shape.lightcurveplot-Warner Diameter and albedo According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, 2001 WR 1 has an albedo of 0.34 and measures 0.63 and 0.66 kilometers in diameter, respectively. The Collaborative Asteroid Lightcurve Link assumes a standard albedo for a stony asteroid of 0.20 and calculates a diameter of 0.818 kilometers based on an absolute magnitude of 17.8. Exploration 2001 WR 1 was proposed as a target of the Hayabusa2 extended mission for a flyby planned to occur on 27 June 2023. When the spacecraft returned to Earth and delivered the sample capsule in December 2020, it was expected to retain 30 kg of xenon propellant, which can be used to extend its service and flyby new targets to explore. However, this asteroid was not selected as a target for Hayabusa2; two other asteroids were selected instead. Notes lightcurveplot-Warner Lightcurve plot of (172034) 2001 WR1 from Feb/Mar 2018 by Brian D. Warner at the Palmer Divide Observatory U82. Rotation period 8.0475 0.0003 hours with a brightness amplitude of 0.95 0.03 mag. Quality code is 3. Summary figures at the CS3 and LCDB websites. References 30em 2021-05-21 last obs. JPL Small-Body Database Browser: 172034 (2001 WR1) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2172034;cad=1 Jet Propulsion Laboratory 8 September 2021 172034 (2001 WR1) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=172034 8 September 2021 MPC/MPO/MPS Archive Minor Planet Center https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html 22 September 2018 Asteroid (172034) 2001 WR1 Small Bodies Data Ferret https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=172034 22 September 2018 Bruno Victorino Sarli Yuichi Tsuda September 2017 Hayabusa 2 extension plan: Asteroid selection and trajectory design Acta Astronautica 138 225–232 2017AcAau.138..225S 10.1016/j.actaastro.2017.05.016 172034 8 September 2021 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_neos.tab NASA Planetary Data System EAR-A-COMPIL-5-NEOWISEDIAM-V1.0 2016PDSS..247.....M 22 September 2018 6 C. R. Nugent A. Mainzer J. Masiero J. Bauer R. M. Cutri T. Grav E. Kramer S. Sonnett R. Stevenson E. L. Wright December 2015 NEOWISE Reactivation Mission Year One: Preliminary Asteroid Diameters and Albedos The Astrophysical Journal 814 2 13 2015ApJ...814..117N 10.1088/0004-637X/814/2/117 1509.02522 9341381 6 C. R. Nugent A. Mainzer J. Bauer R. M. Cutri E. A. Kramer T. Grav J. Masiero S. Sonnett E. L. Wright September 2016 NEOWISE Reactivation Mission Year Two: Asteroid Diameters and Albedos The Astronomical Journal 152 3 12 2016AJ....152...63N 10.3847/0004-6256/152/3/63 1606.08923 119289027 free Warner, Brian D. July 2018 Near-Earth Asteroid Lightcurve Analysis at CS3-Palmer Divide Station: 2018 January–April Minor Planet Bulletin http://www.minorplanet.info/MPB/issues/MPB_45-3.pdf 45 3 248–256 1052-8091 2018MPBu...45..248W 8 September 2021 13 April 2019 https://web.archive.org/web/20190413235907/http://www.minorplanet.info/MPB/issues/MPB_45-3.pdf dead B. Carry E. Solano S. Eggl F. E. DeMeo April 2016 Spectral properties of near-Earth and Mars-crossing asteroids using Sloan photometry Icarus 268 340–354 2016Icar..268..340C 10.1016/j.icarus.2015.12.047 1601.02087 119258489 External links List Of Amor Minor Planets (by designation), Minor Planet Center Asteroid Lightcurve Database (LCDB), query form (simple version) 172034 172034 2001WR1 2172034 172034 172034 172034 20011117