(374158) 2004 UL

Sub-kilometer asteroid October 2019 yes (374158) 2004 UL #FFC2E0 18 October 2004 LINEAR Lincoln Lab's ETS (374158) 2004 UL Apollo NEO PHA Mercury crosser Venus crosser Earth crosser Mars crosser 4 September 2017 (JD 2458000.5) 0 15.05 yr (5,498 days) 2.4400 AU 0.0928 AU 1.2664 AU 0.9267 1.43 yr (521 days) 320.92° 0.6916 ms / day 23.785° 39.575° 149.57° 0.0182 AU (7.1 LD) 0.5–1.2 km (generic) 0.516 km (calculated) 38 2 hLightcurve-plot 0.20 (assumed) S 0.820 0.100lcdb-Jewitt-2013 0.540 0.100lcdb-Jewitt-2013 18.77 (R)lcdb-Jewitt-2013 18.8 (374158) 2004 UL is a sub-kilometer asteroid on an outstandingly eccentric orbit, classified as a near-Earth object and potentially hazardous asteroid of the Apollo group. The object is known for having the second-smallest perihelion of any known asteroid, after (137924) 2000 BD 19.August 2016 It was discovered on 18 October 2004 by the Lincoln Near-Earth Asteroid Research (LINEAR) at Lincoln Lab's ETS near Socorro, New Mexico. Orbit and classification This Apollo asteroid orbits the Sun at a distance of 0.09–2.44 AU once every 17 months (521 days; semi-major axis of 1.27 AU). Its orbit has an outstandingly high eccentricity of 0.93 and an inclination of 24° with respect to the ecliptic. Due to its orbit, it is also a Mercury-crosser, Venus-crosser and Mars-crosser. It has an Earth minimum orbital intersection distance of 0.0182 AU km off on 3, which translates into 7.1 lunar distances. Physical characteristics 2004 UL is an assumed stony S-type asteroid. In October 2014, a rotational lightcurve for this asteroid was obtained from photometric observations by American astronomer Brian Warner at the CS3–Palmer Divide Station (U82) in Landers, California.Lightcurve-plot It gave a longer-than average rotation period of 38 2 hours (most minor planets take 2–20 hours to complete a full rotation) with a high brightness variation of 1.2 magnitude, indicating a non-spheroidal shape (U=2). Based on a generic magnitude-to-diameter conversion, 2004 UL measures between 0.5 and 1.2 kilometers. The Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 0.516 kilometers with an absolute magnitude of 18.8. Numbering and naming This minor planet was numbered by the Minor Planet Center on 18 October 2013 (M.P.C. 85347). As of 2018, it has not been named. Notes lcdb-Jewitt-2013 Jewitt (2013). Abs. magnitude of 18.77 (R). Summary figures at Collaborative Asteroid Lightcurve Link (CALL) for (374158) Lightcurve-plot Lightcurve plot for (374158) by B. D. Warner at the CS3-Palmer Divide Station from October/November 2014 References 30em 2016-10-07 last obs. JPL Small-Body Database Browser: 374158 (2004 UL) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2374158;cad=1 Jet Propulsion Laboratory 1 June 2017 374158 (2004 UL) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=374158 18 August 2016 MPC/MPO/MPS Archive Minor Planet Center https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html 26 February 2018 NEODyS (374158) 2004UL Near Earth Objects Dynamic Site https://newton.spacedys.com/neodys2/index.php?pc=1.1.9&n=374158 2014-03-07 374158 18 August 2016 Warner, Brian D. April 2015 Near-Earth Asteroid Lightcurve Analysis at CS3-Palmer Divide Station: 2014 October–December http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015MPBu...42..115W The Minor Planet Bulletin 42 2 115–127 1052-8091 2015MPBu...42..115W 18 August 2016 External links Asteroid Lightcurve Database (LCDB), query form (info https://web.archive.org/web/20171216050541/http://www.minorplanet.info/lightcurvedatabase.html 16 December 2017 ) 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 374158 374158 2004UL 374158 374158 374158 374158 374158 374158 20041018