15502 Hypeirochus

Jupiter trojan from the Trojan camp June 2018 yes 15502 Hypeirochus #C2FFFF LINEAR Lincoln Lab's ETS 14 July 1999 15502 Hypeirochus 1999 NV 271982 BX 141990 UP 2 Jupiter trojanTrojanbackground 23 March 2018 (JD 2458200.5) 0 36.31 yr (13,263 d) 5.2093 AU 5.0403 AU 5.1248 AU 0.0165 11.60 yr (4,238 d) 26.357° 0.0850 ms / day 16.824° 308.72° 181.57° 0.1096 AU 2.9150 50.86 2.51 km53.10 0.12 km 15.129 0.002 hlightcurve-plots-CS3 0.067 0.0070.069 0.021 C (assumed)B–V 0.766 0.047V–R 0.445 0.036V–I 0.875 0.048 9.910.010.10 15502 Hypeirochus (provisional designation 1999 NV 27) is a Jupiter trojan from the Trojan camp, approximately 53 km mi off 2 us in diameter. It was discovered on 14 July 1999, by astronomers with the Lincoln Near-Earth Asteroid Research at the Lincoln Lab's ETS near Socorro, New Mexico, in the United States. The dark Jovian asteroid has a rotation period of 15.1 hours and belongs to the 90 largest Jupiter trojans. Orbit and classification Hypeirochus is a dark Jovian asteroid in a 1:1 orbital resonance with Jupiter. It is located in the trailering Trojan camp at the Gas Giant's Lagrangian point, 60° behind its orbit (see Trojans in astronomy). It is also a non-family asteroid of the Jovian background population. It orbits the Sun at a distance of 5.0–5.2 astronomical units (AU) once every 11 years and 7 months (4,238 days; semi-major axis of 5.12 AU). Its orbit has an eccentricity of 0.02 and an inclination of 17° with respect to the ecliptic. The body's observation arc begins with its first observation as 1982 BX 14 at Palomar Observatory in January 1982, more than 16 years prior to its official discovery observation at Socorro. Numbering and naming This minor planet was numbered by the Minor Planet Center on 21 June 2000 (M.P.C. 40827). It was named in April 2025 after Hypeirochus, a son of King Priam who was killed by Odysseus. Physical characteristics Hypeirochus is an assumed carbonaceous C-type asteroid. It has a V–I color index of 0.875. Rotation period In September 2009, a first rotational lightcurve of Hypeirochus was obtained from photometric observations by Linda French at the Cerro Tololo Inter-American Observatory in Chile. Lightcurve analysis gave a rotation period of 15.03 0.03 hours with a brightness variation of 0.10 magnitude (U=2). Since then, follow-up observations by Daniel Coley and Robert Stephens at the Center for Solar System Studies during 2013–2017 gave four more refined lightcurves, with the best-rated one from January 2017 showing a rotation period of 15.129 0.002 hours and an amplitude of 0.26 magnitude (U=3).lightcurve-plots-CS3 Diameter and albedo According to the surveys carried out by the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Hypeirochus measures 50.86 and 53.10 kilometers in diameter and its surface has an albedo of 0.067 and 0.069, respectively. The Collaborative Asteroid Lightcurve Link assumes a standard albedo for a carbonaceous asteroid of 0.057 and calculates a diameter of 55.67 kilometers based on an absolute magnitude of 10.0. Notes lightcurve-plots-CS3 Lightcurve plots of (15502) 1999 NV27 from Aug 2013, Oct 2014, Dec 2015 and Jan 2017 by Daniel Coley and Robert Stephens at the Center for Solar System Studies U80 and U81. Quality code is 3/2+/3/3 (lightcurve rating at CS3). Summary figures at the LCDB and CS3. References 30em 2018-05-24 last obs. JPL Small-Body Database Browser: 15502 (1999 NV27) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2015502 Jet Propulsion Laboratory 20 June 2018 15502 (1999 NV27) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=15502 20 June 2018 List of Jupiter Trojans Minor Planet Center 1 June 2018 https://www.minorplanetcenter.net/iau/lists/JupiterTrojans.html 20 June 2018 MPC/MPO/MPS Archive Minor Planet Center https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html 20 June 2018 T. Grav A. K. Mainzer J. M. Bauer J. R. Masiero C. R. Nugent November 2012 WISE/NEOWISE Observations of the Jovian Trojan Population: Taxonomy The Astrophysical Journal 759 1 10 2012ApJ...759...49G 10.1088/0004-637X/759/1/49 1209.1549 119101711 (online catalog) Asteroid (15502) 1999 NV27 – Proper Elements AstDyS-2, Asteroids – Dynamic Site https://newton.spacedys.com/astdys/index.php?n=15502&pc=1.1.6 20 June 2018 15502 20 June 2018 6 Fumihiko Usui Daisuke Kuroda Thomas G. Müller Sunao Hasegawa Masateru Ishiguro Takafumi Ootsubo Daisuke Ishihara Hirokazu Kataza Satoshi Takita Shinki Oyabu Munetaka Ueno Hideo Matsuhara Takashi Onaka October 2011 Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey Publications of the Astronomical Society of Japan 63 5 1117–1138 2011PASJ...63.1117U 10.1093/pasj/63.5.1117 free (online, AcuA catalog p. 153) Robert D. Stephens Linda M. French Chelsea Davitt Daniel R. Coley April 2014 At the Scaean Gates: Observations Jovian Trojan Asteroids, July- December 2013 The Minor Planet Bulletin 41 2 95–100 1052-8091 2014MPBu...41...95S Robert D. Stephens Daniel R. Coley Linda M. French July 2015 Dispatches from the Trojan Camp - Jovian Trojan L5 Asteroids Observed from CS3: 2014 October - 2015 January The Minor Planet Bulletin 42 3 216–224 1052-8091 2015MPBu...42R.216S Linda M. French Robert D. Stephens Daniel R. Coley Lawrence H. Wasserman Faith Vilas Daniel La Rocca October 2013 A Troop of Trojans: Photometry of 24 Jovian Trojan Asteroids The Minor Planet Bulletin 40 4 198–203 1052-8091 2013MPBu...40..198F Robert D. Stephens Daniel R. Coley Brian D. Warner Linda M. French October 2016 Lightcurves of Jovian Trojan Asteroids from the Center for Solar System Studies: L4 Greek Camp and Spies The Minor Planet Bulletin 43 4 323–331 1052-8091 2016MPBu...43..323S Robert D. Stephens Daniel R. Coley July 2017 Lightcurve Analysis of Trojan Asteroids at the Center for Solar System Studies 2017 January - March The Minor Planet Bulletin 44 3 252–257 32455404 7243922 1052-8091 2017MPBu...44..252S O. R. Hainaut H. Boehnhardt S. Protopapa October 2012 Colours of minor bodies in the outer solar system. II. A statistical analysis revisited Astronomy and Astrophysics 546 20 2012A&A...546A.115H 10.1051/0004-6361/201219566 free 1209.1896 54776793 WGSBN Bulletin 5, #5 https://wgsbn-iau.org/files/Bulletins/V005/WGSBNBull_V005_005.pdf WGSBN Bulletin International Astronomical Union 5 5 7 April 2025 7 April 2025 External links Asteroid Lightcurve Database (LCDB), query form (info https://web.archive.org/web/20171216050541/http://www.minorplanet.info/lightcurvedatabase.html 16 December 2017 ) Discovery Circumstances: Numbered Minor Planets (15001)-(20000) – Minor Planet Center Asteroid (15502) 1999 NV27 https://web.archive.org/web/20180620024621/https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=15502 20 June 2018 at the Small Bodies Data Ferret 15502 2015502 15501 Pepawlowski 15502 015502 015502 19990714 Hypeirochus