+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   171433 Prothous (2007 RK35) Classification: Jupiter Trojan          SPK-ID: 2171433 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 18 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .05480966796047424 6.1405e-08   a 5.251937052164826 1.1514e-07 au q 4.96408012618636 3.5324e-07 au i 5.537659910835167 6.3212e-06 deg node 166.3503753064732 5.0122e-05 deg peri 220.6649034866939 7.0632e-05 deg M 22.72423907150762 4.6e-05 deg tp 2459118.999005435163 (2020-Sep-26.49900544) 0.00056641 TDB period 4396.202562777979 12.04 0.00014457 3.958e-07 d yr n .08188885631614627 2.693e-09 deg/d Q 5.539793978143291 1.2145e-07 au   Orbit Determination Parameters    # obs. used (total)      483      data-arc span      7235 days (19.81 yr)      first obs. used      2001-03-18      last obs. used      2021-01-07      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .52281      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 20:48:33   Additional Information  Earth MOID = 3.96969 au   Jupiter MOID = .0335915 au   T_jup = 2.988  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 12.99   n/a E2021B55   diameter diameter 12.625 km 0.810 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2011ApJ...742...40G)   geometric albedo albedo 0.077   0.016 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2011ApJ...742...40G)   171433 Prothous           Discovered 2007 Sept. 7 by J. Lacruz at La Cañada. Prothous, leader of Magnesia, son of Tenthredon, was one of the suitors of Helen. He brought 40 ships to the Trojan war and was one of the warriors who hid inside the wooden horse. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20080122/MPCPages.arc Last Updated: 2008-03-05 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jul-26 03:05 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin