+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   17351 Pheidippos (1973 SV) Classification: Jupiter Trojan          SPK-ID: 2017351 [ 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 24 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .0978423143529865 6.0215e-08   a 5.160149244977213 1.0041e-07 au q 4.655268300441826 3.7939e-07 au i 15.29053676255183 6.6881e-06 deg node 2.861821773649738 1.4095e-05 deg peri 46.59182853959494 3.4479e-05 deg M 335.06999856077 3.2317e-05 deg tp 2459692.991074357527 (2022-Apr-23.49107436) 0.00038691 TDB period 4281.459310337153 11.72 0.00012496 3.421e-07 d yr n .08408348039903503 2.4541e-09 deg/d Q 5.6650301895126 1.1023e-07 au   Orbit Determination Parameters    # obs. used (total)      1240      data-arc span      24861 days (68.07 yr)      first obs. used      1953-01-10      last obs. used      2021-02-03      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .49307      source      ORB      producer      Otto Matic      solution date      2021-Jul-08 17:50:31   Additional Information  Earth MOID = 3.6843 au   Jupiter MOID = .0123646 au   T_jup = 2.920  [ 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 11.49   n/a E2021B10   diameter diameter 28.749 km 3.015 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)   geometric albedo albedo 0.071   0.031 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)   17351 Pheidippos           Discovered 1973 Sept. 19 by C. J. van Houten and I. van Houten-Groeneveld on Palomar Schmidt plates taken by T. Gehrels. Pheidippos was a hero from Nisyros, in the Kalydnian islands. Son of king Thessalos, brother of Antiphos and grandson of Heracles, he fought against Telephos, king of Mysia. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20010309/MPCPages.arc Last Updated: 2009-05-11 Alternate Designations  1973 SV = 1997 TH28 = 1998 VG54  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jul-31 04:04 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin