+ 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 2459000.5 (2020-May-31.0) TDB Reference: JPL 19 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .09762803955685684 6.0692e-08   a 5.16192806916639 1.1096e-07 au q 4.657979151440165 3.8138e-07 au i 15.28762551286764 6.7308e-06 deg node 2.862814356484574 2.0131e-05 deg peri 46.17529830856222 4.0132e-05 deg M 302.1257486110251 3.7902e-05 deg tp 2459689.151083495675 (2022-Apr-19.65108350) 0.00046077 TDB period 4283.673379931975 11.73 0.00013812 3.782e-07 d yr n .08404002081169804 2.7097e-09 deg/d Q 5.665876986892616 1.2179e-07 au   Orbit Determination Parameters    # obs. used (total)      876      data-arc span      24674 days (67.55 yr)      first obs. used      1953-01-10      last obs. used      2020-07-31      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .54554      source      ORB      producer      Otto Matic      solution date      2020-Aug-25 01:12:36   Additional Information  Earth MOID = 3.68714 au   Jupiter MOID = .00647119 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 11.3   n/a MPO296277   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 ] 2020-Oct-26 10:01 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin