+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   12658 Peiraios (1973 SL) Classification: Jupiter Trojan          SPK-ID: 2012658 [ 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 24 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .05691016872238212 4.0698e-08   a 5.16843759702174 8.2283e-08 au q 4.87430094134413 2.5449e-07 au i 1.776628878738035 4.8888e-06 deg node 111.8828543678989 0.00017797 deg peri 325.8087374004384 0.0001863 deg M 302.7089400963258 5.6858e-05 deg tp 2459683.501564622977 (2022-Apr-14.00156462) 0.00068332 TDB period 4291.778921138496 11.75 0.00010249 2.806e-07 d yr n .08388130111429447 2.0031e-09 deg/d Q 5.462574252699349 8.6966e-08 au   Orbit Determination Parameters    # obs. used (total)      1445      data-arc span      17121 days (46.87 yr)      first obs. used      1973-09-19      last obs. used      2020-08-04      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .52646      source      ORB      producer      Otto Matic      solution date      2020-Aug-25 00:35:43   Additional Information  Earth MOID = 3.88992 au   Jupiter MOID = .0456205 au   T_jup = 2.996  [ 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 11.2   n/a MPO259433   diameter diameter 26.458 km 0.453 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)   geometric albedo albedo 0.084   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)   12658 Peiraios           Discovered 1973 Sept. 19 by C. J. van Houten and I. van Houten-Groeneveld on Palomar Schmidt plates taken by T. Gehrels. Peiraios, son of Klytios, was a friend of Telemachos. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20000523/MPCPages.arc Last Updated: 2013-03-29 Alternate Designations  1973 SL = 1996 TZ39 = 1998 XU79  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Oct-23 22:00 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin