+ 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 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 31 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .05759675480342186 4.0653e-08   a 5.17237778428616 7.0969e-08 au q 4.874465609293964 2.5302e-07 au i 1.776626438310131 3.7093e-06 deg node 111.8808400764477 0.00017005 deg peri 325.5033626661246 0.00017606 deg M 336.2424747080444 4.5272e-05 deg tp 2459680.051848579846 (2022-Apr-10.55184858) 0.00054066 TDB period 4296.687648831374 11.76 8.8431e-05 2.421e-07 d yr n .08378547137302707 1.7244e-09 deg/d Q 5.470289959278357 7.5057e-08 au   Orbit Determination Parameters    # obs. used (total)      1937      data-arc span      17335 days (47.46 yr)      first obs. used      1973-09-19      last obs. used      2021-03-06      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .47688      source      ORB      producer      Otto Matic      solution date      2021-Jul-09 09:59:17   Additional Information  Earth MOID = 3.88991 au   Jupiter MOID = .0457551 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 11.28   n/a E2021B10   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 ] 2021-Jul-29 21:35 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin