+ 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 29 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .0572429489054599 4.0656e-08   a 5.170434321447344 7.1114e-08 au q 4.874463413765698 2.5305e-07 au i 1.776615104777737 3.7259e-06 deg node 111.8821558369947 0.00017035 deg peri 325.6077641971179 0.00017645 deg M 319.6977060968053 4.5669e-05 deg tp 2459681.246610071709 (2022-Apr-11.74661007) 0.00054532 TDB period 4294.266228158698 11.76 8.8595e-05 2.426e-07 d yr n .0838327157360156 1.7296e-09 deg/d Q 5.466405229128991 7.5185e-08 au   Orbit Determination Parameters    # obs. used (total)      1835      data-arc span      17288 days (47.33 yr)      first obs. used      1973-09-19      last obs. used      2021-01-18      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .4886      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 02:07:08   Additional Information  Earth MOID = 3.88962 au   Jupiter MOID = .0456809 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-Mar-08 12:37 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin