+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   226691 (2004 JA22) Classification: Jupiter Trojan          SPK-ID: 2226691 [ 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 13 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1206565298752375 1.1347e-07   a 5.2525017294002 3.0111e-07 au q 4.618753097567089 6.733e-07 au i 16.6409304347086 1.0019e-05 deg node 41.26766427991442 2.2513e-05 deg peri 353.7675728204573 4.5558e-05 deg M 311.9852618722121 5.8188e-05 deg tp 2459586.934884572668 (2022-Jan-07.43488457) 0.00075171 TDB period 4396.911587527326 12.04 0.00037809 1.035e-06 d yr n .0818756513142562 7.0406e-09 deg/d Q 5.886250361233312 3.3744e-07 au   Orbit Determination Parameters    # obs. used (total)      220      data-arc span      5587 days (15.30 yr)      first obs. used      2002-03-10      last obs. used      2017-06-26      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .58547      source      ORB      producer      Otto Matic      solution date      2018-Oct-04 08:46:27   Additional Information  Earth MOID = 3.62645 au   Jupiter MOID = .355902 au   T_jup = 2.902  [ 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 12.8   n/a MPO413100   diameter diameter 12.648 km 0.721 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2011ApJ...742...40G)   rotation period rot_per 19.9 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on fragmentary lightcurve(s), may be completely wrong. Published Reference List: [Stephens, R.D. (2016) http://www.planetarysciences.org/PHP/CS3_Lightcurves.php] geometric albedo albedo 0.084   0.017 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2011ApJ...742...40G)   226691 (2004 JA22)          Discovered 2004-May-09 by Spacewatch at Kitt Peak Reference: 20091202/Numbers.arc Last Updated: 2009-12-04 Alternate Designations  2004 JA22 = 2003 GM24  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Aug-05 08:46 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin