+ 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 15 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .120656570623158 1.0172e-07   a 5.252501740466974 1.8521e-07 au q 4.618752893270059 6.6737e-07 au i 16.64093337869978 7.3206e-06 deg node 41.2676817818889 2.24e-05 deg peri 353.7675587606202 3.3142e-05 deg M 311.9852647991987 2.7026e-05 deg tp 2459586.934850676885 (2022-Jan-07.43485068) 0.00034263 TDB period 4396.911601423453 12.04 0.00023256 6.367e-07 d yr n .08187565105549401 4.3305e-09 deg/d Q 5.886250587663887 2.0755e-07 au   Orbit Determination Parameters    # obs. used (total)      294      data-arc span      6799 days (18.61 yr)      first obs. used      2002-03-10      last obs. used      2020-10-20      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .54579      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 02:31:17   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. 2020-October); 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 ] 2021-Jan-21 16:23 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin