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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.arcLast Updated: 2009-12-04

Alternate Designations
 2004 JA22 = 2003 GM24 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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