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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 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1206565754139785 1.0306e-07  
a 5.252501743803147 1.9797e-07 au
q 4.618752871039909 6.6817e-07 au
i 16.64093723883025 8.7723e-06 deg
node 41.26768277633937 2.2488e-05 deg
peri 353.7675580362975 3.4533e-05 deg
M 311.9852641296511 3.118e-05 deg
tp 2459586.934859413219
(2022-Jan-07.43485941)
0.00039755 TDB
period 4396.911605612559
12.04
0.00024858
6.806e-07
d
yr
n .08187565097748795 4.6289e-09 deg/d
Q 5.886250616566385 2.2185e-07 au
  Orbit Determination Parameters
   # obs. used (total)      236  
   data-arc span      6717 days (18.39 yr)  
   first obs. used      2002-03-10  
   last obs. used      2020-07-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56921  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 16:02:29  

Additional Information
 Earth MOID = 3.62645 au 
 Jupiter MOID = .355902 au 
 T_jup = 2.902 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456954.5 (2014-Oct-24.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1185828975029532 1.0259e-07  
q 4.638716391999652 6.6329e-07 au
tp 2455183.001107948502
(2009-Dec-17.50110795)
0.00034692 TDB
node 41.32825501904721 2.2457e-05 deg
peri 353.5356598261698 3.5057e-05 deg
i 16.64677543583653 8.7733e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      236  
   data-arc span      6717 days (18.39 yr)  
   first obs. used      2002-03-10  
   last obs. used      2020-07-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56921  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 16:02:29  

Additional Information
 Jupiter MOID = .355902 au 
 T_jup = 2.902 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.052567638173037E-14 -6.661539159395897E-14 -2.661924463509589E-12 8.041442620357488E-15 -9.113314805796785E-13 -1.287136527040295E-14
q -6.661539159395897E-14 4.399551496463264E-13 7.197087983717315E-12 -5.51954744927467E-14 5.825814564595413E-12 9.628157352551925E-14
tp -2.661924463509589E-12 7.197087983717315E-12 1.203521242292653E-7 3.697626299731992E-12 8.924014073032783E-9 -2.013367620082174E-11
node 8.041442620357488E-15 -5.51954744927467E-14 3.697626299731992E-12 5.043117432773785E-10 -4.833017516016169E-10 -7.420910500740151E-11
peri -9.113314805796785E-13 5.825814564595413E-12 8.924014073032783E-9 -4.833017516016169E-10 1.229000591787933E-9 7.111299956558276E-11
i -1.287136527040295E-14 9.628157352551925E-14 -2.013367620082174E-11 -7.420910500740151E-11 7.111299956558276E-11 7.696993823949736E-11

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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