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172819 (2004 JN42)
Classification: Jupiter Trojan          SPK-ID: 2172819
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 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07408853222720363 9.4829e-08  
a 5.273346418678526 1.7712e-07 au
q 4.882651922593054 6.039e-07 au
i 15.19728757708307 7.5369e-06 deg
node 212.2137866848322 2.5137e-05 deg
peri 133.6433538563493 5.2212e-05 deg
M 9.963965216032042 4.1606e-05 deg
tp 2458878.078532270048
(2020-Jan-29.57853227)
0.00051379 TDB
period 4423.11142474394
12.11
0.00022284
6.101e-07
d
yr
n .08139066946992883 4.1005e-09 deg/d
Q 5.664040914763998 1.9024e-07 au
  Orbit Determination Parameters
   # obs. used (total)      503  
   data-arc span      6841 days (18.73 yr)  
   first obs. used      2001-01-28  
   last obs. used      2019-10-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50143  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 19:43:31  

Additional Information
 Earth MOID = 3.89779 au 
 Jupiter MOID = .0353437 au 
 T_jup = 2.924 
[ 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 12.1   n/a MPO417930  
diameter diameter 18.805 km 1.170 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2011ApJ...742...40G)  
geometric albedo albedo 0.087   0.021 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2011ApJ...742...40G)  

172819 (2004 JN42)          Discovered 2004-May-15 by LINEAR at Socorro
Reference: 20071224/Numbers.arcLast Updated: 2007-12-22

Alternate Designations
 2004 JN42 = 2002 GT49 = 2003 HJ 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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