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295340 (2008 HL12)
Classification: Jupiter Trojan          SPK-ID: 2295340
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 .02852694733780854 9.8476e-08  
a 5.271129640945757 2.0839e-07 au
q 5.120760403267735 6.4131e-07 au
i 23.30032083230998 9.9822e-06 deg
node 230.5344227746594 1.7426e-05 deg
peri 2.730239955864615 0.00013219 deg
M .6757653364084557 0.00012831 deg
tp 2458992.202497665592
(2020-May-22.70249767)
0.0015756 TDB
period 4420.322676304774
12.10
0.00026213
7.177e-07
d
yr
n .08144201823314551 4.8297e-09 deg/d
Q 5.421498878623778 2.1434e-07 au
  Orbit Determination Parameters
   # obs. used (total)      204  
   data-arc span      6767 days (18.53 yr)  
   first obs. used      2001-10-14  
   last obs. used      2020-04-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53669  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-21 18:42:02  

Additional Information
 Earth MOID = 4.1102 au 
 Jupiter MOID = .276659 au 
 T_jup = 2.835 
[ 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 12.9   n/a MPO433904  
diameter diameter 11.319 km 1.241 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2011ApJ...742...40G)  
geometric albedo albedo 0.095   0.026 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2011ApJ...742...40G)  

295340 (2008 HL12)          Discovered 2008-Apr-24 by Spacewatch at Kitt Peak
Reference: 20110912/Numbers.arcLast Updated: 2011-09-14
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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