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312457 (2008 QH42)
Classification: Jupiter Trojan          SPK-ID: 2312457
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09141443037057069 9.1406e-08  
a 5.291036850322587 2.3179e-07 au
q 4.807359730580648 6.3555e-07 au
i 15.84974061173645 8.0611e-06 deg
node 170.8670845682125 2.3376e-05 deg
peri 231.8440749562985 5.4414e-05 deg
M 282.757816844271 5.6811e-05 deg
tp 2459554.309504077924
(2021-Dec-05.80950408)
0.0007278 TDB
period 4445.3873186854
12.17
0.00029211
7.998e-07
d
yr
n .08098281976168953 5.3215e-09 deg/d
Q 5.774713970064524 2.5298e-07 au
  Orbit Determination Parameters
   # obs. used (total)      225  
   data-arc span      6863 days (18.79 yr)  
   first obs. used      2001-02-20  
   last obs. used      2019-12-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .61285  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 19:05:04  

Additional Information
 Earth MOID = 3.8398 au 
 Jupiter MOID = .0262515 au 
 T_jup = 2.915 
[ 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 MPO413277  
diameter diameter 14.574 km 0.761 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2011ApJ...742...40G)  
geometric albedo albedo 0.063   0.013 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2011ApJ...742...40G)  

312457 (2008 QH42)          Discovered 2008-Aug-23 by Spacewatch at Kitt Peak
Reference: 20120109/Numbers.arcLast Updated: 2012-01-11
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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