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312281 (2008 AR128)
Classification: Main-belt Asteroid          SPK-ID: 2312281
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 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .125860074622381 3.4377e-07  
a 2.571271866668607 5.9523e-08 au
q 2.247651397655267 9.2653e-07 au
i 8.160807050190346 1.0677e-05 deg
node 275.7885782765617 7.0518e-05 deg
peri 244.7847426491926 9.6057e-05 deg
M 336.8073080661112 9.2299e-05 deg
tp 2459097.521745244257
(2020-Sep-05.02174524)
0.00038915 TDB
period 1505.984229320818
4.12
5.2294e-05
1.432e-07
d
yr
n .239046327970085 8.3007e-09 deg/d
Q 2.894892335681946 6.7015e-08 au
  Orbit Determination Parameters
   # obs. used (total)      99  
   data-arc span      5823 days (15.94 yr)  
   first obs. used      2004-02-14  
   last obs. used      2020-01-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58558  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-25 18:45:02  

Additional Information
 Earth MOID = 1.27121 au 
 Jupiter MOID = 2.16705 au 
 T_jup = 3.404 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456676.5 (2014-Jan-19.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1257453732912129 3.4427e-07  
q 2.248078019450134 9.2742e-07 au
tp 2456087.455376917745
(2012-Jun-08.95537692)
0.000304 TDB
node 275.8627396161125 7.0505e-05 deg
peri 245.0961333169248 9.6902e-05 deg
i 8.160270418131038 1.0681e-05 deg
  Orbit Determination Parameters
   # obs. used (total)      99  
   data-arc span      5823 days (15.94 yr)  
   first obs. used      2004-02-14  
   last obs. used      2020-01-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58558  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-25 18:45:02  

Additional Information
 Jupiter MOID = 2.16705 au 
 T_jup = 3.404 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.185195289462765E-13 -3.191070927774163E-13 -9.253009890297341E-11 2.468046214885663E-12 -1.947534274206679E-11 2.776053053615325E-13
q -3.191070927774163E-13 8.601033122430664E-13 2.508902323950082E-10 -6.648300782968639E-12 5.292740525063712E-11 -7.426547230113955E-13
tp -9.253009890297341E-11 2.508902323950082E-10 9.241395496367042E-8 -2.036981446599036E-9 2.038747115163445E-8 -2.060460412259196E-10
node 2.468046214885663E-12 -6.648300782968639E-12 -2.036981446599036E-9 4.971025517551186E-9 -5.300667678656245E-9 3.748531836685196E-10
peri -1.947534274206679E-11 5.292740525063712E-11 2.038747115163445E-8 -5.300667678656245E-9 9.389953728495006E-9 -4.076903327534973E-10
i 2.776053053615325E-13 -7.426547230113955E-13 -2.060460412259196E-10 3.748531836685196E-10 -4.076903327534973E-10 1.140887557093999E-10

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 17.0   n/a MPO455301  

312281 (2008 AR128)          Discovered 2008-Jan-14 by Spacewatch at Kitt Peak
Reference: 20120109/Numbers.arcLast Updated: 2012-01-11

Alternate Designations
 2008 AR128 = 2004 CF106 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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