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442364 (2011 SD250)
Classification: Main-belt Asteroid          SPK-ID: 2442364
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 .2514445306759464 1.3424e-07  
a 2.57955587890961 4.4625e-08 au
q 1.930940661584805 3.758e-07 au
i 3.44954902292156 8.5993e-06 deg
node 271.3646874609847 0.00018906 deg
peri 132.2716176117616 0.00019893 deg
M 8.434224922984818 7.1067e-05 deg
tp 2458965.046549043254
(2020-Apr-25.54654904)
0.00029788 TDB
period 1513.267960123544
4.14
3.9268e-05
1.075e-07
d
yr
n .2378957392123794 6.1732e-09 deg/d
Q 3.228171096234416 5.5846e-08 au
  Orbit Determination Parameters
   # obs. used (total)      81  
   data-arc span      8634 days (23.64 yr)  
   first obs. used      1996-01-13  
   last obs. used      2019-09-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59528  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 07:43:04  

Additional Information
 Earth MOID = .942078 au 
 Jupiter MOID = 2.19246 au 
 T_jup = 3.378 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457405.5 (2016-Jan-18.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2517661104053193 1.3934e-07  
q 1.930292330909417 3.924e-07 au
tp 2457446.279623961588
(2016-Feb-27.77962396)
0.00025844 TDB
node 271.6785583981344 0.00019019 deg
peri 131.1221054296114 0.00019986 deg
i 3.435223085950834 8.5893e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      81  
   data-arc span      8634 days (23.64 yr)  
   first obs. used      1996-01-13  
   last obs. used      2019-09-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59528  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 07:43:04  

Additional Information
 Jupiter MOID = 2.19246 au 
 T_jup = 3.378 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.94153767978489E-14 -5.462265369586562E-14 -3.001957002447433E-11 -4.475956581595106E-13 -6.477349847178751E-12 -1.146213736805784E-13
q -5.462265369586562E-14 1.53973979253726E-13 8.629718751725625E-11 1.279271849424383E-12 1.873027275734948E-11 3.28224595540698E-13
tp -3.001957002447433E-11 8.629718751725625E-11 6.678935265792974E-8 7.231549025750634E-10 1.593885519858213E-8 2.294807380765103E-10
node -4.475956581595106E-13 1.279271849424383E-12 7.231549025750634E-10 3.617069668115523E-8 -3.594081278328554E-8 1.175038463980768E-9
peri -6.477349847178751E-12 1.873027275734948E-11 1.593885519858213E-8 -3.594081278328554E-8 3.994558525103958E-8 -1.116986167980364E-9
i -1.146213736805784E-13 3.28224595540698E-13 2.294807380765103E-10 1.175038463980768E-9 -1.116986167980364E-9 7.377668522968073E-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 18.0   n/a MPO495192  

442364 (2011 SD250)          Discovered 1996-Jan-13 by Spacewatch at Kitt Peak
Reference: Last Updated: 2015-09-02

Alternate Designations
 2011 SD250 = 2007 TR211 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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