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129877 (1999 SP2)
Classification: Main-belt Asteroid          SPK-ID: 2129877
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2234650372768098 7.1003e-08  
a 2.35140573501098 1.1588e-08 au
q 1.825948764783847 1.6393e-07 au
i 25.66913408861441 6.1611e-06 deg
node 345.653598002144 1.036e-05 deg
peri 359.5927730248121 1.4902e-05 deg
M 291.3980268484519 1.3744e-05 deg
tp 2459251.471203306967
(2021-Feb-05.97120331)
5.1278e-05 TDB
period 1317.01216510081
3.61
9.7355e-06
2.665e-08
d
yr
n .2733459944710868 2.0206e-09 deg/d
Q 2.876862705238113 1.4177e-08 au
  Orbit Determination Parameters
   # obs. used (total)      695  
   data-arc span      7134 days (19.53 yr)  
   first obs. used      1999-09-22  
   last obs. used      2019-04-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5103  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 06:30:23  

Additional Information
 Earth MOID = .818915 au 
 Jupiter MOID = 2.54659 au 
 T_jup = 3.394 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.4   n/a MPO229666  

129877 (1999 SP2)          Discovered 1999-Sep-22 by LINEAR at Socorro
Reference: 20060711/Numbers.arcLast Updated: 2006-07-17

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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