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129878 (1999 SQ2)
Classification: Main-belt Asteroid          SPK-ID: 2129878
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1805403181289007 5.5721e-08  
a 2.622470997610915 1.5145e-08 au
q 2.149009249418425 1.5034e-07 au
i 14.24456016600168 6.3821e-06 deg
node 28.47373109611353 1.8767e-05 deg
peri 2.701196940509917 2.3264e-05 deg
M 294.7255292476451 1.4569e-05 deg
tp 2459281.758286282555
(2021-Mar-08.25828628)
6.4004e-05 TDB
period 1551.188112207971
4.25
1.3438e-05
3.679e-08
d
yr
n .2320801694950934 2.0104e-09 deg/d
Q 3.095932745803405 1.7879e-08 au
  Orbit Determination Parameters
   # obs. used (total)      648  
   data-arc span      7699 days (21.08 yr)  
   first obs. used      1999-09-13  
   last obs. used      2020-10-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5532  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 16:45:39  

Additional Information
 Earth MOID = 1.15465 au 
 Jupiter MOID = 2.35566 au 
 T_jup = 3.338 
[ 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 MPO436629  

129878 (1999 SQ2)          Discovered 1999-Sep-21 by Klet at Klet
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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