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101220 (1998 ST57)
Classification: Main-belt Asteroid          SPK-ID: 2101220
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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.


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1867291480855146 3.5576e-08  
a 2.476967584233329 1.3393e-08 au
q 2.014445537394004 8.7673e-08 au
i 2.233893704363215 4.3483e-06 deg
node 100.4715118816694 0.00010446 deg
peri 212.2336233013158 0.00010602 deg
M 236.4587923943456 2.2988e-05 deg
tp 2459489.139142131412
(2021-Oct-01.63914213)		 9.3464e-05 TDB
period 1423.898103123747
3.90		 1.1548e-05
3.162e-08		 d
yr
n .2528270802596281 2.0505e-09 deg/d
Q 2.939489631072653 1.5893e-08 au
   Orbit Determination Parameters
   # obs. used (total)      714  
   data-arc span      9868 days (27.02 yr)  
   first obs. used      1993-03-19  
   last obs. used      2020-03-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56358  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 20:01:46  

Additional Information
 Earth MOID = 1.00073 au 
 Jupiter MOID = 2.33533 au 
 T_jup = 3.455 
[ 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 15.9   n/a MPO412743  

101220 (1998 ST57)          Discovered 1998-Sep-17 by LONEOS at Anderson Mesa
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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