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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1868348765853089 3.5583e-08  
a 2.476602572445914 1.3332e-08 au
q 2.013886836472123 8.7695e-08 au
i 2.233906814013989 4.3483e-06 deg
node 100.4704541691047 0.00010447 deg
peri 212.277345041312 0.00010603 deg
M 286.992661256069 2.3244e-05 deg
tp 2459489.200092818296
(2021-Oct-01.70009282)
9.3421e-05 TDB
period 1423.583371243296
3.90
1.1496e-05
3.147e-08
d
yr
n .2528829763483339 2.042e-09 deg/d
Q 2.939318308419705 1.5823e-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.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .56343  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:35:47  

Additional Information
 Earth MOID = .998192 au 
 Jupiter MOID = 2.33536 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 15.94   n/a E2021B55  

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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