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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 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 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456735.5 (2014-Mar-19.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1879367176432986 3.5764e-08  
q 2.011083824412415 8.8322e-08 au
tp 2456638.745778953623
(2013-Dec-12.24577895)
7.9321e-05 TDB
node 100.5310909739692 0.00010432 deg
peri 211.7636622577073 0.00010585 deg
i 2.234848109868901 4.3526e-06 deg
  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
 Jupiter MOID = 2.33533 au 
 T_jup = 3.455 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.279051147720429E-15 -3.134898545091647E-15 4.423488692983169E-13 -7.86804747605644E-15 6.992006639131018E-14 3.606144818215928E-16
q -3.134898545091647E-15 7.800712295955854E-15 -6.782322632549291E-13 1.60597497934147E-14 -8.044325121627534E-14 -8.801582874158112E-16
tp 4.423488692983169E-13 -6.782322632549291E-13 6.291846598646635E-9 -4.766272045427614E-11 1.436727858868024E-9 -1.362898805777524E-12
node -7.86804747605644E-15 1.60597497934147E-14 -4.766272045427614E-11 1.088345394751342E-8 -1.08853705869917E-8 -7.578540195422774E-11
peri 6.992006639131018E-14 -8.044325121627534E-14 1.436727858868024E-9 -1.08853705869917E-8 1.120391463056878E-8 7.541671232374473E-11
i 3.606144818215928E-16 -8.801582874158112E-16 -1.362898805777524E-12 -7.578540195422774E-11 7.541671232374473E-11 1.894523288241087E-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 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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