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101171 (1998 SA4)
Classification: Main-belt Asteroid          SPK-ID: 2101171
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 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1589793837060627 3.1197e-08  
a 2.399570689018053 9.2664e-09 au
q 2.01808841971883 7.8633e-08 au
i 2.141905027965312 3.4663e-06 deg
node 39.28802531709821 0.00010419 deg
peri 16.4803115077811 0.00010502 deg
M 274.458103442851 1.3824e-05 deg
tp 2459323.107993062592
(2021-Apr-18.60799306)
5.2732e-05 TDB
period 1357.684154511855
3.72
7.8644e-06
2.153e-08
d
yr
n .265157399682134 1.5359e-09 deg/d
Q 2.781052958317275 1.074e-08 au
  Orbit Determination Parameters
   # obs. used (total)      768  
   data-arc span      8991 days (24.62 yr)  
   first obs. used      1996-03-19  
   last obs. used      2020-10-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54497  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 20:02:02  

Additional Information
 Earth MOID = 1.02987 au 
 Jupiter MOID = 2.55678 au 
 T_jup = 3.508 
[ 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 16.0   n/a MPO436472  

101171 (1998 SA4)          Discovered 1998-Sep-18 by ODAS at Caussols
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Alternate Designations
 1998 SA4 = 2000 GK17 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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