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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1588878592287802 3.0995e-08  
a 2.398589420965711 9.1299e-09 au
q 2.017482682699669 7.8209e-08 au
i 2.142088512843303 3.4503e-06 deg
node 39.27455699886915 0.00010084 deg
peri 16.63252411554213 0.00010169 deg
M 327.3715625980818 1.3723e-05 deg
tp 2459323.477616804651
(2021-Apr-18.97761680)
5.195e-05 TDB
period 1356.851433132735
3.71
7.747e-06
2.121e-08
d
yr
n .2653201310100859 1.5149e-09 deg/d
Q 2.779696159231752 1.0581e-08 au
  Orbit Determination Parameters
   # obs. used (total)      805  
   data-arc span      9085 days (24.87 yr)  
   first obs. used      1996-03-19  
   last obs. used      2021-02-01  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55047  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:35:32  

Additional Information
 Earth MOID = 1.02854 au 
 Jupiter MOID = 2.55796 au 
 T_jup = 3.509 
[ 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 16.11   n/a E2021B55  

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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