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JPL Small-Body Database Browser
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108198 (2001 HS21)
Classification: Main-belt Asteroid          SPK-ID: 2108198
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1379725349572301 4.4439e-08  
a 2.701208512311184 1.4031e-08 au
q 2.328515926419561 1.2071e-07 au
i 5.645662811348518 4.685e-06 deg
node 208.8257344750502 4.7146e-05 deg
peri 48.21159316046577 5.0523e-05 deg
M 77.98705241856391 1.5901e-05 deg
tp 2458649.218242666313
(2019-Jun-14.71824267)
7.1719e-05 TDB
period 1621.569590313492
4.44
1.2635e-05
3.459e-08
d
yr
n .2220071233146415 1.7298e-09 deg/d
Q 3.073901098202806 1.5967e-08 au
  Orbit Determination Parameters
   # obs. used (total)      498  
   data-arc span      9971 days (27.30 yr)  
   first obs. used      1992-05-01  
   last obs. used      2019-08-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60875  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 03:10:35  

Additional Information
 Earth MOID = 1.31841 au 
 Jupiter MOID = 1.97767 au 
 T_jup = 3.347 
[ 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 15.7   n/a MPO436519  

108198 (2001 HS21)          Discovered 2001-Apr-23 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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