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357323 (2003 HR20)
Classification: Main-belt Asteroid          SPK-ID: 2357323
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 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1722858568965544 5.4368e-08  
a 2.249231172604137 9.5434e-09 au
q 1.861720452673592 1.1899e-07 au
i 4.920114140635762 5.4443e-06 deg
node 208.8397543419691 5.5909e-05 deg
peri 18.90587448464953 5.816e-05 deg
M 16.73918951182571 1.4372e-05 deg
tp 2458943.209647668976
(2020-Apr-03.70964767)
4.9129e-05 TDB
period 1232.110241932452
3.37
7.8417e-06
2.147e-08
d
yr
n .2921816471839184 1.8596e-09 deg/d
Q 2.636741892534683 1.1188e-08 au
  Orbit Determination Parameters
   # obs. used (total)      218  
   data-arc span      6264 days (17.15 yr)  
   first obs. used      2003-04-24  
   last obs. used      2020-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59707  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-24 06:34:31  

Additional Information
 Earth MOID = .852933 au 
 Jupiter MOID = 2.34712 au 
 T_jup = 3.604 
[ 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 17.4   n/a MPO427814  

357323 (2003 HR20)          Discovered 2003-Apr-24 by LONEOS at Anderson Mesa
Reference: 20130327/Numbers.arcLast Updated: 2013-03-29

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