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357482 (2004 HR4)
Classification: Main-belt Asteroid          SPK-ID: 2357482
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 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .169583714358623 6.5543e-08  
a 2.745410905536512 3.1688e-08 au
q 2.27983392673496 1.7792e-07 au
i 8.090388436296083 7.5836e-06 deg
node 186.0689306135227 3.8906e-05 deg
peri 18.12620069565054 4.3269e-05 deg
M 197.2687201431823 2.3119e-05 deg
tp 2459751.565819443145
(2022-Jun-21.06581944)
0.0001158 TDB
period 1661.53486433238
4.55
2.8766e-05
7.876e-08
d
yr
n .2166671357477963 3.7512e-09 deg/d
Q 3.210987884338064 3.7062e-08 au
  Orbit Determination Parameters
   # obs. used (total)      162  
   data-arc span      14113 days (38.64 yr)  
   first obs. used      1981-03-02  
   last obs. used      2019-10-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .6042  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-08 11:08:37  

Additional Information
 Earth MOID = 1.27827 au 
 Jupiter MOID = 1.74777 au 
 T_jup = 3.313 
[ 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 16.6   n/a MPO455581  

357482 (2004 HR4)          Discovered 2004-Apr-16 by LINEAR at Socorro
Reference: 20130327/Numbers.arcLast Updated: 2013-03-29

[ show close-approach data ]
Alternate Designations
 2004 HR4 = 1981 EK46 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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