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JPL Small-Body Database Browser
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347202 (2011 HD21)
Classification: Main-belt Asteroid          SPK-ID: 2347202
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 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2512712851458531 6.6201e-08  
a 3.189249040976986 7.3096e-08 au
q 2.38788233580052 2.0186e-07 au
i 26.05375264145348 1.4995e-05 deg
node 32.45927777564719 1.9367e-05 deg
peri 241.6541286182667 4.3391e-05 deg
M 182.5496937907499 4.8404e-05 deg
tp 2460025.928372223595
(2023-Mar-22.42837222)
0.00030624 TDB
period 2080.324468785003
5.70
7.152e-05
1.958e-07
d
yr
n .1730499282211756 5.9493e-09 deg/d
Q 3.990615746153454 9.1462e-08 au
  Orbit Determination Parameters
   # obs. used (total)      117  
   data-arc span      5021 days (13.75 yr)  
   first obs. used      2005-04-05  
   last obs. used      2019-01-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59951  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 18:20:03  

Additional Information
 Earth MOID = 1.47715 au 
 Jupiter MOID = 1.49091 au 
 T_jup = 2.993 
[ 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 MPO455520  

347202 (2011 HD21)          Discovered 2005-Apr-05 by NEAT at Palomar
Reference: 20121128/Numbers.arcLast Updated: 2012-12-03

[ show close-approach data ]
Alternate Designations
 2011 HD21 = 2006 PM28 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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