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305970 (2009 HN71)
Classification: Main-belt Asteroid          SPK-ID: 2305970
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 7 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .113248560033382 6.4575e-08  
a 3.008283162412431 3.7925e-08 au
q 2.667599426096554 1.894e-07 au
i 2.509863981577212 7.4032e-06 deg
node 102.9073985159677 0.00024457 deg
peri 352.2242437222686 0.00024977 deg
M 158.2424521767357 4.931e-05 deg
tp 2458162.783634618489
(2018-Feb-13.28363462)
0.00025724 TDB
period 1905.796373785472
5.22
3.604e-05
9.867e-08
d
yr
n .1888974105270932 3.5721e-09 deg/d
Q 3.348966898728308 4.222e-08 au
  Orbit Determination Parameters
   # obs. used (total)      127  
   data-arc span      6433 days (17.61 yr)  
   first obs. used      2001-10-16  
   last obs. used      2019-05-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58725  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 05:55:11  

Additional Information
 Earth MOID = 1.68441 au 
 Jupiter MOID = 1.80653 au 
 T_jup = 3.239 
[ 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 16.4   n/a MPO433971  

305970 (2009 HN71)          Discovered 2009-Apr-22 by Mt. Lemmon Survey at Mount Lemmon
Reference: 20111110/Numbers.arcLast Updated: 2011-11-14

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