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266589 (2008 HN61)
Classification: Main-belt Asteroid          SPK-ID: 2266589
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 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08506573357624705 4.8481e-08  
a 2.418093424698146 1.6396e-08 au
q 2.212396533670299 1.2417e-07 au
i 4.955136556459453 5.8963e-06 deg
node 233.3354600566656 6.0835e-05 deg
peri 29.09859700425005 7.0922e-05 deg
M 47.2048920932569 3.8289e-05 deg
tp 2458820.408776129377
(2019-Dec-02.90877613)
0.0001457 TDB
period 1373.434780135542
3.76
1.3969e-05
3.825e-08
d
yr
n .262116560033868 2.666e-09 deg/d
Q 2.623790315725993 1.7791e-08 au
  Orbit Determination Parameters
   # obs. used (total)      243  
   data-arc span      21402 days (58.60 yr)  
   first obs. used      1960-10-24  
   last obs. used      2019-05-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59449  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-25 12:48:10  

Additional Information
 Earth MOID = 1.19852 au 
 Jupiter MOID = 2.41538 au 
 T_jup = 3.505 
[ 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 16.8   n/a MPO433731  

266589 (2008 HN61)          Discovered 2008-Apr-30 by Mt. Lemmon Survey at Mount Lemmon
Reference: 20110218/Numbers.arcLast Updated: 2011-02-22

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