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312587 (2009 HW89)
Classification: Main-belt Asteroid          SPK-ID: 2312587
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 .203264293162167 5.1134e-08  
a 2.638920132990544 3.1663e-08 au
q 2.102521897446809 1.3602e-07 au
i 6.001091629731325 6.0915e-06 deg
node 51.372853967738 6.816e-05 deg
peri 178.063790118314 7.0789e-05 deg
M 209.3252425089303 2.44e-05 deg
tp 2459655.853762261029
(2022-Mar-17.35376226)
0.00011461 TDB
period 1565.805436441162
4.29
2.8181e-05
7.716e-08
d
yr
n .2299136224857064 4.1379e-09 deg/d
Q 3.175318368534279 3.8099e-08 au
  Orbit Determination Parameters
   # obs. used (total)      183  
   data-arc span      5757 days (15.76 yr)  
   first obs. used      2004-01-28  
   last obs. used      2019-11-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60164  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-04 21:32:49  

Additional Information
 Earth MOID = 1.09235 au 
 Jupiter MOID = 1.81502 au 
 T_jup = 3.359 
[ 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 MPO455304  

312587 (2009 HW89)          Discovered 2009-Apr-30 by La Sagra at La Sagra
Reference: 20120109/Numbers.arcLast Updated: 2012-01-11

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