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379763 (2011 HW9)
Classification: Main-belt Asteroid          SPK-ID: 2379763
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 .046495640615081 5.7656e-08  
a 2.739304362365275 2.9065e-08 au
q 2.611938651197416 1.6309e-07 au
i 7.660809282671699 4.5365e-06 deg
node 94.2662330844111 4.7454e-05 deg
peri 253.4753583475444 7.0276e-05 deg
M 231.4485518187594 5.3207e-05 deg
tp 2459591.834657492113
(2022-Jan-12.33465749)
0.00024585 TDB
period 1655.994387531342
4.53
2.6356e-05
7.216e-08
d
yr
n .217392041126822 3.46e-09 deg/d
Q 2.866670073533135 3.0417e-08 au
  Orbit Determination Parameters
   # obs. used (total)      213  
   data-arc span      7094 days (19.42 yr)  
   first obs. used      2000-12-20  
   last obs. used      2020-05-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54483  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 18:02:00  

Additional Information
 Earth MOID = 1.6163 au 
 Jupiter MOID = 2.34168 au 
 T_jup = 3.336 
[ 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 16.2   n/a MPO423398  

379763 (2011 HW9)          Discovered 2008-Oct-08 by CSS at Catalina
Reference: Last Updated: 2013-11-20

[ show close-approach data ]
Alternate Designations
 2011 HW9 = 2009 WS43 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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