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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04677226887763669 5.229e-08  
a 2.74162420297756 2.7014e-08 au
q 2.613392218594457 1.5092e-07 au
i 7.65796946991697 4.478e-06 deg
node 94.26342011350334 4.2e-05 deg
peri 252.4327311556834 6.4038e-05 deg
M 318.5490962859525 4.8958e-05 deg
tp 2459587.415776264029
(2022-Jan-07.91577626)
0.00022559 TDB
period 1658.09845616848
4.54
2.4507e-05
6.71e-08
d
yr
n .2171161782707917 3.209e-09 deg/d
Q 2.869856187360663 2.8278e-08 au
  Orbit Determination Parameters
   # obs. used (total)      225  
   data-arc span      7481 days (20.48 yr)  
   first obs. used      2000-12-20  
   last obs. used      2021-06-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .5343  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 16:30:22  

Additional Information
 Earth MOID = 1.61652 au 
 Jupiter MOID = 2.33551 au 
 T_jup = 3.335 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.51   n/a E2021B25  

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

Alternate Designations
 2011 HW9 = 2009 WS43 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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