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442515 (2011 WR78)
Classification: Main-belt Asteroid          SPK-ID: 2442515
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 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3468599940298794 1.3507e-07  
a 2.578562512115792 4.3882e-08 au
q 1.684162334557638 3.7516e-07 au
i 5.591409378352115 7.9816e-06 deg
node 11.08647366752903 3.6861e-05 deg
peri 29.74551372024705 4.3574e-05 deg
M 39.50767785146192 1.528e-05 deg
tp 2458834.524522537589
(2019-Dec-17.02452254)
6.1766e-05 TDB
period 1512.39392279941
4.14
3.8607e-05
1.057e-07
d
yr
n .2380332230730254 6.0763e-09 deg/d
Q 3.472962689673946 5.9103e-08 au
  Orbit Determination Parameters
   # obs. used (total)      352  
   data-arc span      5807 days (15.90 yr)  
   first obs. used      2004-02-13  
   last obs. used      2020-01-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44032  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-30 11:45:31  

Additional Information
 Earth MOID = .694846 au 
 Jupiter MOID = 1.97656 au 
 T_jup = 3.332 
[ 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 17.3   n/a MPO495192  

442515 (2011 WR78)          Discovered 2008-Jan-18 by Mt. Lemmon Survey at Mount Lemmon
Reference: Last Updated: 2015-09-02

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