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JPL Small-Body Database Browser
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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3467029604002884 1.5921e-07  
a 2.578303495505027 5.3928e-08 au
q 1.684398040803023 4.4408e-07 au
i 5.591454842762697 8.5655e-06 deg
node 11.0927676446571 4.1797e-05 deg
peri 29.72558533179826 4.7783e-05 deg
M 304.2906848516797 1.6444e-05 deg
tp 2458834.504819322057
(2019-Dec-17.00481932)
7.395e-05 TDB
period 1512.166048562173
4.14
4.7443e-05
1.299e-07
d
yr
n .2380690932337107 7.4693e-09 deg/d
Q 3.472208950207031 7.2625e-08 au
  Orbit Determination Parameters
   # obs. used (total)      320  
   data-arc span      5736 days (15.70 yr)  
   first obs. used      2004-02-13  
   last obs. used      2019-10-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43727  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-08 16:00:57  

Additional Information
 Earth MOID = .694495 au 
 Jupiter MOID = 1.97518 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 17.4   n/a MPO349190  

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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