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JPL Small-Body Database Browser
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305509 (2008 ET146)
Classification: Main-belt Asteroid          SPK-ID: 2305509
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 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0422081132291247 6.6149e-08  
a 3.089400022704463 4.9392e-08 au
q 2.959002276736093 1.8733e-07 au
i 11.20769811609606 6.8954e-06 deg
node 104.901832968939 3.7548e-05 deg
peri 13.01718979161485 0.00010357 deg
M 71.20912222164873 0.00010115 deg
tp 2458208.177896941378
(2018-Mar-30.67789694)
0.00055321 TDB
period 1983.396967898106
5.43
4.7565e-05
1.302e-07
d
yr
n .1815067814596429 4.3528e-09 deg/d
Q 3.219797768672833 5.1477e-08 au
  Orbit Determination Parameters
   # obs. used (total)      154  
   data-arc span      6760 days (18.51 yr)  
   first obs. used      2000-11-27  
   last obs. used      2019-06-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .66585  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 05:54:48  

Additional Information
 Earth MOID = 1.97673 au 
 Jupiter MOID = 1.88014 au 
 T_jup = 3.195 
[ 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 16.0   n/a MPO345830  

305509 (2008 ET146)          Discovered 2008-Mar-10 by CSS at Catalina
Reference: 20111110/Numbers.arcLast Updated: 2011-11-14

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