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16420 (1987 UN1)
Classification: Main-belt Asteroid          SPK-ID: 2016420
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .162772655079599 6.3711e-08  
a 2.685573920750287 2.34e-08 au
q 2.248435923257234 1.7092e-07 au
i 12.79102805100544 7.1164e-06 deg
node 227.9958759753888 2.8185e-05 deg
peri 170.8039606488399 3.4427e-05 deg
M 188.4565260735946 2.1786e-05 deg
tp 2458366.494750168777
(2018-Sep-04.99475017)
0.00010159 JED
period 1607.511517337372
4.40
2.101e-05
5.752e-08
d
yr
n .2239486287453119 2.927e-09 deg/d
Q 3.12271191824334 2.7209e-08 au
  Orbit Determination Parameters
   # obs. used (total)      832  
   data-arc span      10399 days (28.47 yr)  
   first obs. used      1987-10-25  
   last obs. used      2016-04-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .54719  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 13:25:01  

Additional Information
 Earth MOID = 1.25611 au 
 Jupiter MOID = 2.29174 au 
 T_jup = 3.320 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.8 mag n/a MPO309282  

16420 (1987 UN1)          Discovered 1987-Oct-28 by Ueda, S., Kaneda, H. at Kushiro
Reference: 20000913/Numbers.arcLast Updated: 2004-04-19
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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