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16640 (1993 QU9)
Classification: Main-belt Asteroid          SPK-ID: 2016640
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 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1495056623417505 2.7343e-08  
a 2.347860845648912 9.1153e-09 au
q 1.996842354833909 6.7025e-08 au
i 7.28550996826222 3.2869e-06 deg
node 146.8731329969683 3.2252e-05 deg
peri 152.8792551479921 3.5643e-05 deg
M 297.7689043046586 1.5835e-05 deg
tp 2459623.649561993975
(2022-Feb-13.14956199)
5.8288e-05 TDB
period 1314.03507208298
3.60
7.6524e-06
2.095e-08
d
yr
n .2739652903094403 1.5955e-09 deg/d
Q 2.698879336463915 1.0478e-08 au
  Orbit Determination Parameters
   # obs. used (total)      871  
   data-arc span      10158 days (27.81 yr)  
   first obs. used      1993-08-15  
   last obs. used      2021-06-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .5651  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 17:41:11  

Additional Information
 Earth MOID = .984088 au 
 Jupiter MOID = 2.52451 au 
 T_jup = 3.534 
[ 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 15.91   n/a MPCxxxxx  

16640 (1993 QU9)          Discovered 1993-Aug-20 by Elst, E. W. at La Silla
Reference: 20000913/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1993 QU9 = 1996 LB 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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