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9531 Jean-Luc (1981 QK)
Classification: Main-belt Asteroid          SPK-ID: 2009531
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 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1859496998027788 6.5555e-08  
a 2.235248674410486 9.2982e-09 au
q 1.819604854419297 1.4533e-07 au
i 5.815649675168912 6.1119e-06 deg
node 359.5856568717868 4.7537e-05 deg
peri 354.3814162760054 4.9257e-05 deg
M 159.6422195086049 1.5226e-05 deg
tp 2457059.206948366813
(2015-Feb-05.70694837)
4.9818e-05 JED
period 1220.638871018979
3.34
7.6164e-06
2.085e-08
d
yr
n .2949275240591635 1.8403e-09 deg/d
Q 2.650892494401675 1.1027e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1174  
   data-arc span      19906 days (54.50 yr)  
   first obs. used      1961-10-17  
   last obs. used      2016-04-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52096  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 13:05:40  

Additional Information
 Earth MOID = .813813 au 
 Jupiter MOID = 2.77381 au 
 T_jup = 3.609 
[ 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 13.9 mag n/a MPO350878  

9531 Jean-Luc           Discovered 1981 Aug. 30 by E. Bowell at the Anderson Mesa Station of the Lowell Observatory.
Jean-Luc Margot (b. 1969), a scientist at the Arecibo Observatory, has used radar interferometry and self-built data-acquisition hardware to make the most detailed topographic maps available for the moon's polar regions. He also led the radar investigation of the binary near-earth-object 2000 DP107.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20010109/MPCPages.arcLast Updated: 2009-05-11

Alternate Designations
 1981 QK = 1961 UU = 1991 QK 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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