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9531 Jean-Luc (1981 QK)
Classification: Main-belt Asteroid          SPK-ID: 2009531
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .186376330261946 1.1257e-08  
a 2.23420805579221 5.6735e-09 au
q 1.817804557311981 2.5023e-08 au
i 5.812451225185805 8.9348e-07 deg
node 359.5527694719276 8.6521e-06 deg
peri 354.6369596658106 9.8977e-06 deg
M 271.4099842255116 6.1907e-06 deg
tp 2459500.669198240467
(2021-Oct-13.16919824)
2.1609e-05 TDB
period 1219.786568744317
3.34
4.6462e-06
1.272e-08
d
yr
n .2951335989628041 1.1242e-09 deg/d
Q 2.65061155427244 6.7309e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2074  
   data-arc span      21451 days (58.73 yr)  
   first obs. used      1961-10-17  
   last obs. used      2020-07-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48096  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 21:26:13  

Additional Information
 Earth MOID = .811357 au 
 Jupiter MOID = 2.78571 au 
 T_jup = 3.610 
[ 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 13.95   n/a E2021B10  
diameter diameter 4.176 km 0.228 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.279   0.050 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

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 | Mission Design | Physical Parameters | Discovery Circumstances ]
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