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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .186290097279539 3.8091e-08  
a 2.234185793001561 6.3852e-09 au
q 1.817979104282736 8.373e-08 au
i 5.812401666490198 3.8318e-06 deg
node 359.553279116642 3.2259e-05 deg
peri 354.6545256843756 3.3558e-05 deg
M 212.3523536750135 1.1529e-05 deg
tp 2459500.766455579691
(2021-Oct-13.26645558)
4.0339e-05 TDB
period 1219.768336924793
3.34
5.229e-06
1.432e-08
d
yr
n .2951380103107206 1.2652e-09 deg/d
Q 2.650392481720386 7.5747e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2023  
   data-arc span      21427 days (58.66 yr)  
   first obs. used      1961-10-17  
   last obs. used      2020-06-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47906  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 16:59:11  

Additional Information
 Earth MOID = .813244 au 
 Jupiter MOID = 2.7853 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 13.9   n/a MPO350878  
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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