Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
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 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1862900963374441 3.8055e-08  
a 2.234185792860983 6.3814e-09 au
q 1.817979106273161 8.3657e-08 au
i 5.812401684133121 3.8301e-06 deg
node 359.5532787627747 3.2197e-05 deg
peri 354.6545262383552 3.3497e-05 deg
M 212.3523536223472 1.1528e-05 deg
tp 2459500.766455710921
(2021-Oct-13.26645571)
4.0337e-05 TDB
period 1219.768336809668
3.34
5.2259e-06
1.431e-08
d
yr
n .2951380103385764 1.2645e-09 deg/d
Q 2.650392479448804 7.5702e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2044  
   data-arc span      21451 days (58.73 yr)  
   first obs. used      1961-10-17  
   last obs. used      2020-07-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47997  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 03:13:00  

Additional Information
 Earth MOID = .813244 au 
 Jupiter MOID = 2.7853 au 
 T_jup = 3.610 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456871.5 (2014-Aug-02.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1864531457109954 3.8104e-08  
q 1.817955848212422 8.3833e-08 au
tp 2457059.132295473731
(2015-Feb-05.63229547)
3.4775e-05 TDB
node 359.587656019352 3.2175e-05 deg
peri 354.2853513574465 3.3473e-05 deg
i 5.815591317929393 3.8302e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2044  
   data-arc span      21451 days (58.73 yr)  
   first obs. used      1961-10-17  
   last obs. used      2020-07-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47997  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 03:13:00  

Additional Information
 Jupiter MOID = 2.7853 au 
 T_jup = 3.610 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.451896746794887E-15 -3.188712090358761E-15 3.539565105325497E-13 -6.64049116227255E-16 5.724590457230992E-14 -9.019149777693972E-16
q -3.188712090358761E-15 7.028018259452643E-15 -7.153169272147467E-13 2.100969469137365E-15 -1.109571946477121E-13 1.92963192676364E-15
tp 3.539565105325497E-13 -7.153169272147467E-13 1.209292415512224E-9 1.005606984992877E-12 3.277142675603017E-10 -2.676397170948444E-12
node -6.64049116227255E-16 2.100969469137365E-15 1.005606984992877E-12 1.035237786429534E-9 -1.029135081135053E-9 3.720354247407206E-12
peri 5.724590457230992E-14 -1.109571946477121E-13 3.277142675603017E-10 -1.029135081135053E-9 1.120410407284788E-9 -4.410761243750915E-12
i -9.019149777693972E-16 1.92963192676364E-15 -2.676397170948444E-12 3.720354247407206E-12 -4.410761243750915E-12 1.467076148694571E-11

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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Dec-01 09:26 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin