Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Near-Earth Object (NEO) Program
Search JPL
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 | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1862322477112238 7.5269e-08  
a 2.23443773438563 9.9765e-09 au
q 1.81831337274022 1.6864e-07 au
i 5.81588055135915 7.4936e-06 deg
node 359.5847367224027 4.7969e-05 deg
peri 354.2881541265727 4.9655e-05 deg
M 100.7419486274114 1.5139e-05 deg
tp 2457059.103818999774
(2015-Feb-05.60381900)
5.0086e-05 JED
period 1219.974666309365
3.34
8.1705e-06
2.237e-08
d
yr
n .2950880948118885 1.9763e-09 deg/d
Q 2.65056209603104 1.1834e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1051  
   data-arc span      19781 days (54.16 yr)  
   first obs. used      1961-10-17  
   last obs. used      2015-12-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .517  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 13:10:58  

Additional Information
 Earth MOID = .811566 au 
 Jupiter MOID = 2.77355 au 
 T_jup = 3.610 
[ 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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2016-Feb-06 02:52 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin