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21191 (1994 JL6)
Classification: Main-belt Asteroid          SPK-ID: 2021191
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0138054457872707 3.6458e-08  
a 2.529067339349537 9.2664e-09 au
q 2.49415243730379 9.1345e-08 au
i 2.322849916840606 4.7127e-06 deg
node 200.3249557096199 8.5207e-05 deg
peri 102.5515441459701 0.00022564 deg
M 147.9096265355474 0.00020607 deg
tp 2458596.922619042420
(2019-Apr-23.42261904)
0.00084106 TDB
period 1469.05825019109
4.02
8.0738e-06
2.21e-08
d
yr
n .2450549526903869 1.3468e-09 deg/d
Q 2.563982241395284 9.3943e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1117  
   data-arc span      9786 days (26.79 yr)  
   first obs. used      1994-05-04  
   last obs. used      2021-02-17  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55089  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:41:10  

Additional Information
 Earth MOID = 1.47789 au 
 Jupiter MOID = 2.43553 au 
 T_jup = 3.450 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.1   n/a MPO431744  
diameter diameter 2.409 km 0.304 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.304   0.093 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21191 (1994 JL6)          Discovered 1994-May-04 by Spacewatch at Kitt Peak
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1994 JL6 = 1999 RU73 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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