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21143 (1993 FX31)
Classification: Main-belt Asteroid          SPK-ID: 2021143
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 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09923464399577878 3.6537e-08  
a 2.689410943608717 1.2329e-08 au
q 2.422528206061355 1.0129e-07 au
i 3.899090717122075 3.8879e-06 deg
node 113.3704665970618 6.6139e-05 deg
peri 242.5599975233446 7.013e-05 deg
M 303.6829593096715 2.4998e-05 deg
tp 2459452.512163913201
(2021-Aug-26.01216391)
0.00011227 TDB
period 1610.957853904651
4.41
1.1078e-05
3.033e-08
d
yr
n .2234695334377802 1.5367e-09 deg/d
Q 2.95629368115608 1.3553e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1397  
   data-arc span      10954 days (29.99 yr)  
   first obs. used      1990-08-26  
   last obs. used      2020-08-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50177  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 01:58:41  

Additional Information
 Earth MOID = 1.41899 au 
 Jupiter MOID = 2.44719 au 
 T_jup = 3.362 
[ 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 14.22   n/a E2021B10  
diameter diameter 6.214 km 0.277 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.080   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21143 (1993 FX31)          Discovered 1993-Mar-19 by UESAC at La Silla
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1993 FX31 = 1990 QF17 = 1994 NS8 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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