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21137 (1993 FX20)
Classification: Main-belt Asteroid          SPK-ID: 2021137
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 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0874937984202607 3.6949e-08  
a 2.919763757275691 1.3335e-08 au
q 2.664302535661829 1.0732e-07 au
i 1.901871073557439 4.443e-06 deg
node 179.0490237388793 0.00011964 deg
peri 153.44721025 0.00012309 deg
M 66.65858037088566 2.8818e-05 deg
tp 2458863.077874771647
(2020-Jan-14.57787477)
0.00014621 TDB
period 1822.300511147133
4.99
1.2484e-05
3.418e-08
d
yr
n .1975524880763936 1.3534e-09 deg/d
Q 3.175224978889553 1.4502e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1787  
   data-arc span      10179 days (27.87 yr)  
   first obs. used      1993-03-21  
   last obs. used      2021-02-01  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53431  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:40:21  

Additional Information
 Earth MOID = 1.65206 au 
 Jupiter MOID = 2.11975 au 
 T_jup = 3.274 
[ 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 14.1   n/a MPO347686  
diameter diameter 4.224 km 0.337 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.249   0.046 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21137 (1993 FX20)          Discovered 1993-Mar-21 by UESAC at La Silla
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1993 FX20 = 1998 FN66 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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