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JPL Small-Body Database Browser
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20257 (1998 FL6)
Classification: Main-belt Asteroid          SPK-ID: 2020257
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1907258411948245 4.215e-08  
a 2.488735073984917 1.1468e-08 au
q 2.01406898348808 1.0637e-07 au
i 5.319842535337385 3.4112e-06 deg
node 39.68413946342184 4.6059e-05 deg
peri 332.9658949497864 4.7158e-05 deg
M 305.5945719848237 9.8402e-06 deg
tp 2458817.223576963769
(2019-Nov-29.72357696)
3.8902e-05 TDB
period 1434.057051902855
3.93
9.9122e-06
2.714e-08
d
yr
n .2510360375985842 1.7352e-09 deg/d
Q 2.963401164481754 1.3655e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1621  
   data-arc span      14302 days (39.16 yr)  
   first obs. used      1980-10-10  
   last obs. used      2019-12-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48156  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 00:42:57  

Additional Information
 Earth MOID = 1.01568 au 
 Jupiter MOID = 2.49749 au 
 T_jup = 3.443 
[ 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 14.3   n/a MPO347681  
diameter diameter 3.022 km 0.445 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.307   0.070 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20257 (1998 FL6)          Discovered 1998-Mar-18 by Spacewatch at Kitt Peak
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1998 FL6 = 1980 TQ12 = 2000 SS172 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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