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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .190934164354386 3.7064e-08  
a 2.489116098186843 9.9458e-09 au
q 2.013858795998488 9.1444e-08 au
i 5.319243112131779 3.0003e-06 deg
node 39.67376209184584 4.4656e-05 deg
peri 333.0660989145418 4.5629e-05 deg
M 96.1268153857125 9.4693e-06 deg
tp 2458817.491677339973
(2019-Nov-29.99167734)
3.8057e-05 TDB
period 1434.386394726059
3.93
8.5971e-06
2.354e-08
d
yr
n .2509783983755321 1.5043e-09 deg/d
Q 2.964373400375198 1.1845e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1975  
   data-arc span      14765 days (40.42 yr)  
   first obs. used      1980-10-10  
   last obs. used      2021-03-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46054  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:16:13  

Additional Information
 Earth MOID = 1.01485 au 
 Jupiter MOID = 2.50087 au 
 T_jup = 3.442 
[ 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 14.32   n/a E2021B10  
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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