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18746 (1999 FT20)
Classification: Main-belt Asteroid          SPK-ID: 2018746
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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2873750610744794 4.7878e-08  
a 2.436855523727181 1.1673e-08 au
q 1.7365640187664 1.1345e-07 au
i 4.317804942778436 5.6355e-06 deg
node 6.502167392495897 4.5753e-05 deg
peri 297.3565328828477 4.6715e-05 deg
M 164.3422681443701 1.1131e-05 deg
tp 2458566.207063839043
(2019-Mar-23.70706384)
4.027e-05 TDB
period 1389.450563122016
3.80
9.9838e-06
2.733e-08
d
yr
n .2590952204813251 1.8617e-09 deg/d
Q 3.137147028687962 1.5028e-08 au
  Orbit Determination Parameters
   # obs. used (total)      835  
   data-arc span      9445 days (25.86 yr)  
   first obs. used      1995-03-10  
   last obs. used      2021-01-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52902  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 02:39:51  

Additional Information
 Earth MOID = .724876 au 
 Jupiter MOID = 2.14051 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 15.6   n/a MPO449088  

18746 (1999 FT20)          Discovered 1999-Mar-19 by Spacewatch at Kitt Peak
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 FT20 = 2000 SG170 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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