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120221 (2004 FJ18)
Classification: Main-belt Asteroid          SPK-ID: 2120221
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2390016901781179 4.9999e-08  
a 3.074709527670729 2.6665e-08 au
q 2.339848753750662 1.6383e-07 au
i 9.289508389231207 5.1571e-06 deg
node 76.45332653875117 3.171e-05 deg
peri 194.3793765271573 3.3744e-05 deg
M 308.503323267408 1.4421e-05 deg
tp 2459282.196382490210
(2021-Mar-08.69638249)
8.1185e-05 TDB
period 1969.266836830528
5.39
2.5617e-05
7.014e-08
d
yr
n .1828091517447217 2.3781e-09 deg/d
Q 3.809570301590796 3.3038e-08 au
  Orbit Determination Parameters
   # obs. used (total)      616  
   data-arc span      7147 days (19.57 yr)  
   first obs. used      2000-10-01  
   last obs. used      2020-04-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50972  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 20:35:33  

Additional Information
 Earth MOID = 1.32506 au 
 Jupiter MOID = 1.31181 au 
 T_jup = 3.166 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.7   n/a MPO432704  
diameter diameter 3.682 km 0.090 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.157   0.029 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

120221 (2004 FJ18)          Discovered 2004-Mar-28 by Yeung, W. K. Y. at Desert Eagle
Reference: 20051116/Numbers.arcLast Updated: 2005-11-21

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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