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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2390767324893051 4.9779e-08  
a 3.074739583685545 2.6218e-08 au
q 2.339640890762479 1.6328e-07 au
i 9.289521796430988 5.06e-06 deg
node 76.45250850916999 3.1691e-05 deg
peri 194.4033039480436 3.3727e-05 deg
M 345.0537033863931 1.4718e-05 deg
tp 2459282.260216197519
(2021-Mar-08.76021620)
8.1177e-05 TDB
period 1969.29571197662
5.39
2.5188e-05
6.896e-08
d
yr
n .1828064712732559 2.3381e-09 deg/d
Q 3.809838276608612 3.2486e-08 au
  Orbit Determination Parameters
   # obs. used (total)      634  
   data-arc span      7202 days (19.72 yr)  
   first obs. used      2000-10-01  
   last obs. used      2020-06-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50951  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 17:58:41  

Additional Information
 Earth MOID = 1.32307 au 
 Jupiter MOID = 1.31081 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 14.84   n/a E2021B55  
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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