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120421 (1604 T-2)
Classification: Main-belt Asteroid          SPK-ID: 2120421
[ 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 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .197205447092531 5.138e-08  
a 2.51125061939352 1.1719e-08 au
q 2.016018318234626 1.3117e-07 au
i 7.33265938623147 4.8372e-06 deg
node 342.1621147720475 4.2803e-05 deg
peri 2.183109806976665 4.5041e-05 deg
M 322.7078000398728 1.6293e-05 deg
tp 2459351.073663017958
(2021-May-16.57366302)		 6.6116e-05 TDB
period 1453.561837178353
3.98		 1.0175e-05
2.786e-08		 d
yr
n .2476674819000684 1.7337e-09 deg/d
Q 3.006482920552415 1.403e-08 au
   Orbit Determination Parameters
   # obs. used (total)      584  
   data-arc span      17070 days (46.74 yr)  
   first obs. used      1973-09-19  
   last obs. used      2020-06-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57027  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 17:57:16  

Additional Information
 Earth MOID = 1.00665 au 
 Jupiter MOID = 2.40431 au 
 T_jup = 3.423 
[ 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 15.89   n/a E2021B55  

120421 (1604 T-2)          Discovered 1973-Sep-24 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar
Reference: 20051116/Numbers.arcLast Updated: 2005-11-21

[ show close-approach data ]
Alternate Designations
 1604 T-2 = 2001 TX108 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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