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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1971680448874348 6.7858e-08  
a 2.510232761846978 1.203e-08 au
q 2.015295075981224 1.7045e-07 au
i 7.33223785323762 5.3611e-06 deg
node 342.1762210497952 4.2853e-05 deg
peri 2.291704874734177 4.5177e-05 deg
M 273.045024674977 1.7538e-05 deg
tp 2459351.382212159791
(2021-May-16.88221216)
7.1688e-05 TDB
period 1452.67819242511
3.98
1.0443e-05
2.859e-08
d
yr
n .2478181347232959 1.7815e-09 deg/d
Q 3.005170447712733 1.4402e-08 au
  Orbit Determination Parameters
   # obs. used (total)      566  
   data-arc span      17023 days (46.61 yr)  
   first obs. used      1973-09-19  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57518  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 20:37:43  

Additional Information
 Earth MOID = 1.00777 au 
 Jupiter MOID = 2.40552 au 
 T_jup = 3.424 
[ 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 15.8   n/a MPO432705  

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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