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120428 (2128 T-3)
Classification: Main-belt Asteroid          SPK-ID: 2120428
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 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1201617605578544 3.949e-08  
a 3.143831588581411 2.7486e-08 au
q 2.766063250000073 1.3586e-07 au
i 7.797441228038033 5.2477e-06 deg
node 215.9148796870506 2.9383e-05 deg
peri 90.84803848685077 3.7647e-05 deg
M 279.7736291603399 2.5038e-05 deg
tp 2459454.234688481749
(2021-Aug-27.73468848)
0.00014448 TDB
period 2036.044833436235
5.57
2.6701e-05
7.31e-08
d
yr
n .1768133953084066 2.3188e-09 deg/d
Q 3.52159992716275 3.0789e-08 au
  Orbit Determination Parameters
   # obs. used (total)      664  
   data-arc span      21765 days (59.59 yr)  
   first obs. used      1960-10-22  
   last obs. used      2020-05-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54801  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 17:57:13  

Additional Information
 Earth MOID = 1.7659 au 
 Jupiter MOID = 1.7566 au 
 T_jup = 3.184 
[ 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 14.85   n/a E2021B55  
diameter diameter 6.584 km 0.143 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.054   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

120428 (2128 T-3)          Discovered 1977-Oct-16 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
 2128 T-3 = 2000 WC177 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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