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120779 (1998 ET8)
Classification: Main-belt Asteroid          SPK-ID: 2120779
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07966850376597312 1.4193e-07  
a 2.540281165631661 1.8632e-08 au
q 2.337900766020904 3.6975e-07 au
i 11.28701151806986 7.7818e-06 deg
node 330.9357650710277 2.173e-05 deg
peri 252.7498109487108 0.00012496 deg
M 123.0555359314483 0.00014052 deg
tp 2458495.001624021490
(2019-Jan-11.50162402)
0.00057345 TDB
period 1478.839728540459
4.05
1.627e-05
4.454e-08
d
yr
n .2434340875838533 2.6783e-09 deg/d
Q 2.742661565242418 2.0117e-08 au
  Orbit Determination Parameters
   # obs. used (total)      776  
   data-arc span      8191 days (22.43 yr)  
   first obs. used      1998-02-26  
   last obs. used      2020-07-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .62014  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 10:10:59  

Additional Information
 Earth MOID = 1.36023 au 
 Jupiter MOID = 2.31447 au 
 T_jup = 3.414 
[ 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 15.3   n/a MPO469252  
diameter diameter 4.359 km 0.154 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.077   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

120779 (1998 ET8)          Discovered 1998-Mar-05 by BAO Schmidt CCD Asteroid Program at Xinglong
Reference: 20060314/Numbers.arcLast Updated: 2006-03-23

[ show close-approach data ]
Alternate Designations
 1998 ET8 = 2002 AM155 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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