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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 ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07958215803447494 1.2615e-07  
a 2.540325589577363 1.6751e-08 au
q 2.338160997048596 3.2687e-07 au
i 11.28703678934072 5.6459e-06 deg
node 330.9357350090546 2.0457e-05 deg
peri 252.6814519628851 0.00012124 deg
M 171.8254314783815 0.00013542 deg
tp 2458494.641833305218
(2019-Jan-11.14183331)
0.00055178 TDB
period 1478.878521204777
4.05
1.4628e-05
4.005e-08
d
yr
n .2434277020310796 2.4078e-09 deg/d
Q 2.742490182106129 1.8085e-08 au
  Orbit Determination Parameters
   # obs. used (total)      928  
   data-arc span      8354 days (22.87 yr)  
   first obs. used      1998-02-26  
   last obs. used      2021-01-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58221  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 09:25:53  

Additional Information
 Earth MOID = 1.35946 au 
 Jupiter MOID = 2.31339 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 15.31   n/a E2021B55  
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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