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JPL Small-Body Database Browser
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523977 (1999 ET2)
Classification: Inner Main-belt Asteroid          SPK-ID: 2523977
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02464247750574135 1.1506e-07  
a 1.995169476782402 2.2148e-08 au
q 1.94600355783065 2.3343e-07 au
i 24.30022936895186 1.1163e-05 deg
node 144.0304000745991 1.2151e-05 deg
peri 161.3395920377811 0.00013955 deg
M 248.0322046553644 0.00013784 deg
tp 2458920.653859194520
(2020-Mar-12.15385919)
0.0003948 TDB
period 1029.361960332186
2.82
1.714e-05
4.693e-08
d
yr
n .3497312061967243 5.8235e-09 deg/d
Q 2.044335395734155 2.2694e-08 au
  Orbit Determination Parameters
   # obs. used (total)      90  
   data-arc span      7388 days (20.23 yr)  
   first obs. used      1999-03-10  
   last obs. used      2019-06-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .62248  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 08:40:53  

Additional Information
 Earth MOID = .934821 au 
 Jupiter MOID = 3.05296 au 
 T_jup = 3.736 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 17.8   n/a MPO415661  

523977 (1999 ET2)          Discovered 1999-Mar-10 by Spacewatch at Kitt Peak
Reference: Last Updated: 2019-05-29

Alternate Designations
 1999 ET2 = 2014 NF48 = 2016 CG148 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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