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187721 (2008 EJ123)
Classification: Main-belt Asteroid          SPK-ID: 2187721
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 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1253307162978134 3.7224e-08  
a 3.095436895567287 2.4817e-08 au
q 2.707483572191159 1.0956e-07 au
i 2.351217514316976 5.2261e-06 deg
node 184.7377054982228 0.00010346 deg
peri 62.33792075363855 0.00010664 deg
M 80.93748135394104 2.3042e-05 deg
tp 2458753.272455151230
(2019-Sep-26.77245515)
0.00012806 TDB
period 1989.213321841497
5.45
2.3922e-05
6.549e-08
d
yr
n .1809760652853124 2.1764e-09 deg/d
Q 3.483390218943415 2.7927e-08 au
  Orbit Determination Parameters
   # obs. used (total)      314  
   data-arc span      6783 days (18.57 yr)  
   first obs. used      2002-02-20  
   last obs. used      2020-09-16  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53808  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:56:34  

Additional Information
 Earth MOID = 1.69342 au 
 Jupiter MOID = 1.53921 au 
 T_jup = 3.210 
[ 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 16.02   n/a E2021B55  

187721 (2008 EJ123)          Discovered 2008-Mar-09 by Spacewatch at Kitt Peak
Reference: 20080520/Numbers.arcLast Updated: 2008-05-22

[ show close-approach data ]
Alternate Designations
 2008 EJ123 = 2003 KW12 = 2005 UQ212 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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