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187712 (2008 ET54)
Classification: Main-belt Asteroid          SPK-ID: 2187712
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1602275043425764 5.5429e-08  
a 2.42116981798818 1.6731e-08 au
q 2.033231820462364 1.3334e-07 au
i 3.326030851674348 6.023e-06 deg
node 83.97268368751243 0.00010969 deg
peri 87.93647489669895 0.00011191 deg
M 153.4791020466444 2.6701e-05 deg
tp 2458613.844626665482
(2019-May-10.34462667)
9.8057e-05 TDB
period 1376.056619983621
3.77
1.4264e-05
3.905e-08
d
yr
n .2616171418907786 2.7118e-09 deg/d
Q 2.809107815513996 1.9412e-08 au
  Orbit Determination Parameters
   # obs. used (total)      202  
   data-arc span      7565 days (20.71 yr)  
   first obs. used      1999-12-07  
   last obs. used      2020-08-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .63806  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 07:48:08  

Additional Information
 Earth MOID = 1.04165 au 
 Jupiter MOID = 2.15914 au 
 T_jup = 3.493 
[ 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 17.4   n/a MPO470025  

187712 (2008 ET54)          Discovered 2008-Mar-06 by Spacewatch at Kitt Peak
Reference: 20080520/Numbers.arcLast Updated: 2008-05-22
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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