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181791 (1998 EX9)
Classification: Main-belt Asteroid          SPK-ID: 2181791
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 6 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1216349192084745 8.6549e-08  
a 2.201910613202334 2.4186e-08 AU
q 1.934081393661185 1.9697e-07 AU
i 4.51121043699326 1.0474e-05 deg
node 176.5794891732099 9.496e-05 deg
peri 46.33891776996034 0.00010319 deg
M 4.632986032774386 4.3757e-05 deg
tp 2456985.141229739945
(2014-Nov-23.64122974)
0.00014494 JED
period 1193.432756866888
3.27
1.9663e-05
5.383e-08
d
yr
n .3016508453690395 4.97e-09 deg/d
Q 2.469739832743482 2.7128e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      210  
   data-arc span      6322 days (17.31 yr)  
   first obs. used      1998-03-08  
   last obs. used      2015-06-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .60822  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jul-06 15:33:44  

Additional Information
 Earth MOID = .930561 AU 
 T_jup = 3.650 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 17.1 mag n/a MPO245282  

181791 (1998 EX9)          Discovered 1998-Mar-08 by Beijing Schmidt CCD Asteroid Program at Xinglong
Reference: 20080420/Numbers.arcLast Updated: 2008-04-23

[ show close-approach data ]
Alternate Designations
 1998 EX9 = 2002 PA35 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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