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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 5 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1216349159987994 1.0625e-07  
a 2.201910614014621 2.9264e-08 AU
q 1.934081401442088 2.4769e-07 AU
i 4.511209337388355 1.1203e-05 deg
node 176.5794837285564 9.7008e-05 deg
peri 46.3389237365378 0.00010567 deg
M 4.632985075655142 4.9008e-05 deg
tp 2456985.141232904384
(2014-Nov-23.64123290)
0.00016228 JED
period 1193.432757527275
3.27
2.3791e-05
6.514e-08
d
yr
n .3016508452021205 6.0135e-09 deg/d
Q 2.469739826587154 3.2823e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      206  
   data-arc span      5803 days (15.89 yr)  
   first obs. used      1998-03-08  
   last obs. used      2014-01-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .6133  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-11 14:52:27  

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 (327)
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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