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9281 Weryk (1981 EJ15)
Classification: Main-belt Asteroid          SPK-ID: 2009281
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1714354780816623 3.0063e-08  
a 2.449664958819818 8.893e-09 au
q 2.029705475464647 7.3258e-08 au
i 2.196868506428447 3.8247e-06 deg
node 272.05467442247 9.2569e-05 deg
peri 137.0510353347042 9.3519e-05 deg
M 198.2527877787698 1.5306e-05 deg
tp 2459629.705869258639
(2022-Feb-19.20586926)
6.1839e-05 TDB
period 1400.420506928396
3.83
7.6259e-06
2.088e-08
d
yr
n .2570656443682076 1.3998e-09 deg/d
Q 2.869624442174989 1.0418e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1609  
   data-arc span      14891 days (40.77 yr)  
   first obs. used      1979-10-14  
   last obs. used      2020-07-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49173  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 03:14:48  

Additional Information
 Earth MOID = 1.04067 au 
 Jupiter MOID = 2.50275 au 
 T_jup = 3.475 
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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.6   n/a MPO381338  

9281 Weryk           Discovered 1981 Mar. 1 by S. J. Bus at Siding Spring.
Robert J. Weryk (b. 1981) is a researcher at Mount Allison University in Sackville, New Brunswick, who has performed fundamental work on radar and optical measurements of meteors. In particular, his techniques for automatic real-time video detection of meteors are widely used.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2014-07-12Last Updated: 2014-08-13

Alternate Designations
 1981 EJ15 = 1979 TV1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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