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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.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1703818112701177 2.9426e-08  
a 2.451299333847109 9.0041e-09 au
q 2.033642513381006 7.1614e-08 au
i 2.194039129942108 3.7691e-06 deg
node 272.0206897949424 9.1942e-05 deg
peri 136.9075168818735 9.2892e-05 deg
M 300.0971566345038 1.5494e-05 deg
tp 2459629.758717853551
(2022-Feb-19.25871785)
6.1206e-05 TDB
period 1401.822245981176
3.84
7.7238e-06
2.115e-08
d
yr
n .2568085939797778 1.415e-09 deg/d
Q 2.868956154313212 1.0538e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1657  
   data-arc span      15242 days (41.73 yr)  
   first obs. used      1979-10-14  
   last obs. used      2021-07-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49143  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 09:52:38  

Additional Information
 Earth MOID = 1.04405 au 
 Jupiter MOID = 2.50538 au 
 T_jup = 3.474 
[ 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 14.57   n/a E2021B10  

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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