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JPL Small-Body Database Browser
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20496 Jenik (1999 QA2)
Classification: Main-belt Asteroid          SPK-ID: 2020496
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1776943248025861 4.1103e-08  
a 3.044611724647654 2.3078e-08 au
q 2.503601499950352 1.2542e-07 au
i 13.30602662773005 4.9808e-06 deg
node 125.1142921403556 2.0396e-05 deg
peri 271.0875947568526 2.4762e-05 deg
M 295.4195261448217 1.6141e-05 deg
tp 2459348.592788998053
(2021-May-14.09278900)
8.8914e-05 TDB
period 1940.422492413329
5.31
2.2063e-05
6.041e-08
d
yr
n .1855266064001677 2.1095e-09 deg/d
Q 3.585621949344956 2.7179e-08 au
  Orbit Determination Parameters
   # obs. used (total)      850  
   data-arc span      9085 days (24.87 yr)  
   first obs. used      1994-10-04  
   last obs. used      2019-08-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56324  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 01:29:57  

Additional Information
 Earth MOID = 1.55418 au 
 Jupiter MOID = 2.01934 au 
 T_jup = 3.174 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.2   n/a MPO358826  
diameter diameter 5.298 km 0.916 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.144   0.045 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

20496 Jeník           Discovered 1999 Aug. 22 by L. Šarounová at Ondřejov.
Jeník is the nickname of the main tenor character in Smetana's The Bartered Bride.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20040928/MPCPages.arcLast Updated: 2004-09-28

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Alternate Designations
 1999 QA2 = 1997 EH30 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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