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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 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1776943620894414 3.6595e-08  
a 3.04461170337306 1.8043e-08 au
q 2.503601368932137 1.1699e-07 au
i 13.3060229954061 4.7951e-06 deg
node 125.1142861045433 1.6594e-05 deg
peri 271.0875992718739 2.1605e-05 deg
M 295.4195378902832 1.3984e-05 deg
tp 2459348.592722040771
(2021-May-14.09272204)
7.6158e-05 TDB
period 1940.422472074923
5.31
1.7249e-05
4.723e-08
d
yr
n .1855266083447522 1.6492e-09 deg/d
Q 3.585622037813984 2.1249e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1061  
   data-arc span      9515 days (26.05 yr)  
   first obs. used      1994-10-04  
   last obs. used      2020-10-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52621  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:02:30  

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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