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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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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1773188290100937 3.6309e-08  
a 3.042237077328728 1.7573e-08 au
q 2.502791161205708 1.1623e-07 au
i 13.30759345685518 4.6103e-06 deg
node 125.1167297592113 1.6289e-05 deg
peri 271.2754035593446 2.1103e-05 deg
M 332.3567111828571 1.367e-05 deg
tp 2459349.324769947093
(2021-May-14.82476995)
7.3921e-05 TDB
period 1938.152784039495
5.31
1.6794e-05
4.598e-08
d
yr
n .185743870640419 1.6094e-09 deg/d
Q 3.581682993451747 2.0689e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1108  
   data-arc span      9598 days (26.28 yr)  
   first obs. used      1994-10-04  
   last obs. used      2021-01-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52778  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:22:29  

Additional Information
 Earth MOID = 1.55243 au 
 Jupiter MOID = 2.02148 au 
 T_jup = 3.175 
[ 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 14.18   n/a E2021B10  
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

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