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20497 Marenka (1999 RS)
Classification: Main-belt Asteroid          SPK-ID: 2020497
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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05342009405253904 3.6358e-08  
a 3.18245685564243 2.1467e-08 au
q 3.012449711095864 1.1564e-07 au
i 9.735607614052443 4.3314e-06 deg
node 161.7153547108423 2.4498e-05 deg
peri 282.2109838724567 4.9505e-05 deg
M 212.1634300685267 4.4806e-05 deg
tp 2460052.072426392279
(2023-Apr-17.57242639)
0.00026099 TDB
period 2073.682267136765
5.68
2.0982e-05
5.745e-08
d
yr
n .1736042236099505 1.7565e-09 deg/d
Q 3.352464000188996 2.2614e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1328  
   data-arc span      12018 days (32.90 yr)  
   first obs. used      1987-09-18  
   last obs. used      2020-08-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50852  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:22:30  

Additional Information
 Earth MOID = 2.0482 au 
 Jupiter MOID = 1.77799 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 13.68   n/a E2021B10  

20497 Mařenka           Discovered 1999 Sept. 4 by L. Šarounová at Ondřejov.
Mařenka is the nickname of the main soprano character in Smetana's The Bartered Bride. Jeníček (Jeník) and Mařenka are also known as the main characters in the Czech version of the fairy tale Hansel and Gretel.
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 ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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