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21290 Vydra (1996 VR1)
Classification: Main-belt Asteroid          SPK-ID: 2021290
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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05349966806651931 4.6953e-08  
a 2.672314262443259 1.6676e-08 au
q 2.529346336433119 1.2319e-07 au
i 15.3605753124349 6.2791e-06 deg
node 58.29667344337412 1.8859e-05 deg
peri 273.8888808549387 6.6084e-05 deg
M 246.5502211731301 6.6145e-05 deg
tp 2459703.341222993630
(2022-May-03.84122299)
0.00029428 TDB
period 1595.620918344466
4.37
1.4935e-05
4.089e-08
d
yr
n .2256174984052713 2.1118e-09 deg/d
Q 2.815282188453399 1.7568e-08 au
  Orbit Determination Parameters
   # obs. used (total)      751  
   data-arc span      8595 days (23.53 yr)  
   first obs. used      1996-11-05  
   last obs. used      2020-05-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55919  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 01:57:52  

Additional Information
 Earth MOID = 1.57556 au 
 Jupiter MOID = 2.36516 au 
 T_jup = 3.327 
[ 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 15.05   n/a E2021B10  

21290 Vydra           Discovered 1996 Nov. 9 by M. Tichy and Z. Moravec at Klet.
The Vydra river, headstream of the Otava river, is the wild Šumava mountain river with a stony bed that runs through the Povydří reserve (Vydra Valley).
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20030910/MPCPages.arcLast Updated: 2003-10-02
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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