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9501 Ywain (2071 T-2)
Classification: Main-belt Asteroid          SPK-ID: 2009501
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 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2649738408500424 3.2618e-08  
a 2.592111413138381 8.2532e-09 au
q 1.905269696087873 8.2132e-08 au
i 3.067565913564154 4.7935e-06 deg
node 212.9597547653717 6.0533e-05 deg
peri 116.2904764217626 6.1272e-05 deg
M 91.6904894212621 1.0374e-05 deg
tp 2458612.259611034329
(2019-May-08.75961103)
4.2984e-05 TDB
period 1524.329741392252
4.17
7.2801e-06
1.993e-08
d
yr
n .2361693734789906 1.1279e-09 deg/d
Q 3.278953130188889 1.044e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1207  
   data-arc span      17197 days (47.08 yr)  
   first obs. used      1973-09-19  
   last obs. used      2020-10-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52417  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 03:13:13  

Additional Information
 Earth MOID = .896749 au 
 Jupiter MOID = 2.10519 au 
 T_jup = 3.367 
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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 14.9   n/a MPO431610  
diameter diameter 5.756 km 0.074 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.070   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

9501 Ywain           Discovered 1973 Sept. 29 by C. J. van Houten and I. van Houten-Groeneveld on Palomar Schmidt plates taken by T. Gehrels.
Ywain was a knight of the Round Table of King Arthur.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20001111/MPCPages.arcLast Updated: 2013-03-29

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Alternate Designations
 2071 T-2 = 1994 VH3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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