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21227 (1995 QS)
Classification: Main-belt Asteroid          SPK-ID: 2021227
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1584546934037947 5.2032e-08  
a 2.24990476823869 1.3157e-08 au
q 1.893396797999693 1.1557e-07 au
i 5.174938376861729 5.8278e-06 deg
node 59.05587490937707 6.8072e-05 deg
peri 214.1119867110995 7.1199e-05 deg
M 113.4584027421328 2.5397e-05 deg
tp 2457212.010938061863
(2015-Jul-08.51093806)
8.5539e-05 JED
period 1232.663768549544
3.37
1.0813e-05
2.96e-08
d
yr
n .2920504432637023 2.5618e-09 deg/d
Q 2.606412738477687 1.5242e-08 au
  Orbit Determination Parameters
   # obs. used (total)      988  
   data-arc span      7382 days (20.21 yr)  
   first obs. used      1995-08-16  
   last obs. used      2015-11-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53295  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Feb-25 19:32:09  

Additional Information
 Earth MOID = .879674 au 
 Jupiter MOID = 2.48783 au 
 T_jup = 3.606 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.5 mag n/a MPO290624  

21227 (1995 QS)          Discovered 1995-Aug-16 by Shimizu, Y., Urata, T. at Nachi-Katsuura
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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