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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1581991668751888 5.2992e-08  
a 2.249677581945137 1.398e-08 AU
q 1.893780462743627 1.1727e-07 AU
i 5.174895863458712 5.9497e-06 deg
node 59.06261171062245 6.8906e-05 deg
peri 214.1204159374155 7.2361e-05 deg
M 298.2170888770501 2.7083e-05 deg
tp 2457212.016725623583
(2015-Jul-08.51672562)
9.3655e-05 JED
period 1232.47706915197
3.37
1.1488e-05
3.145e-08
d
yr
n .2920946839584651 2.7226e-09 deg/d
Q 2.605574701146646 1.6191e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      955  
   data-arc span      6793 days (18.60 yr)  
   first obs. used      1995-08-16  
   last obs. used      2014-03-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .54017  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-09 22:56:22  

Additional Information
 Earth MOID = .8817 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 (905)
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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