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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .158199164902477 5.2228e-08  
a 2.249677581284352 1.3624e-08 AU
q 1.893780466625343 1.1595e-07 AU
i 5.174895889606663 5.9414e-06 deg
node 59.06261212322467 6.8442e-05 deg
peri 214.1204145482521 7.18e-05 deg
M 298.2170903277182 2.6252e-05 deg
tp 2457212.016720563961
(2015-Jul-08.51672056)
9.0726e-05 JED
period 1232.477068608957
3.37
1.1196e-05
3.065e-08
d
yr
n .292094684087158 2.6533e-09 deg/d
Q 2.605574695943361 1.5779e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      959  
   data-arc span      7103 days (19.45 yr)  
   first obs. used      1995-08-16  
   last obs. used      2015-01-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53907  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Feb-04 13:58:59  

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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