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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 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1581991638382531 5.2176e-08  
a 2.249677580823229 1.3589e-08 AU
q 1.89378046863133 1.1586e-07 AU
i 5.174895880923923 5.9412e-06 deg
node 59.06261116704442 6.8383e-05 deg
peri 214.1204148003646 7.1731e-05 deg
M 298.2170913380554 2.6158e-05 deg
tp 2457212.016717039991
(2015-Jul-08.51671704)
9.0398e-05 JED
period 1232.477068230021
3.37
1.1167e-05
3.057e-08
d
yr
n .2920946841769653 2.6465e-09 deg/d
Q 2.605574693015128 1.5739e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      968  
   data-arc span      7140 days (19.55 yr)  
   first obs. used      1995-08-16  
   last obs. used      2015-03-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53807  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Apr-07 17:08:36  

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
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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