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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 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1581991637265907 5.2141e-08  
a 2.249677580750757 1.3534e-08 AU
q 1.893780468821527 1.1582e-07 AU
i 5.174895878710164 5.9397e-06 deg
node 59.06261123331503 6.8313e-05 deg
peri 214.12041461429 7.1637e-05 deg
M 298.2170915083831 2.5999e-05 deg
tp 2457212.016716446645
(2015-Jul-08.51671645)
8.9838e-05 JED
period 1232.477068170466
3.37
1.1122e-05
3.045e-08
d
yr
n .2920946841910798 2.6358e-09 deg/d
Q 2.605574692679987 1.5675e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      972  
   data-arc span      7239 days (19.82 yr)  
   first obs. used      1995-08-16  
   last obs. used      2015-06-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53697  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jul-06 12:28:39  

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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