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442275 (2011 QR91)
Classification: Main-belt Asteroid          SPK-ID: 2442275
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1674534932846475 9.9797e-08  
a 2.670420387175044 7.8061e-08 au
q 2.223249164804042 3.0792e-07 au
i 4.847907658281178 1.328e-05 deg
node 291.4261074607576 0.00012089 deg
peri 113.1469629155357 0.00014237 deg
M 320.2719514112683 9.2221e-05 deg
tp 2459176.398692759135
(2020-Nov-22.89869276)
0.00041504 TDB
period 1593.924988584747
4.36
6.9889e-05
1.913e-07
d
yr
n .2258575545136823 9.9033e-09 deg/d
Q 3.117591609546045 9.1132e-08 au
  Orbit Determination Parameters
   # obs. used (total)      57  
   data-arc span      4722 days (12.93 yr)  
   first obs. used      2003-12-28  
   last obs. used      2016-12-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60082  
   source      ORB  
   producer      Otto Matic  
   solution date      2017-Apr-09 12:30:14  

Additional Information
 Earth MOID = 1.23799 au 
 Jupiter MOID = 2.29131 au 
 T_jup = 3.356 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 17.6   n/a MPO349187  

442275 (2011 QR91)          Discovered 2007-Oct-09 by Spacewatch at Kitt Peak
Reference: Last Updated: 2015-09-02

Alternate Designations
 2011 QR91 = 2007 VA261 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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