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JPL Small-Body Database Browser
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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1675631024982313 1.0037e-07  
a 2.673628580234654 7.9726e-08 au
q 2.225627080402594 3.1089e-07 au
i 4.843720475061129 1.3263e-05 deg
node 291.4382002221425 0.00012101 deg
peri 112.6968134781503 0.00014221 deg
M 230.4872457112634 8.8216e-05 deg
tp 2459174.960375919720
(2020-Nov-21.46037592)
0.00041365 TDB
period 1596.798218575795
4.37
7.1423e-05
1.955e-07
d
yr
n .225451153321732 1.0084e-08 deg/d
Q 3.121630080066714 9.3085e-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 = 1.23975 au 
 Jupiter MOID = 2.28869 au 
 T_jup = 3.354 
[ 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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