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JPL Small-Body Database Browser
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193844 (2001 QR81)
Classification: Main-belt Asteroid          SPK-ID: 2193844
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 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .250564872017621 6.3337e-08  
a 2.334847573408316 1.239e-08 au
q 1.749816789996608 1.5317e-07 au
i 6.940958195456194 5.1549e-06 deg
node 223.3582789745332 4.883e-05 deg
peri 144.3468623742654 5.0781e-05 deg
M 338.1731131324737 1.905e-05 deg
tp 2458679.508810605020
(2019-Jul-15.00881060)
6.9496e-05 TDB
period 1303.125452128699
3.57
1.0372e-05
2.84e-08
d
yr
n .2762588969557214 2.1989e-09 deg/d
Q 2.919878356820024 1.5494e-08 au
  Orbit Determination Parameters
   # obs. used (total)      372  
   data-arc span      8520 days (23.33 yr)  
   first obs. used      1995-01-20  
   last obs. used      2018-05-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53843  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-May-31 16:38:08  

Additional Information
 Earth MOID = .754175 au 
 Jupiter MOID = 2.56514 au 
 T_jup = 3.516 
[ 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 16.4   n/a MPO449957  

193844 (2001 QR81)          Discovered 2001-Aug-17 by LINEAR at Socorro
Reference: 20081113/Numbers.arcLast Updated: 2008-11-17
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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