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91431 (1999 RQ)
Classification: Main-belt Asteroid          SPK-ID: 2091431
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09680438261799114 5.3256e-08  
a 2.772382365102843 1.9623e-08 au
q 2.504003601868056 1.4684e-07 au
i 4.547961017131263 5.2151e-06 deg
node 90.43609497028082 7.093e-05 deg
peri 250.8046909378209 7.713e-05 deg
M 221.9662362874826 3.3692e-05 deg
tp 2459846.988713785629
(2022-Sep-24.48871379)
0.00016006 TDB
period 1686.079772826778
4.62
1.7901e-05
4.901e-08
d
yr
n .2135130293369489 2.2669e-09 deg/d
Q 3.040761128337631 2.1522e-08 au
  Orbit Determination Parameters
   # obs. used (total)      471  
   data-arc span      10638 days (29.13 yr)  
   first obs. used      1992-01-29  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .57618  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 14:45:47  

Additional Information
 Earth MOID = 1.49811 au 
 Jupiter MOID = 2.29868 au 
 T_jup = 3.325 
[ 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 15.77   n/a E2021B10  

91431 (1999 RQ)          Discovered 1999-Sep-03 by Sarounova, L. at Ondrejov
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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