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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09696178714767131 4.274e-08  
a 2.771933573414207 1.7168e-08 au
q 2.503161940281334 1.2341e-07 au
i 4.548074924663497 4.6919e-06 deg
node 90.43408145469517 6.399e-05 deg
peri 250.8716961490098 7.0647e-05 deg
M 263.7634132641862 3.3026e-05 deg
tp 2459847.119898439041
(2022-Sep-24.61989844)
0.00015578 TDB
period 1685.670376936639
4.62
1.566e-05
4.287e-08
d
yr
n .213564884882314 1.9841e-09 deg/d
Q 3.040705206547079 1.8832e-08 au
  Orbit Determination Parameters
   # obs. used (total)      528  
   data-arc span      10726 days (29.37 yr)  
   first obs. used      1992-01-29  
   last obs. used      2021-06-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55283  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 23:40:34  

Additional Information
 Earth MOID = 1.49836 au 
 Jupiter MOID = 2.29836 au 
 T_jup = 3.325 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457582.5 (2016-Jul-13.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09557626706213061 4.2639e-08  
q 2.508755190151104 1.2288e-07 au
tp 2458159.063948474279
(2018-Feb-09.56394847)
0.00015433 TDB
node 90.45683577193998 6.3991e-05 deg
peri 250.4573506132366 7.0838e-05 deg
i 4.547145215066071 4.6904e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      528  
   data-arc span      10726 days (29.37 yr)  
   first obs. used      1992-01-29  
   last obs. used      2021-06-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55283  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 23:40:34  

Additional Information
 Jupiter MOID = 2.29836 au 
 T_jup = 3.325 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.818055812339572E-15 -5.20006069760671E-15 1.527738638081699E-12 1.278575339222823E-15 3.278699629582428E-13 2.169203545678506E-16
q -5.20006069760671E-15 1.509918493005845E-14 -3.77092448568284E-12 -2.969925671181303E-15 -8.363695232702669E-13 -3.672487427555399E-16
tp 1.527738638081699E-12 -3.77092448568284E-12 2.381897877187934E-8 7.088671761767965E-11 4.72286334384278E-9 1.41473626337348E-13
node 1.278575339222823E-15 -2.969925671181303E-15 7.088671761767965E-11 4.094834944844556E-9 -4.067428456916861E-9 -7.687115931227852E-11
peri 3.278699629582428E-13 -8.363695232702669E-13 4.72286334384278E-9 -4.067428456916861E-9 5.017960539710111E-9 7.66814927123788E-11
i 2.169203545678506E-16 -3.672487427555399E-16 1.41473626337348E-13 -7.687115931227852E-11 7.66814927123788E-11 2.200001666637372E-11

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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