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162187 (1999 QR2)
Classification: Main-belt Asteroid          SPK-ID: 2162187
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 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2778549018858008 6.2004e-08  
a 2.557116620116711 1.4413e-08 au
q 1.846609232523631 1.6515e-07 au
i 18.78965470612967 4.4173e-06 deg
node 148.2723115962486 2.3313e-05 deg
peri 144.2471023814406 2.6407e-05 deg
M 150.5272065176236 1.4955e-05 deg
tp 2458771.993834122834
(2019-Oct-15.49383412)
5.8367e-05 TDB
period 1493.56534886242
4.09
1.2627e-05
3.457e-08
d
yr
n .2410339797145103 2.0378e-09 deg/d
Q 3.26762400770979 1.8417e-08 au
  Orbit Determination Parameters
   # obs. used (total)      273  
   data-arc span      7806 days (21.37 yr)  
   first obs. used      1999-08-31  
   last obs. used      2021-01-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .61137  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 20:08:52  

Additional Information
 Earth MOID = .85863 au 
 Jupiter MOID = 2.12284 au 
 T_jup = 3.310 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457895.5 (2017-May-22.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2779046378024022 6.1906e-08  
q 1.84603925277798 1.6488e-07 au
tp 2457279.501100531414
(2015-Sep-14.00110053)
5.0969e-05 TDB
node 148.3029764464927 2.3326e-05 deg
peri 144.2658986920542 2.6441e-05 deg
i 18.78563773414916 4.4161e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      273  
   data-arc span      7806 days (21.37 yr)  
   first obs. used      1999-08-31  
   last obs. used      2021-01-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .61137  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 20:08:52  

Additional Information
 Jupiter MOID = 2.12284 au 
 T_jup = 3.310 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.832368684249847E-15 -1.01942560551341E-14 -2.058440947373943E-12 2.36315442530441E-14 -4.990656765185996E-13 -4.561367653762259E-14
q -1.01942560551341E-14 2.718437481676405E-14 5.535824883333466E-12 -5.705591634127224E-14 1.344606286597956E-12 1.238114369464169E-13
tp -2.058440947373943E-12 5.535824883333466E-12 2.597845228947892E-9 -2.532724510900133E-11 7.176313552149429E-10 4.186618538710901E-11
node 2.36315442530441E-14 -5.705591634127224E-14 -2.532724510900133E-11 5.441135006870278E-10 -5.199530959300633E-10 -8.703895569568144E-12
peri -4.990656765185996E-13 1.344606286597956E-12 7.176313552149429E-10 -5.199530959300633E-10 6.991143032562978E-10 1.911914161973288E-11
i -4.561367653762259E-14 1.238114369464169E-13 4.186618538710901E-11 -8.703895569568144E-12 1.911914161973288E-11 1.950150209847198E-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 16.70   n/a MPCxxxxx  

162187 (1999 QR2)          Discovered 1999-Aug-31 by Sarounova, L. at Ondrejov
Reference: 20070926/Numbers.arcLast Updated: 2007-09-30

Alternate Designations
 1999 QR2 = 2003 QB6 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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