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187090 (2005 PK9)
Classification: Main-belt Asteroid          SPK-ID: 2187090
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 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07431145002907895 6.3866e-08  
a 2.513194993376441 1.3546e-08 au
q 2.326435829212816 1.6284e-07 au
i 1.422631438051929 5.4583e-06 deg
node 358.8407288162201 0.00014541 deg
peri 345.6015395662353 0.00014814 deg
M 339.3861533294281 2.7252e-05 deg
tp 2459479.828630881244
(2021-Sep-22.32863088)
0.00011033 TDB
period 1455.250327444864
3.98
1.1765e-05
3.221e-08
d
yr
n .247380119564783 2e-09 deg/d
Q 2.699954157540065 1.4552e-08 au
  Orbit Determination Parameters
   # obs. used (total)      255  
   data-arc span      7286 days (19.95 yr)  
   first obs. used      2001-08-25  
   last obs. used      2021-08-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54953  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 03:13:17  

Additional Information
 Earth MOID = 1.31782 au 
 Jupiter MOID = 2.57372 au 
 T_jup = 3.456 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457833.5 (2017-Mar-21.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07343499937903185 6.4066e-08  
q 2.327175936698058 1.6294e-07 au
tp 2458029.147339010916
(2017-Oct-02.64733901)
0.00010837 TDB
node 358.8738211146779 0.00014548 deg
peri 346.4825926745638 0.0001482 deg
i 1.422716342500664 5.4571e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      255  
   data-arc span      7286 days (19.95 yr)  
   first obs. used      2001-08-25  
   last obs. used      2021-08-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54953  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 03:13:17  

Additional Information
 Jupiter MOID = 2.57372 au 
 T_jup = 3.456 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.104399280512004E-15 -1.040858862159363E-14 2.184485700457332E-12 -7.995340903435579E-14 7.920304882191975E-13 -2.372951471854806E-16
q -1.040858862159363E-14 2.654834661303203E-14 -5.292293722190231E-12 2.005504047015633E-13 -1.952093179227967E-12 6.533763362314284E-16
tp 2.184485700457332E-12 -5.292293722190231E-12 1.174317418827798E-8 -6.814905197309092E-11 3.053353790890517E-9 -1.75440338629611E-13
node -7.995340903435579E-14 2.005504047015633E-13 -6.814905197309092E-11 2.116301981293688E-8 -2.11761810322508E-8 8.496562708120408E-11
peri 7.920304882191975E-13 -1.952093179227967E-12 3.053353790890517E-9 -2.11761810322508E-8 2.196440416016349E-8 -8.498728291662297E-11
i -2.372951471854806E-16 6.533763362314284E-16 -1.75440338629611E-13 8.496562708120408E-11 -8.498728291662297E-11 2.978029578604651E-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 17.22   n/a E2021B55  

187090 (2005 PK9)          Discovered 2005-Aug-04 by NEAT at Palomar
Reference: 20080520/Numbers.arcLast Updated: 2008-05-22

Alternate Designations
 2005 PK9 = 2004 GF66 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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