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187576 (2006 WK9)
Classification: Main-belt Asteroid          SPK-ID: 2187576
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1820447017159645 4.6081e-08  
a 2.240003458069762 1.0709e-08 au
q 1.832222696702723 1.0434e-07 au
i 6.278270367578691 4.939e-06 deg
node 102.6301308112028 4.9426e-05 deg
peri 141.728489461517 5.1688e-05 deg
M 253.9027589499748 1.6453e-05 deg
tp 2459561.388505660741
(2021-Dec-12.88850566)
5.7416e-05 TDB
period 1224.535725454061
3.35
8.7811e-06
2.404e-08
d
yr
n .2939889727321031 2.1082e-09 deg/d
Q 2.647784219436801 1.2658e-08 au
  Orbit Determination Parameters
   # obs. used (total)      360  
   data-arc span      8333 days (22.81 yr)  
   first obs. used      1998-04-21  
   last obs. used      2021-02-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .6061  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:55:59  

Additional Information
 Earth MOID = .821949 au 
 Jupiter MOID = 2.38286 au 
 T_jup = 3.605 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457516.5 (2016-May-08.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1821697880602789 4.6061e-08  
q 1.831775727175048 1.043e-07 au
tp 2457112.997851896858
(2015-Mar-31.49785190)
4.9447e-05 TDB
node 102.6486054772216 4.9453e-05 deg
peri 141.7671493183707 5.1715e-05 deg
i 6.276927165893266 4.9377e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      360  
   data-arc span      8333 days (22.81 yr)  
   first obs. used      1998-04-21  
   last obs. used      2021-02-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .6061  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:55:59  

Additional Information
 Jupiter MOID = 2.38286 au 
 T_jup = 3.605 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.121648646781867E-15 -4.787546513551521E-15 -3.241320573124681E-13 1.276727063118149E-14 -7.357194299662469E-14 -2.2503521794081E-15
q -4.787546513551521E-15 1.087909448718888E-14 8.6084903587685E-13 -3.047527871847759E-14 2.113566226992638E-13 5.451104722586268E-15
tp -3.241320573124681E-13 8.6084903587685E-13 2.445008513789473E-9 -2.778685048187973E-11 7.741110770220556E-10 4.470337475065282E-12
node 1.276727063118149E-14 -3.047527871847759E-14 -2.778685048187973E-11 2.445634535038739E-9 -2.438749862170672E-9 -2.0443925920376E-11
peri -7.357194299662469E-14 2.113566226992638E-13 7.741110770220556E-10 -2.438749862170672E-9 2.674484243861834E-9 2.168772452693962E-11
i -2.2503521794081E-15 5.451104722586268E-15 4.470337475065282E-12 -2.0443925920376E-11 2.168772452693962E-11 2.43807191011378E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 17.09   n/a MPCxxxxx  

187576 (2006 WK9)          Discovered 2006-Nov-16 by Spacewatch at Kitt Peak
Reference: 20080520/Numbers.arcLast Updated: 2008-05-22

[ show close-approach data ]
Alternate Designations
 2006 WK9 = 1998 HX145 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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