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257346 (2009 KA3)
Classification: Main-belt Asteroid          SPK-ID: 2257346
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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1558309295961118 3.9468e-08  
a 2.399974898908371 1.384e-08 au
q 2.025984579404145 9.7306e-08 au
i 3.876604469909896 4.0667e-06 deg
node 78.50554278826787 7.2358e-05 deg
peri 137.4688922536795 7.4231e-05 deg
M 4.284142122194177 1.4656e-05 deg
tp 2458984.338939911010
(2020-May-14.83893991)
5.53e-05 TDB
period 1358.027223675891
3.72
1.1747e-05
3.216e-08
d
yr
n .2650904147750121 2.2931e-09 deg/d
Q 2.773965218412597 1.5997e-08 au
  Orbit Determination Parameters
   # obs. used (total)      280  
   data-arc span      6467 days (17.71 yr)  
   first obs. used      2002-08-13  
   last obs. used      2020-04-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58758  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-21 14:34:02  

Additional Information
 Earth MOID = 1.02081 au 
 Jupiter MOID = 2.1962 au 
 T_jup = 3.507 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457574.5 (2016-Jul-05.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1563562734840869 3.9443e-08  
q 2.02513129252362 9.7326e-08 au
tp 2457625.120714845859
(2016-Aug-24.62071485)
5.7395e-05 TDB
node 78.51608645016849 7.237e-05 deg
peri 137.219627901632 7.423e-05 deg
i 3.876426743327478 4.0662e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      280  
   data-arc span      6467 days (17.71 yr)  
   first obs. used      2002-08-13  
   last obs. used      2020-04-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58758  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-21 14:34:02  

Additional Information
 Jupiter MOID = 2.1962 au 
 T_jup = 3.507 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.555717788950698E-15 -3.811855390725446E-15 -1.717200337240475E-13 -2.354748413425384E-14 -4.37840144204057E-15 -2.553260810993632E-15
q -3.811855390725446E-15 9.472443434806566E-15 2.176010617340307E-13 5.74498231183203E-14 -4.907626641218756E-14 6.233014088627077E-15
tp -1.717200337240475E-13 2.176010617340307E-13 3.294151980815743E-9 9.558345403966535E-12 9.706910141091223E-10 1.934820326148187E-12
node -2.354748413425384E-14 5.74498231183203E-14 9.558345403966535E-12 5.237375773431248E-9 -5.222559744781091E-9 2.027158345911322E-12
peri -4.37840144204057E-15 -4.907626641218756E-14 9.706910141091223E-10 -5.222559744781091E-9 5.510021504661365E-9 -1.448804923334007E-12
i -2.553260810993632E-15 6.233014088627077E-15 1.934820326148187E-12 2.027158345911322E-12 -1.448804923334007E-12 1.653362441716203E-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 17.1   n/a MPO418369  

257346 (2009 KA3)          Discovered 2009-May-20 by Lowe, A. at Mayhill
Reference: 20101128/Numbers.arcLast Updated: 2010-12-06
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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