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JPL Small-Body Database Browser
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249P/LINEAR
Classification: Jupiter-family Comet [NEO]          SPK-ID: 1002424
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | 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.


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Orbital Elements at Epoch 2454680.5 (2008-Aug-02.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .8162815540433769 1.3747e-07  
a 2.777695507129093 7.9303e-08 au
q .5103139019104512 3.8491e-07 au
i 8.430361613139395 2.5376e-05 deg
node 240.6150821048346 4.6714e-05 deg
peri 64.07634009194108 6.3336e-05 deg
M 149.9471749609254 8.1775e-06 deg
tp 2453976.194356088607
(2006-Aug-28.69435609)
2.9983e-05 TDB
period 1690.929034669535
4.63
7.2413e-05
1.983e-07
d
yr
n .2129007147070227 9.1174e-09 deg/d
Q 5.045077112347736 1.4404e-07 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 8.349943744464145E-11 1.436E-10
A2 [EST] -1.585083235613371E-12 4.643E-13
  Orbit Determination Parameters
   # obs. used (total)      511  
   data-arc span      4899 days (13.41 yr)  
   first obs. used      2006-10-19  
   last obs. used      2020-03-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50949  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Mar-19 18:45:45  

Additional Information
 Earth MOID = .0522934 au 
 Jupiter MOID = .74582 au 
 T_jup = 2.708 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 17.7   01. 27 2 parameter fit from 182 observations, autocmod 2.8
comet total magnitude slope K1 4.5   n/a 27 autocmod 2.8

[ show close-approach data ]
Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 2011.3   249P/2011 A4       
 2006.7   249P/2006 U1       
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
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