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231P/LINEAR-NEAT
Classification: Jupiter-family Comet          SPK-ID: 1000427
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2456063.5 (2012-May-16.0) TDB
Reference: JPL 52 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .246816248172099 2.6324e-07  
a 4.026097537396293 1.7079e-07 au
q 3.032391248441213 1.15e-06 au
i 12.32562024090642 1.7724e-05 deg
node 133.0822921177211 5.9376e-05 deg
peri 42.43114323489593 0.00014239 deg
M 44.59810718499909 7.76e-05 deg
tp 2455697.956731221006
(2011-May-16.45673122)
0.00062514 TDB
period 2950.698697022303
8.08
0.00018776
5.141e-07
d
yr
n .1220050018537284 7.7635e-09 deg/d
Q 5.019803826351373 2.1295e-07 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 1.579887204155041E-7 8.782E-9
A2 [EST] -7.721278197687189E-9 2.69E-10
  Orbit Determination Parameters
   # obs. used (total)      573  
   data-arc span      25635 days (70.18 yr)  
   first obs. used      1950-04-20  
   last obs. used      2020-06-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .7882  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jul-01 23:45:37  

Additional Information
 Earth MOID = 2.05286 au 
 Jupiter MOID = .264531 au 
 T_jup = 2.958 
[ 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 7.2   0.6 52 from 327 observations, assumed slope, autocmod 2.8
comet total magnitude slope K1 20.   n/a 52 autocmod 2.8
comet nuclear magnitude M2 14.8   0.7 52 from 153 observations, autocmod 2.8
comet nuclear magnitude slope K2 5.   n/a 52 autocmod 2.8
comet nuclear phase coefficient PC 0.03   n/a 52 autocmod 2.8

[ show close-approach data ]
Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 2011.4   231P/2009 X1       
 2003.3   231P/2003 CP7       
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
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