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291P/NEAT
Classification: Jupiter-family Comet          SPK-ID: 1000453
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2454665.5 (2008-Jul-18.0) TDB
Reference: JPL 56 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4286430750700019 3.2477e-07  
a 4.559094493906344 1.9055e-07 au
q 2.604870210503615 1.3842e-06 au
i 5.947114846128064 1.9152e-05 deg
node 241.0127663326594 0.00012507 deg
peri 175.9569171618763 0.00025796 deg
M 159.5367979216103 9.484e-05 deg
tp 2453089.795817967691
(2004-Mar-25.29581797)
0.0010272 TDB
period 3555.627998816647
9.73
0.00022292
6.103e-07
d
yr
n .1012479371069786 6.3477e-09 deg/d
Q 6.513318777309074 2.7223e-07 au
  Orbit Determination Parameters
   # obs. used (total)      668  
   data-arc span      3859 days (10.57 yr)  
   first obs. used      2003-07-29  
   last obs. used      2014-02-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   norm. resid. RMS      .7983  
   source      ORB  
   producer      Otto Matic  
   solution date      2014-Aug-13 13:59:41  

Additional Information
 Earth MOID = 1.61784 au 
 T_jup = 2.824 
[ 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 5.5   0.7 56 2 parameter fit from 349 observations, autocmod 2.5c
comet total magnitude slope K1 25.   n/a 56 autocmod 2.5c
comet nuclear magnitude M2 14.7   0.7 56 from 236 observations, autocmod 2.5c
comet nuclear magnitude slope K2 5.   n/a 56 autocmod 2.5c
comet nuclear phase coefficient PC 0.03   n/a 56 autocmod 2.5c

[ show close-approach data ]
Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 2014.0   291P/2013 N2       
 2004.2   291P/2003 S1       
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
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