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338P/McNaught
Classification: Jupiter-family Comet          SPK-ID: 1002502
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2456438.5 (2013-May-26.0) TDB
Reference: JPL 47 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4112505912419175 4.3234e-07  
a 3.900031949827539 2.4481e-07 au
q 2.296141504598595 1.7569e-06 au
i 25.37380804311178 2.2809e-05 deg
node 9.85332975616058 2.9888e-05 deg
peri 4.654850786318901 0.00020516 deg
M 196.7578839242226 9.2483e-05 deg
tp 2457714.146639250291
(2016-Nov-21.64663925)
0.00071663 TDB
period 2813.200423822782
7.70
0.00026488
7.252e-07
d
yr
n .1279681308702512 1.2049e-08 deg/d
Q 5.503922395056483 3.4548e-07 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 3.746185448221743E-8 2.09E-9
A2 [EST] -1.90415313210714E-8 2.26E-9
  Orbit Determination Parameters
   # obs. used (total)      506  
   data-arc span      3187 days (8.73 yr)  
   first obs. used      2008-05-10  
   last obs. used      2017-01-30  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .89145  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 23:28:30  

Additional Information
 Earth MOID = 1.2983 au 
 Jupiter MOID = .00812851 au 
 T_jup = 2.760 
[ 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 14.9   0.9 47 2 parameter fit from 241 observations, autocmod 2.9c
comet total magnitude slope K1 4.5   n/a 47 autocmod 2.9c

[ show close-approach data ]
Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 2016.9   338P/2016 N1       
 2009.2   338P/2008 J3       
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
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