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208P/McMillan
Classification: Jupiter-family Comet          SPK-ID: 1003003
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2455422.5 (2010-Aug-14.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3743919992127805 4.5345e-07  
a 4.040395461059054 1.0058e-07 au
q 2.527703726782911 1.8648e-06 au
i 4.414014003685712 4.8015e-05 deg
node 36.39911627672726 0.00015247 deg
peri 310.6453874840687 0.00017062 deg
M 99.80255950059387 1.7073e-05 deg
tp 2454600.118338861936
(2008-May-13.61833886)
0.00014954 TDB
period 2966.430916112341
8.12
0.00011077
3.033e-07
d
yr
n .1213579584964003 4.5315e-09 deg/d
Q 5.553087195335197 1.3823e-07 au
  Orbit Determination Parameters
   # obs. used (total)      220  
   data-arc span      5944 days (16.27 yr)  
   first obs. used      2000-09-23  
   last obs. used      2017-01-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .81289  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Oct-18 17:46:44  

Additional Information
 Earth MOID = 1.52342 au 
 Jupiter MOID = .11315 au 
 T_jup = 2.917 
[ 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 16.1   0.8 25 2 parameter fit from 98 observations, autocmod 2.8
comet total magnitude slope K1 4.5   n/a 25 autocmod 2.8

[ show close-approach data ]
Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 2008.4   208P/2008 U1       
 2000.2   208P/2000 S7       
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
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