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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 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .374392024946453 4.5345e-07  
a 4.040395456376404 1.0058e-07 au
q 2.527703619879194 1.8648e-06 au
i 4.41401381118131 4.8015e-05 deg
node 36.39911634669623 0.00015247 deg
peri 310.6453893603847 0.00017062 deg
M 99.80255728375961 1.7073e-05 deg
tp 2454600.118358558500
(2008-May-13.61835856)
0.00014954 TDB
period 2966.430910955385
8.12
0.00011077
3.033e-07
d
yr
n .1213579587073735 4.5315e-09 deg/d
Q 5.553087292873613 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.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .81275  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 23:27:55  

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 26 2 parameter fit from 98 observations, autocmod 2.9c
comet total magnitude slope K1 4.5   n/a 26 autocmod 2.9c

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1945-Nov-11 20:21 05:58 Jupiter 0.2717411199734 0.271563321347376 0.271920026895646 3.43779459077549 2.36313173754374 2431771.347812503 358.457880925962 35257.8989342802 77.1275412465231 -75.1045587644814 845920.370080866 T 26 CATAB v2.0g-lin.ifort 2021-Apr-15 23:27:56 2021-Apr-15 23:27
2004-Jul-09 03:18 00:20 Jupiter 0.184987858348734 0.184981498792789 0.184994218076848 3.846517854157 2.37446803803502 2453195.637342451 20.3996004625254 719.604016607298 243.5212864549 -73.5517083968177 130266.578854066 T 26 CATAB v2.0g-lin.ifort 2021-Apr-15 23:27:56 2021-Apr-15 23:27
2027-Mar-05 06:33 00:06 Jupiter 1.18873661938729 1.18872961755881 1.18874362122104 5.93313221897981 5.81179642842121 2461469.773107737 5.50893643391405 717.52677687368 332.015554189638 -83.7302687605863 329401.756035068 T 26 CATAB v2.0g-lin.ifort 2021-Apr-15 23:27:56 2021-Apr-15 23:27
2032-Feb-17 19:04 00:04 Jupiter 1.98058499457682 1.98057444614476 1.98059554302047 4.7241676826831 4.63275670713739 2463280.294111659 3.90557560338458 618.415230061717 273.244093517318 -44.6845340063864 270417.210882597 T 26 CATAB v2.0g-lin.ifort 2021-Apr-15 23:27:56 2021-Apr-15 23:27
2059-Oct-06 19:54 00:23 Jupiter 1.81629366339642 1.81627444326788 1.81631288348925 4.52405470342034 4.41977121683009 2473373.329055847 22.5677995762824 872.192613848548 178.375800411358 -12.4832204515082 130562.609347567 T 26 CATAB v2.0g-lin.ifort 2021-Apr-15 23:27:56 2021-Apr-15 23:27
2064-Jun-12 01:49 00:03 Jupiter 0.712423150361248 0.712390015844099 0.71245628477181 5.06315790291002 4.82262422615477 2475083.575663340 3.10598074741128 1589.16153116796 120.387652974781 -4.21249481054196 61079.2344277871 T 26 CATAB v2.0g-lin.ifort 2021-Apr-15 23:27:56 2021-Apr-15 23:27
2087-Dec-14 11:51 00:27 Jupiter 1.75823110926836 1.75797806447961 1.75848415337729 7.80312314557624 7.74113924969164 2483668.993989970 26.9748670106101 12498.6381029843 113.132070014126 -1.33002793283332 31206.6109898606 T 26 CATAB v2.0g-lin.ifort 2021-Apr-15 23:27:56 2021-Apr-15 23:27
2146-Feb-01 08:52 00:06 Jupiter 0.783776557275098 0.783732719444607 0.783820395012653 4.96410287919572 4.74140587591509 2504901.869629425 5.90439676608736 2141.84364564413 583.377715033686 -10.7445965483808 48694.9245889211 T 26 CATAB v2.0g-lin.ifort 2021-Apr-15 23:27:56 2021-Apr-15 23:27
2150-May-18 17:50 00:13 Jupiter 1.85746390319157 1.85744688947015 1.85748091689408 3.53895630779516 3.40766655079558 2506469.243242231 12.7161809836757 841.877809489853 374.727613280635 -42.8702388762717 156077.416142611 T 26 CATAB v2.0g-lin.ifort 2021-Apr-15 23:27:56 2021-Apr-15 23:27

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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