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251P/LINEAR
Classification: Jupiter-family Comet          SPK-ID: 1000495
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2453813.5 (2006-Mar-19.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5097838091900158 4.5103e-07  
a 3.491387520746516 5.9051e-07 au
q 1.711534691061872 1.4842e-06 au
i 23.5097808150622 3.3681e-05 deg
node 219.5544197659631 2.6616e-05 deg
peri 30.87913279279607 0.00025658 deg
M 96.41549159793094 8.6948e-05 deg
tp 2453175.324938388360
(2004-Jun-18.82493839)
0.00046861 TDB
period 2382.843445307088
6.52
0.00060453
1.655e-06
d
yr
n .151080005154768 3.8329e-08 deg/d
Q 5.27124035043116 8.9155e-07 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 5.157078889980294E-9 4.806E-10
A2 [EST] 2.239543052419328E-10 1.864E-11
  Orbit Determination Parameters
   # obs. used (total)      401  
   data-arc span      4905 days (13.43 yr)  
   first obs. used      2004-04-17  
   last obs. used      2017-09-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      1  
   norm. resid. RMS      .67964  
   source      ORB  
   producer      Otto Matic  
   solution date      2017-Oct-03 10:47:43  

Additional Information
 Earth MOID = .732911 au 
 Jupiter MOID = .210227 au 
 T_jup = 2.783 
[ 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 9.6   1. 32 2 parameter fit from 167 observations, autocmod 2.6i
comet total magnitude slope K1 34.   n/a 32 autocmod 2.6i
comet nuclear magnitude M2 17.1   0.9 32 from 134 observations, autocmod 2.6i
comet nuclear magnitude slope K2 5.   n/a 32 autocmod 2.6i
comet nuclear phase coefficient PC 0.03   n/a 32 autocmod 2.6i

[ 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
1917-May-06 09:42 00:08 Jupiter 0.170989963144904 0.170769583006378 0.171212789751586 7.5214556208755 6.83117977052437 2421354.904079799 7.64289418619792 37854.4023369094 3861.65142560132 -73.5833678046868 6706.56608301942 T 32 CATAB v2.0e-lin.ifort 2017-Nov-30 18:49:21 2017-Nov-30 18:49
1953-Jul-08 15:58 00:24 Jupiter 1.60130354027189 1.60094827107654 1.60165909561821 7.08900053124627 7.01398690368171 2434567.165260691 24.293935803654 38519.9247503489 2195.37909940233 63.2066165487815 81691.021118494 T 32 CATAB v2.0e-lin.ifort 2017-Nov-30 18:49:21 2017-Nov-30 18:49
2000-May-09 13:21 00:05 Jupiter 0.415998472029844 0.415910164307221 0.416086780069806 6.78828582699156 6.48140307941756 2451674.055908603 4.50952980460156 4443.82324071827 543.398602071097 -4.10088326210753 17450.9614376277 T 32 CATAB v2.0e-lin.ifort 2017-Nov-30 18:49:21 2017-Nov-30 18:49
2059-Nov-27 15:07 00:50 Jupiter 0.961185211630589 0.96070344038189 0.96166724672468 6.39795486385756 6.25870370897802 2473425.129565690 50.4036304806375 35097.1819922021 2935.05909046267 47.0988613294614 40714.7704814615 T 32 CATAB v2.0e-lin.ifort 2017-Nov-30 18:49:21 2017-Nov-30 18:49
2071-Jul-10 15:49 00:22 Jupiter 1.07058351172148 1.06991461692878 1.07125242716778 9.62435403602938 9.54179405952915 2477668.159306714 22.4401805402126 34217.24788315 6495.95042146219 14.5808490275337 5462.82694178162 T 32 CATAB v2.0e-lin.ifort 2017-Nov-30 18:49:21 2017-Nov-30 18:49
2119-Oct-27 04:08 00:21 Jupiter 1.67701035663429 1.67693397497208 1.67708683445608 7.67769388578162 7.61162437591566 2495307.672122614 20.7734021484822 29801.0630512409 2741.71370535473 85.5812952483608 44373.1623895718 T 32 CATAB v2.0e-lin.ifort 2017-Nov-30 18:49:21 2017-Nov-30 18:49
2130-Sep-15 06:11 00:41 Jupiter 0.28306613242781 0.282506032269424 0.283626977397143 7.68673633929858 7.28706314035757 2499283.757749522 40.5038068211171 36731.826247931 4439.54302756373 41.5971368499167 5763.05362853912 T 32 CATAB v2.0e-lin.ifort 2017-Nov-30 18:49:21 2017-Nov-30 18:49
2167-Jul-22 00:24 04:53 Jupiter 1.46718418787999 1.46629233600852 1.46809055695563 6.62298122702751 6.53523198097922 2512742.516778797 292.80021375787 258474.982772515 18599.0950108174 81.646282403729 12611.3088176982 T 32 CATAB v2.0e-lin.ifort 2017-Nov-30 18:49:21 2017-Nov-30 18:49
2178-Jun-06 19:29 05:45 Jupiter 1.81219464392658 1.80405522227143 1.82033440526595 11.8458644439053 11.8063415756221 2516715.312146962 344.502053881254 407774.52335174 5310.074347455 7.45703831849653 3858.17543380966 T 32 CATAB v2.0e-lin.ifort 2017-Nov-30 18:49:21 2017-Nov-30 18:49

Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 2011.0   251P/2011 J1       
 2004.5   251P/2004 HC18       
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
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