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141P/Machholz 2-A
Classification: Jupiter-family Comet [NEO]          SPK-ID: 1000152
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

[ hide orbit diagram ]

For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


:
Orbital Elements at Epoch 2450594.5 (1997-May-26.0) TDB
Reference: JPL 79 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .7504734077906811 2.5671e-07  
a 3.010398055328779 2.5143e-07 au
q .751174367939751 8.2577e-07 au
i 12.79337930969478 3.8334e-05 deg
node 246.1551562177739 0.00028069 deg
peri 149.244253309364 0.00025908 deg
M 184.9627925251596 3.0582e-05 deg
tp 2451522.103095540126
(1999-Dec-09.60309554)
9.5223e-05 TDB
period 1907.806455621414
5.22
0.00023901
6.544e-07
d
yr
n .1886983865366679 2.364e-08 deg/d
Q 5.269621742717808 4.4011e-07 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 2.065306462053333E-9 3.969E-10
A2 [EST] -1.308609240972262E-9 1.313E-10
A3 [EST] 1.529188050730791E-9 3.785E-10
DT [EST] 27.41521862663734 4.334
  Orbit Determination Parameters
   # obs. used (total)      411  
   data-arc span      2006 days (5.49 yr)  
   first obs. used      1994-08-15  
   last obs. used      2000-02-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      1  
   norm. resid. RMS      .80254  
   source      ORB  
   producer      Davide Farnocchia  
   solution date      2021-Aug-25 08:02:38  

Additional Information
 Earth MOID = .105828 au 
 Jupiter MOID = .630557 au 
 T_jup = 2.709 
[ hide covariance matrix ]
Orbit Covariance (10×10)
  e q tp node peri i A1 A2 A3 DT
e 6.589906362824582E-14 -2.11793779743947E-13 7.729751310182145E-12 2.601109111041207E-11 -1.645672899780025E-11 3.490760807809486E-12 8.708121302423028E-17 2.400330733683446E-17 -5.330971438444687E-17 3.762095327868008E-7
q -2.11793779743947E-13 6.818931300915729E-13 -2.4266770925756E-11 -8.733905106436924E-11 5.582916139511937E-11 -1.103720639349104E-11 -2.845117359836931E-16 -7.756353334934901E-17 1.777402577256427E-16 -1.169275377779378E-6
tp 7.729751310182145E-12 -2.4266770925756E-11 9.067403799623289E-9 1.191828804878408E-8 -7.663077064386955E-9 9.373877400462144E-10 -6.371406286806382E-16 1.013566466473114E-14 -1.935205824021116E-14 .0003807704647500982
node 2.601109111041207E-11 -8.733905106436924E-11 1.191828804878408E-8 7.878577487668613E-8 -7.018178884953988E-8 3.664134991067072E-9 2.168831603447951E-14 2.060916553113809E-14 -9.543229974903379E-14 .0006001967250480482
peri -1.645672899780025E-11 5.582916139511937E-11 -7.663077064386955E-9 -7.018178884953988E-8 6.712422039707441E-8 -3.110326807703639E-9 -6.786154292031905E-15 -1.325229448997581E-14 8.05914697635589E-14 -.0004704295110530265
i 3.490760807809486E-12 -1.103720639349104E-11 9.373877400462144E-10 3.664134991067072E-9 -3.110326807703639E-9 1.469503554268983E-9 4.651418288495038E-15 1.93341182728532E-15 -4.635036758497511E-15 4.494215458911885E-5
A1 8.708121302423028E-17 -2.845117359836931E-16 -6.371406286806382E-16 2.168831603447951E-14 -6.786154292031905E-15 4.651418288495038E-15 1.574975240368853E-19 2.607113139882612E-20 -6.291601609083589E-20 -1.385371879027352E-10
A2 2.400330733683446E-17 -7.756353334934901E-17 1.013566466473114E-14 2.060916553113809E-14 -1.325229448997581E-14 1.93341182728532E-15 2.607113139882612E-20 1.722954690400223E-20 -3.634284430502646E-20 4.415706836014339E-10
A3 -5.330971438444687E-17 1.777402577256427E-16 -1.935205824021116E-14 -9.543229974903379E-14 8.05914697635589E-14 -4.635036758497511E-15 -6.291601609083589E-20 -3.634284430502646E-20 1.432982503635354E-19 -8.644287732292203E-10
DT 3.762095327868008E-7 -1.169275377779378E-6 .0003807704647500982 .0006001967250480482 -.0004704295110530265 4.494215458911885E-5 -1.385371879027352E-10 4.415706836014339E-10 -8.644287732292203E-10 18.78575349133035

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 12.0   n/a ICQ 2005 Handbook  
comet total magnitude slope K1 30.0   n/a ICQ 2005 Handbook  

[ show close-approach data ]
Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 1999.9   141P-A/1999 P1       
 1994.7   141P-A/1994 P1-A       
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
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