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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 ]

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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 76 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .750473400341293 2.035e-07  
a 3.010396713833522 1.127e-07 au
q .7511740556266244 6.35e-07 au
i 12.79324524634592 3.8394e-05 deg
node 246.155368238116 0.00028344 deg
peri 149.2439177915666 0.00028289 deg
M 184.9628741838411 8.4517e-06 deg
tp 2451522.102042754862
(1999-Dec-09.60204276)
5.9871e-05 TDB
period 1907.805180384894
5.22
0.00010713
2.933e-07
d
yr
n .1886985126685583 1.0597e-08 deg/d
Q 5.269619372040419 1.9728e-07 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 4.087965035210728E-9 2.308E-10
A2 [EST] -1.953971412220909E-9 4.333E-11
A3 [EST] 1.338030423493252E-9 2.379E-10
  Orbit Determination Parameters
   # obs. used (total)      406  
   data-arc span      2006 days (5.49 yr)  
   first obs. used      1994-08-15  
   last obs. used      2000-02-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .80672  
   source      ORB  
   producer      Davide Farnocchia  
   solution date      2020-Oct-22 15:39:08  

Additional Information
 Earth MOID = .105827 au 
 Jupiter MOID = .63056 au 
 T_jup = 2.709 
[ 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 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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