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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 77 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .7504734076150344 2.5669e-07  
a 3.010398055968857 2.5142e-07 au
q .7511743686282336 8.2572e-07 au
i 12.79337926182281 3.8334e-05 deg
node 246.1551556042797 0.00028068 deg
peri 149.2442538188874 0.00025908 deg
M 184.96279258147 3.0571e-05 deg
tp 2451522.103095537555
(1999-Dec-09.60309554)
9.5187e-05 TDB
period 1907.806456229877
5.22
0.000239
6.543e-07
d
yr
n .1886983864764857 2.3639e-08 deg/d
Q 5.26962174330948 4.4011e-07 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 2.064477974039288E-9 3.969E-10
A2 [EST] -1.308831775170014E-9 1.312E-10
A3 [EST] 1.529999285537094E-9 3.785E-10
DT [EST] 27.41614337909917 4.333
  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.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      1  
   norm. resid. RMS      .80254  
   source      ORB  
   producer      Davide Farnocchia  
   solution date      2021-Feb-24 10:13:05  

Additional Information
 Earth MOID = .105828 au 
 Jupiter MOID = .630557 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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