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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 ]

[ show orbit diagram ]
:
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 
[ 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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