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C/2004 Q2 (Machholz)
Classification: Comet          SPK-ID: 1000507
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2453447.5 (2005-Mar-18.0) TDB
Reference: JPL 100 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .9994945528649907 7.2541e-07  
a 2384.111447008898 3.422 AU
q 1.205042300433594 2.2859e-07 AU
i 38.58902903137568 7.7982e-06 deg
node 93.62321193580385 1.3375e-05 deg
peri 19.50443425746316 2.5746e-05 deg
M .0004410220056575356 9.4968e-07 deg
tp 2453395.411000534084
(2005-Jan-24.91100053)
2.1083e-05 JED
period 42519510.51687697
116412.08
91546
250.6
d
yr
n 8.466701418331422E-6 1.8229e-08 deg/d
Q 4767.017851717363 6.8423 AU

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 1.209357799938278E-8 1.41E-10
A2 [EST] -1.398964093180459E-9 1.702E-10
A3 [EST] -2.396396714630119E-9 9.803E-11
  Orbit Determination Parameters
   # obs. used (total)      3621  
   data-arc span      743 days (2.03 yr)  
   first obs. used      2004-08-27  
   last obs. used      2006-09-09  
   planetary ephem.      DE405  
   SB-pert. ephem.      SB405-CPV-2  
   fit RMS      .63569  
   data source      ORB  
   producer      Otto Matic  
   solution date      2013-Jul-29 11:51:56  

Additional Information
 Earth MOID = .24809 AU 
 T_jup = 1.066 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 9.8 mag 2. 100 from 369 observations, assumed slope, autocmod 2.5c
comet total magnitude slope K1 12.   n/a 100 autocmod 2.5c

[ show close-approach data ]
Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 2005.1   C/2004 Q2       
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]
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