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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 2453456.5 (2005-Mar-27.0) TDB
Reference: JPL 101 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .9994985940627301 7.6503e-07  
a 2403.324862711654 3.6674 AU
q 1.20504135535195 2.7338e-07 AU
i 38.58896260507633 8.0673e-06 deg
node 93.62296917232108 1.5414e-05 deg
peri 19.5045941814958 2.9225e-05 deg
M .0005110316957791374 1.1699e-06 deg
tp 2453395.411075063301
(2005-Jan-24.91107506)
2.4945e-05 JED
period 43034538.09001382
117822.14
98503
269.7
d
yr
n 8.365373859642709E-6 1.9148e-08 deg/d
Q 4805.444684067956 7.3329 AU

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 1.237532556383019E-8 1.516E-10
A2 [EST] -1.375092705516764E-9 1.797E-10
A3 [EST] -2.43584308271435E-9 1.02E-10
  Orbit Determination Parameters
   # obs. used (total)      3628  
   data-arc span      743 days (2.03 yr)  
   first obs. used      2004-08-27  
   last obs. used      2006-09-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   fit RMS      .58671  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-13 19:43:28  

Additional Information
 Earth MOID = .249325 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 9.9 mag 2. 101 from 346 observations, assumed slope, autocmod 2.5c
comet total magnitude slope K1 13.   n/a 101 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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