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C/2015 X4 (Elenin)
Classification: Jupiter-family Comet          SPK-ID: 1003424
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457415.5 (2016-Jan-28.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .8128069022727644 6.652e-06  
a 18.13466534731507 0.00065231 au
q 3.394684182610662 4.0814e-06 au
i 29.50490070566778 4.1461e-05 deg
node 262.6358029046453 2.3835e-05 deg
peri 176.3289764086126 0.00014965 deg
M 1.091619495690537 6.3643e-05 deg
tp 2457329.967428745413
(2015-Nov-03.46742875)
0.00067518 TDB
period 28207.37974469124
77.23
1.5219
0.004167
d
yr
n .01276261755818541 6.8861e-07 deg/d
Q 32.87464651201947 0.0011825 au
  Orbit Determination Parameters
   # obs. used (total)      599  
   data-arc span      823 days (2.25 yr)  
   first obs. used      2014-12-22  
   last obs. used      2017-03-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      3  
   norm. resid. RMS      .40517  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 23:33:20  

Additional Information
 Earth MOID = 2.41104 au 
 Jupiter MOID = 1.7007 au 
 T_jup = 2.180 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 13.1   0.9 21 2 parameter fit from 323 observations, autocmod 2.9c
comet total magnitude slope K1 4.5   n/a 21 autocmod 2.9c

Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 2015.8   C/2015 X4       
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters ]
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