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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 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .812805883983359 6.652e-06  
a 18.13456696889881 0.0006523 au
q 3.39468423308759 4.0814e-06 au
i 29.50489739077621 4.1461e-05 deg
node 262.635787449797 2.3835e-05 deg
peri 176.3289632961476 0.00014965 deg
M 1.091630501811529 6.3643e-05 deg
tp 2457329.967262385860
(2015-Nov-03.46726239)
0.00067518 TDB
period 28207.1502124504
77.23
1.5219
0.004167
d
yr
n .01276272141242751 6.8861e-07 deg/d
Q 32.87444970471002 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.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      3  
   norm. resid. RMS      .40437  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-Feb-28 08:14:59  

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 10.0   01. 20 from 323 observations, assumed slope, autocmod 2.6m
comet total magnitude slope K1 10.   n/a 20 autocmod 2.6m
comet nuclear magnitude M2 12.2   0.6 20 from 213 observations, autocmod 2.6m
comet nuclear magnitude slope K2 5.   n/a 20 autocmod 2.6m
comet nuclear phase coefficient PC 0.03   n/a 20 autocmod 2.6m

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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