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JPL Small-Body Database Browser
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C/2017 A3 (Elenin)
Classification: Comet          SPK-ID: 1003493
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457794.5 (2017-Feb-10.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .9110880397056671 3.5482e-05  
a 43.35238777302241 0.017442 au
q 3.854545780339492 1.4028e-05 au
i 98.50846902494695 8.4285e-05 deg
node 97.90394426140691 0.00011802 deg
peri 304.1073550031676 0.0006223 deg
M .03589468944350519 2.3287e-05 deg
tp 2457784.104493356622
(2017-Jan-30.60449336)
0.0035305 TDB
period 104260.057675279
285.45
62.92
0.1723
d
yr
n .003452904285946498 2.0838e-06 deg/d
Q 82.85022976570534 0.033333 au
  Orbit Determination Parameters
   # obs. used (total)      181  
   data-arc span      330 days  
   first obs. used      2017-01-05  
   last obs. used      2017-12-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      3  
   norm. resid. RMS      .49839  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-Jan-29 07:46:33  

Additional Information
 Earth MOID = 3.21827 au 
 Jupiter MOID = .262768 au 
 T_jup = -0.232 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 9.7   0.5 11 from 123 observations, assumed slope, autocmod 2.6k
comet total magnitude slope K1 10.   n/a 11 autocmod 2.6k
comet nuclear magnitude M2 13.2   0.5 11 from 45 observations, autocmod 2.6k
comet nuclear magnitude slope K2 5.   n/a 11 autocmod 2.6k
comet nuclear phase coefficient PC 0.03   n/a 11 autocmod 2.6k

Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 2017.1   C/2017 A3       
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]
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