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C/2017 S7 (Lemmon)
Classification: Hyperbolic Comet          SPK-ID: 1003537
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458073.5 (2017-Nov-16.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e 1.002499815885911 3.1869e-05  
a -3045.987574152726 38.818 au
q 7.614408126154748 3.6793e-05 au
i 124.2247425576759 0.00010504 deg
node 262.7884159434695 4.9326e-05 deg
peri 187.7473830131949 0.00053703 deg
M .001009081743576474 1.9274e-05 deg
tp 2457901.386686345358
(2017-May-27.88668635)
0.0081695 TDB
period n/a
n/a
n/a
n/a
d
yr
n 5.862891848106945E-6 1.1208e-07 deg/d
Q n/a n/a au
  Orbit Determination Parameters
   # obs. used (total)      157  
   data-arc span      1056 days (2.89 yr)  
   first obs. used      2016-01-13  
   last obs. used      2018-12-04  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   norm. resid. RMS      .51311  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 23:33:36  

Additional Information
 Earth MOID = 6.63539 au 
 Jupiter MOID = 2.53336 au 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 6.7   0.5 14 from 139 observations, assumed slope, autocmod 2.9c
comet total magnitude slope K1 10.   n/a 14 autocmod 2.9c
comet nuclear magnitude M2 10.7   0.1 14 from 3 observations, autocmod 2.9c
comet nuclear magnitude slope K2 5.   n/a 14 autocmod 2.9c
comet nuclear phase coefficient PC 0.03   n/a 14 autocmod 2.9c
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]
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