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C/2016 U1 (NEOWISE)
Classification: Hyperbolic Comet          SPK-ID: 1003489
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457734.5 (2016-Dec-12.0) TDB
Reference: JPL 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e 1.000252972408931 1.3192e-05  
a -1261.677713642262 65.775 au
q .3191696505147323 5.0938e-06 au
i 46.4348325774933 0.00042642 deg
node 61.4285207447346 0.00054397 deg
peri 162.7482703416102 0.0011286 deg
M -.0007261314538874346 5.6779e-05 deg
tp 2457767.516712133325
(2017-Jan-14.01671213)
0.00014917 TDB
period n/a
n/a
n/a
n/a
d
yr
n 2.199284565208184E-5 1.7198e-06 deg/d
Q n/a n/a au
  Orbit Determination Parameters
   # obs. used (total)      366  
   data-arc span      83 days  
   first obs. used      2016-10-21  
   last obs. used      2017-01-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   norm. resid. RMS      .91278  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 23:33:28  

Additional Information
 Earth MOID = .589302 au 
 Jupiter MOID = .810786 au 
 T_jup = 0.489 
[ hide covariance matrix ]
Orbit Covariance (6×6)
  e q tp node peri i
e 1.740321236672973E-10 6.656046352703034E-11 -1.959010480423513E-9 7.088031242247597E-9 -1.47898036140549E-8 5.58008511033222E-9
q 6.656046352703034E-11 2.594656009614107E-11 -7.476147073693656E-10 2.721978502906879E-9 -5.734850336030654E-9 2.140552627724207E-9
tp -1.959010480423513E-9 -7.476147073693656E-10 2.225097357530453E-8 -7.980682851605978E-8 1.666849430929612E-7 -6.276133096332723E-8
node 7.088031242247597E-9 2.721978502906879E-9 -7.980682851605978E-8 2.959018197462595E-7 -6.084654943929109E-7 2.315296399406534E-7
peri -1.47898036140549E-8 -5.734850336030654E-9 1.666849430929612E-7 -6.084654943929109E-7 1.273753651538258E-6 -4.774653312468853E-7
i 5.58008511033222E-9 2.140552627724207E-9 -6.276133096332723E-8 2.315296399406534E-7 -4.774653312468853E-7 1.818297692096562E-7

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 13.1   0.9 8 2 parameter fit from 52 observations, autocmod 2.9c
comet total magnitude slope K1 12.25   n/a 8 autocmod 2.9c
comet nuclear magnitude M2 19.5   1. 8 from 167 observations, autocmod 2.9c
comet nuclear magnitude slope K2 5.   n/a 8 autocmod 2.9c
comet nuclear phase coefficient PC 0.03   n/a 8 autocmod 2.9c
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]
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