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C/2018 Y1 (Iwamoto)
Classification: Comet          SPK-ID: 1003600
[ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458539.5 (2019-Feb-25.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .9910749121200269 2.6658e-06  
a 144.1995760186021 0.043085 au
q 1.286993888220892 1.7601e-07 au
i 160.4035047857908 1.3962e-05 deg
node 147.4835367193609 9.956e-06 deg
peri 358.05706014 3.9755e-05 deg
M .01022809745449943 4.6027e-06 deg
tp 2458521.530468322186
(2019-Feb-07.03046832)		 4.2893e-05 TDB
period 632476.512155959
1731.63		 283.46
0.7761		 d
yr
n .0005691910973465991 2.551e-07 deg/d
Q 287.1121581489833 0.085785 au
   Orbit Determination Parameters
   # obs. used (total)      2704  
   data-arc span      348 days  
   first obs. used      2018-12-19  
   last obs. used      2019-12-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   norm. resid. RMS      .50457  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 00:54:45  

Additional Information
 Earth MOID = .298986 au 
 Jupiter MOID = 1.50656 au 
 T_jup = -1.286 
[ hide covariance matrix ]
Orbit Covariance (6×6)
  e q tp node peri i
e 7.106269692571271E-12 3.519614405568398E-13 8.752508553391212E-11 4.056455803749373E-12 7.715261170440123E-11 7.131702018032277E-12
q 3.519614405568398E-13 3.097829020724464E-14 5.421827037687728E-12 2.918687816145134E-13 5.031198398707318E-12 4.256718655831355E-13
tp 8.752508553391212E-11 5.421827037687728E-12 1.839803799188748E-9 6.647113034674081E-11 1.651260250619682E-9 9.746201241425958E-11
node 4.056455803749373E-12 2.918687816145134E-13 6.647113034674081E-11 9.912205161996647E-11 1.493873716847197E-10 5.26053952356389E-11
peri 7.715261170440123E-11 5.031198398707318E-12 1.651260250619682E-9 1.493873716847197E-10 1.580461768419417E-9 1.322107710521065E-10
i 7.131702018032277E-12 4.256718655831355E-13 9.746201241425958E-11 5.26053952356389E-11 1.322107710521065E-10 1.949413648933872E-10

[ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 13.6   1. 15 2 parameter fit from 1074 observations, autocmod 2.8
comet total magnitude slope K1 4.75   n/a 15 autocmod 2.8

[ show close-approach data ]
Alternate Designations
 Perihelion 
Year (est.)		  New-Style 
Desig		 Roman
 Numeral 		 Year/
 Letter 
 2019.1   C/2018 Y1       
[ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]
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