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

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2458545.5 (2019-Mar-03.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .9910793921481993 2.2105e-06  
a 144.2720530425061 0.035762 au
q 1.286994409166389 1.6274e-07 au
i 160.4035376693905 1.2712e-05 deg
node 147.4835613131589 9.7672e-06 deg
peri 358.0572189618863 3.7579e-05 deg
M .01363287672835521 5.0877e-06 deg
tp 2458521.530622689491
(2019-Feb-07.03062269)
4.0639e-05 TDB
period 632953.4113541649
1732.93
235.35
0.6444
d
yr
n .0005687622399092566 2.1148e-07 deg/d
Q 287.2571116758459 0.071205 au
  Orbit Determination Parameters
   # obs. used (total)      2750  
   data-arc span      348 days  
   first obs. used      2018-12-19  
   last obs. used      2019-12-02  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   norm. resid. RMS      .50806  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 23:33:49  

Additional Information
 Earth MOID = .298944 au 
 Jupiter MOID = 1.50657 au 
 T_jup = -1.286 
[ show covariance matrix ]

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. 17 2 parameter fit from 1118 observations, autocmod 2.9c
comet total magnitude slope K1 5.25   n/a 17 autocmod 2.9c

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
2019-Feb-12 20:10 < 00:01 Earth 0.303913713609052 0.303913293642687 0.303914133575417 66.1706146813957 66.1704821870559 2458527.340165216 0.0114686606645021 21.0347755197669 10.5311246773873 -6.22201579810725 2177477.02577754 T 17 CATAB v2.0g-lin.ifort 2021-Apr-15 23:33:53 2021-Apr-15 23:33

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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