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420P/Hill (2021 E1)
Classification: Jupiter-family Comet          SPK-ID: 1003033
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | 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 2459317.5 (2021-Apr-13.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4955734235595354 0.0016164  
a 5.522406750674118 0.0093728 au
q 2.785648730954256 0.0044955 au
i 14.5020125820246 0.0017775 deg
node 173.9501800364841 0.02108 deg
peri 157.2043710406524 0.11309 deg
M 329.2670933657748 0.091712 deg
tp 2459722.161744635954
(2022-May-22.66174464)
0.18374 TDB
period 4740.138308516228
12.98
12.068
0.03304
d
yr
n .07594715102578689 0.00019335 deg/d
Q 8.25916477039398 0.014018 au
  Orbit Determination Parameters
   # obs. used (total)      14  
   data-arc span      68 days  
   first obs. used      2021-03-11  
   last obs. used      2021-05-18  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      7  
   norm. resid. RMS      .50484  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-31 22:43:13  

Additional Information
 Earth MOID = 1.78063 au 
 Jupiter MOID = .710561 au 
 T_jup = 2.675 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 14.3   0.3 17 2 parameter fit from 14 observations, autocmod 2.9c
comet total magnitude slope K1 6.   n/a 17 autocmod 2.9c

[ show close-approach data ]
Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 2022.4   420P/2021 E1       
 2009.4   420P/2009 Q1       
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
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