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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2455419.5 (2010-Aug-11.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4954278099134556 9.3864e-06  
a 5.528195104766178 2.1782e-05 au
q 2.789373511237584 6.2714e-05 au
i 14.44560904023826 0.00030217 deg
node 174.0878155705845 7.5656e-05 deg
peri 157.8466224455879 0.0054967 deg
M 30.57835558412015 0.0016461 deg
tp 2455016.240046437238
(2009-Jul-03.74004644)
0.019392 TDB
period 4747.592880958759
13.00
0.028059
7.682e-05
d
yr
n .07582790037533702 4.4816e-07 deg/d
Q 8.267016698294773 3.2573e-05 au
  Orbit Determination Parameters
   # obs. used (total)      161  
   data-arc span      4320 days (11.83 yr)  
   first obs. used      2009-08-16  
   last obs. used      2021-06-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      3  
   norm. resid. RMS      .8605  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 17:15:38  

Additional Information
 Earth MOID = 1.7854 au 
 Jupiter MOID = .721756 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 13.1   1. 21 2 parameter fit from 116 observations, autocmod 2.9c
comet total magnitude slope K1 8.   n/a 21 autocmod 2.9c

[ show close-approach data ]
Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 2022.5   420P/2021 E1       
 2009.5   420P/2009 Q1       
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
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