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211P/Hill
Classification: Jupiter-family Comet          SPK-ID: 1003004
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

[ hide orbit diagram ]

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 2455995.5 (2012-Mar-09.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3383819983698705 4.777e-07  
a 3.562335814948082 2.4587e-07 au
q 2.356905503021389 1.5639e-06 au
i 18.8790788406648 2.01e-05 deg
node 117.2669288612731 2.6472e-05 deg
peri 4.262434031254962 0.00030064 deg
M 151.8894119350225 0.00015911 deg
tp 2454959.342648645160
(2009-May-07.84264865)		 0.0011781 TDB
period 2455.843641341616
6.72		 0.00025425
6.961e-07		 d
yr
n .1465891370035813 1.5176e-08 deg/d
Q 4.767766126874775 3.2907e-07 au
   Orbit Determination Parameters
   # obs. used (total)      660  
   data-arc span      2733 days (7.48 yr)  
   first obs. used      2008-12-04  
   last obs. used      2016-05-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      1  
   norm. resid. RMS      .81587  
   source      ORB  
   producer      Otto Matic  
   solution date      2016-Jun-21 15:03:03  

Additional Information
 Earth MOID = 1.37358 au 
 Jupiter MOID = .363798 au 
 T_jup = 2.934 
[ hide covariance matrix ]
Orbit Covariance (6×6)
  e q tp node peri i
e 2.281982208004904E-13 -7.460130139880315E-13 -3.094085472982162E-10 7.648115898176891E-13 -6.409480124307543E-11 -4.199865693470791E-12
q -7.460130139880315E-13 2.445670537268725E-12 9.34518480841494E-10 -2.75427406423988E-12 1.887709078660233E-10 1.341099645559202E-11
tp -3.094085472982162E-10 9.34518480841494E-10 1.387835555908159E-6 2.172907092279791E-9 3.503660511685509E-7 1.002676616279926E-8
node 7.648115898176891E-13 -2.75427406423988E-12 2.172907092279791E-9 7.007846034133908E-10 1.260864790859664E-11 -2.427716375404627E-10
peri -6.409480124307543E-11 1.887709078660233E-10 3.503660511685509E-7 1.260864790859664E-11 9.0386269093946E-8 2.598803556659242E-9
i -4.199865693470791E-12 1.341099645559202E-11 1.002676616279926E-8 -2.427716375404627E-10 2.598803556659242E-9 4.040042982978134E-10

[ 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 14.1   0.7 39 2 parameter fit from 248 observations, autocmod 2.6g
comet total magnitude slope K1 7.   n/a 39 autocmod 2.6g

[ show close-approach data ]
Alternate Designations
 Perihelion 
Year (est.)		  New-Style 
Desig		 Roman
 Numeral 		 Year/
 Letter 
 2009.3   211P/2008 X1       
 2002.6   211P/2003 F6       
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
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