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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 ]

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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.


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

[ 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
1925-Dec-19 23:05 < 00:01 Jupiter 0.306307011505225 0.306297505178731 0.306316522485893 4.78476989917695 4.1669505566024 2424504.461716790 0.536224172663727 2475.97352156339 263.661400135593 -79.3916084050111 190849.556830317 T 39 CATAB v2.0e-lin.ifort 2017-Nov-30 18:48:44 2017-Nov-30 18:48
1973-May-19 12:03 00:02 Jupiter 1.59691710765657 1.59691382255945 1.59692039276848 6.68700683103509 6.60721107678994 2441822.002054630 1.99238178589822 403.487048404683 123.941390387952 -71.8902058965596 604991.672100576 T 39 CATAB v2.0e-lin.ifort 2017-Nov-30 18:48:44 2017-Nov-30 18:48
1985-Apr-16 08:07 00:02 Jupiter 1.41106681955029 1.41103099699896 1.41110264211389 7.04784719581778 6.96215541769959 2446171.838436001 2.14107736423305 1802.87125313509 686.71092309032 10.9033768652246 98648.2298604579 T 39 CATAB v2.0e-lin.ifort 2017-Nov-30 18:48:44 2017-Nov-30 18:48
2032-Aug-28 16:20 00:02 Jupiter 0.374333796123676 0.374304494880253 0.374363099347735 4.90793855966424 4.42293655296721 2463473.180659265 2.18893062059214 2050.13299591536 159.694147810914 46.155788099857 295559.574303344 T 39 CATAB v2.0e-lin.ifort 2017-Nov-30 18:48:44 2017-Nov-30 18:48
2092-Jan-25 18:13 00:23 Jupiter 0.893939216375183 0.893394140944324 0.894484284299359 4.29834679273541 4.0719468745314 2485172.258969220 22.6694563538466 26821.3223649612 1017.84751380104 10.530167151048 19833.1334750559 T 39 CATAB v2.0e-lin.ifort 2017-Nov-30 18:48:44 2017-Nov-30 18:48
2174-Dec-13 08:20 00:24 Jupiter 0.662536666195147 0.661970007075538 0.663103306705362 5.49365460638216 5.25579045838561 2515443.846950940 23.7078806768504 27656.6349429733 774.333581739763 8.98051661439116 13588.2884802793 T 39 CATAB v2.0e-lin.ifort 2017-Nov-30 18:48:44 2017-Nov-30 18:48
2178-Feb-04 11:47 00:43 Jupiter 1.74258506958315 1.74223135362754 1.7429388057428 3.43540537387211 3.29087606462047 2516592.990663262 43.0660718432924 20179.1482137337 1637.06473973361 -39.1917904804429 21185.6492951842 T 39 CATAB v2.0e-lin.ifort 2017-Nov-30 18:48:44 2017-Nov-30 18:48

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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