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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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Orbit Diagram
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Note: This Java-based orbit viewer will eventually be retired.

Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet 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. For accurate long-term ephemerides, please instead use our Horizons system.

Note: If the applet is not working, here are some notes that might help.
Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).


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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