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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 2455973.5 (2012-Feb-16.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .338349337441299 4.8062e-07  
a 3.562415853689197 2.4696e-07 au
q 2.357074809903078 1.5734e-06 au
i 18.87857565547379 2.0228e-05 deg
node 117.2672535239955 2.6864e-05 deg
peri 4.262574849958032 0.00030129 deg
M 148.6655247551294 0.00015976 deg
tp 2454959.301143529312
(2009-May-07.80114353)
0.0011809 TDB
period 2455.92640883508
6.72
0.00025538
6.992e-07
d
yr
n .1465841967841206 1.5242e-08 deg/d
Q 4.767756897475317 3.3052e-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.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      1  
   norm. resid. RMS      .81295  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 23:27:56  

Additional Information
 Earth MOID = 1.37352 au 
 Jupiter MOID = .363716 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 40 2 parameter fit from 248 observations, autocmod 2.9c
comet total magnitude slope K1 7.   n/a 40 autocmod 2.9c

[ 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 00:02 Jupiter 0.306306941052575 0.306297424513165 0.306316462240569 4.78477266630395 4.16695358503049 2424504.461835925 1.52252833977552 2481.48465408519 265.672756460812 -79.4278251959032 189437.039069078 T 40 CATAB v2.0g-lin.ifort 2021-Apr-15 23:27:58 2021-Apr-15 23:27
1973-May-19 12:03 00:09 Jupiter 1.59691719858255 1.59691389519851 1.59692050198803 6.68700439286024 6.60720861418343 2441822.002312090 8.83666933008453 507.683553548642 133.191186010995 -77.7482051627278 688373.096638465 T 40 CATAB v2.0g-lin.ifort 2021-Apr-15 23:27:58 2021-Apr-15 23:27
1985-Apr-16 08:08 00:08 Jupiter 1.41106568095248 1.41102983747115 1.41110152446573 7.04784520724322 6.96215333555471 2446171.838989668 8.23839128710911 1832.60283028171 857.501970988305 16.6926183665665 98054.649453205 T 40 CATAB v2.0g-lin.ifort 2021-Apr-15 23:27:58 2021-Apr-15 23:27
2032-Aug-28 16:21 00:06 Jupiter 0.374331827992562 0.374302484919598 0.374361172787621 4.9079367743626 4.42293188490503 2463473.181095147 6.28662903404911 1983.4311150258 151.160257468357 44.4365852816545 300227.729020498 T 40 CATAB v2.0g-lin.ifort 2021-Apr-15 23:27:58 2021-Apr-15 23:27
2092-Jan-25 18:21 01:32 Jupiter 0.893986315404105 0.893438851848041 0.894533763994745 4.29840062107929 4.07201595608971 2485172.264286711 91.8853907356784 26612.2837856922 1247.57537207252 7.21779021264795 10737.1319631107 T 40 CATAB v2.0g-lin.ifort 2021-Apr-15 23:27:58 2021-Apr-15 23:27
2174-Dec-13 08:26 01:12 Jupiter 0.662585573540628 0.662016105861061 0.66315502648528 5.49376573252739 5.25592456937384 2515443.851380481 71.6810052821979 27920.5654865544 770.284947625633 9.32634262970941 14720.5298744165 T 40 CATAB v2.0g-lin.ifort 2021-Apr-15 23:27:58 2021-Apr-15 23:27
2178-Feb-04 11:42 00:58 Jupiter 1.74261556260839 1.74226015516455 1.74297101045499 3.43542029161801 3.29089422289677 2516592.987194009 58.1630898955332 22296.7304629388 1429.97502101115 -39.8390816920406 235931.305802238 T 40 CATAB v2.0g-lin.ifort 2021-Apr-15 23:27:58 2021-Apr-15 23:27

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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