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17P/Holmes
Classification: Jupiter-family Comet          SPK-ID: 1000044
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | 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.


:
Orbital Elements at Epoch 2457322.5 (2015-Oct-27.0) TDB
Reference: JPL K212/19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4314598879531091 1.7955e-07  
a 3.622132628962839 2.3419e-07 au
q 2.059327690719232 7.719e-07 au
i 19.09069262329832 7.1555e-06 deg
node 326.765575427377 4.6669e-05 deg
peri 24.62803037435904 6.3005e-05 deg
M 82.70003216329697 2.2691e-05 deg
tp 2456744.073572136278
(2014-Mar-27.57357214)
0.000174 TDB
period 2517.937521714241
6.89
0.00024419
6.686e-07
d
yr
n .1429741591661527 1.3866e-08 deg/d
Q 5.184937567206446 3.3523e-07 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 6.265266602125278E-9 4.907E-10
A2 [EST] 1.954793103376864E-9 1.635E-10
  Orbit Determination Parameters
   # obs. used (total)      1885  
   data-arc span      3909 days (10.70 yr)  
   first obs. used      2011-01-04  
   last obs. used      2021-09-17  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .60141  
   source      ORB  
   producer      Davide Farnocchia  
   solution date      2021-Sep-20 09:29:48  

Additional Information
 Earth MOID = 1.06585 au 
 Jupiter MOID = .480125 au 
 T_jup = 2.859 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 8.8   0.9 K212/19 2 parameter fit from 521 observations, autocmod 2.9e
comet total magnitude slope K1 15.75   n/a K212/19 autocmod 2.9e
comet nuclear magnitude M2 13.8   0.9 K212/19 from 1266 observations, autocmod 2.9e
comet nuclear magnitude slope K2 5.   n/a K212/19 autocmod 2.9e
comet nuclear phase coefficient PC 0.03   n/a K212/19 autocmod 2.9e
diameter diameter 3.42 km n/a DASTCOM value unverified

17P/Holmes          Discovered 1892-Nov-07 by Holmes, Edwin at London, England
Reference: comet.disLast Updated: 2003-08-29

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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
1908-Dec-09 12:50 02:20 Jupiter 0.547835617212976 0.547446835354677 0.548224401980049 5.6345317934559 5.35310171023216 2418285.034787773 139.677086090508 19490.7262036117 1355.29560995064 7.22146327181368 9916.96535309141 T K212/19 CATAB v2.0g-lin.ifort 2021-Sep-20 09:32:02 2021-Sep-20 09:32
1968-Apr-15 03:57 05:41 Jupiter 1.02081779947385 1.01937366481058 1.02226194594436 4.92997231650472 4.75868985271351 2439961.664706833 340.625021006523 72191.1354016616 277.244379354107 12.3104318054881 134292.748900379 T K212/19 CATAB v2.0g-lin.ifort 2021-Sep-20 09:32:02 2021-Sep-20 09:32
2004-Jan-18 03:12 00:58 Jupiter 1.49585761738776 1.49573996593924 1.49597526841344 5.74466670100969 5.645237345231 2453022.633133988 58.0172193572889 5728.47843312396 200.851943219134 6.81462847287955 61340.5012415521 T K212/19 CATAB v2.0g-lin.ifort 2021-Sep-20 09:32:02 2021-Sep-20 09:32
2051-Apr-08 05:00 00:57 Jupiter 0.86012316240599 0.859285688685713 0.860960898937122 6.35028202746207 6.19326602824528 2470269.708237983 57.2842408138935 48169.5476636889 809.414900469688 31.7673967109658 57606.212444621 T K212/19 CATAB v2.0g-lin.ifort 2021-Sep-20 09:32:02 2021-Sep-20 09:32
2087-Feb-19 15:07 01:09 Jupiter 1.95108348774241 1.95068177124132 1.9514852356924 8.84478643983469 8.79556641518156 2483371.129647795 69.3394144617475 23606.2698667569 2476.06879253813 33.01079637135 38374.0874572029 T K212/19 CATAB v2.0g-lin.ifort 2021-Sep-20 09:32:02 2021-Sep-20 09:32
2146-May-03 11:04 03:16 Jupiter 1.27760162606574 1.27642325586181 1.2787805079854 4.90689851167738 4.76987377663565 2504992.961135122 195.789882090766 71596.7315448636 1537.5108265081 35.9960440827183 290095.15501882 T K212/19 CATAB v2.0g-lin.ifort 2021-Sep-20 09:32:02 2021-Sep-20 09:32

Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 1993.6       1993 VII   1993i 
 1986.7       1986 V   1986f 
 1979.8       1979 IV   1979f 
 1972.9       1972 I   1971b 
 1966.0   17P/1964 O1   1964 X   1964i 
 1903.9       1906 III   1906f 
 1897.0   17P/1899 L1   1899 II   1899d 
 1890.1   17P/1892 V1   1892 III   1892f 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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