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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 
[ hide covariance matrix ]
Orbit Covariance (8×8)
  e q tp node peri i A1 A2
e 3.223698707031727E-14 -1.381843251638046E-13 7.99027490098562E-12 1.539269201759211E-13 -3.597276316001484E-12 -1.126334345674151E-13 8.318368793748175E-17 2.066544721212362E-17
q -1.381843251638046E-13 5.958268688932917E-13 -3.871520721688664E-11 -7.49843139766582E-13 1.476131299551471E-11 5.214423999124947E-13 -3.628514436596731E-16 -9.236131077492576E-17
tp 7.99027490098562E-12 -3.871520721688664E-11 3.027654050983618E-8 -2.408622645755155E-10 5.723286531640255E-9 -1.724428801995161E-10 2.497391499692856E-14 1.508748392754812E-14
node 1.539269201759211E-13 -7.49843139766582E-13 -2.408622645755155E-10 2.178037182669342E-9 -2.14341688816978E-9 -1.232622377934495E-10 4.509303229983635E-16 2.166268690859123E-17
peri -3.597276316001484E-12 1.476131299551471E-11 5.723286531640255E-9 -2.14341688816978E-9 3.96961258921597E-9 9.724100572362419E-11 -8.92636978538381E-15 -8.001104935606667E-17
i -1.126334345674151E-13 5.214423999124947E-13 -1.724428801995161E-10 -1.232622377934495E-10 9.724100572362419E-11 5.120111997403596E-11 -3.370966346658964E-16 -1.378512592429604E-16
A1 8.318368793748175E-17 -3.628514436596731E-16 2.497391499692856E-14 4.509303229983635E-16 -8.92636978538381E-15 -3.370966346658964E-16 2.407791512947575E-19 6.646062584429494E-20
A2 2.066544721212362E-17 -9.236131077492576E-17 1.508748392754812E-14 2.166268690859123E-17 -8.001104935606667E-17 -1.378512592429604E-16 6.646062584429494E-20 2.673876488551733E-20

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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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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