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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 2457265.5 (2015-Aug-31.0) TDB
Reference: JPL K212/18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4315839680625866 1.9565e-07  
a 3.621387946225631 2.4997e-07 au
q 2.058454966499552 8.3969e-07 au
i 19.09177234862706 7.2743e-06 deg
node 326.7637821132628 4.6733e-05 deg
peri 24.60059163508037 6.3677e-05 deg
M 74.57173468645904 2.2746e-05 deg
tp 2456744.085926039384
(2014-Mar-27.58592604)
0.00017532 TDB
period 2517.161058610945
6.89
0.00026062
7.135e-07
d
yr
n .1430182620887438 1.4808e-08 deg/d
Q 5.18432092595171 3.5785e-07 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 6.068576912105644E-9 5.578E-10
A2 [EST] 1.884605958058557E-9 1.873E-10
  Orbit Determination Parameters
   # obs. used (total)      1843  
   data-arc span      3894 days (10.66 yr)  
   first obs. used      2011-01-04  
   last obs. used      2021-09-02  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .59728  
   source      ORB  
   producer      Davide Farnocchia  
   solution date      2021-Sep-07 13:37:53  

Additional Information
 Earth MOID = 1.06466 au 
 Jupiter MOID = .480198 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   01. K212/18 2 parameter fit from 483 observations, autocmod 2.9e
comet total magnitude slope K1 15.5   n/a K212/18 autocmod 2.9e
comet nuclear magnitude M2 13.8   0.9 K212/18 from 1263 observations, autocmod 2.9e
comet nuclear magnitude slope K2 5.   n/a K212/18 autocmod 2.9e
comet nuclear phase coefficient PC 0.03   n/a K212/18 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 
 1904.0       1906 III   1906f 
 1897.1   17P/1899 L1   1899 II   1899d 
 1890.2   17P/1892 V1   1892 III   1892f 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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