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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 2457064.5 (2015-Feb-11.0) TDB
Reference: JPL K212/14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4317519490501375 2.1371e-07  
a 3.619799506563556 2.9021e-07 au
q 2.056944014434015 9.2709e-07 au
i 19.0918205316614 7.6277e-06 deg
node 326.7639708316963 4.7601e-05 deg
peri 24.53542337513593 6.5081e-05 deg
M 45.86180498111855 2.377e-05 deg
tp 2456744.039988387259
(2014-Mar-27.53998839)		 0.00017962 TDB
period 2515.505096846563
6.89		 0.00030251
8.282e-07		 d
yr
n .1431124112812556 1.721e-08 deg/d
Q 5.182654998693097 4.155e-07 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 4.791743337115952E-9 6.618E-10
A2 [EST] 1.297575992185322E-9 2.357E-10
   Orbit Determination Parameters
   # obs. used (total)      1697  
   data-arc span      3665 days (10.03 yr)  
   first obs. used      2011-01-04  
   last obs. used      2021-01-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59323  
   source      ORB  
   producer      Davide Farnocchia  
   solution date      2021-Feb-01 11:25:35  

Additional Information
 Earth MOID = 1.06343 au 
 Jupiter MOID = .480654 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 9.1   0.9 K212/14 2 parameter fit from 340 observations, autocmod 2.9a
comet total magnitude slope K1 15.25   n/a K212/14 autocmod 2.9a
comet nuclear magnitude M2 13.8   0.9 K212/14 from 1258 observations, autocmod 2.9a
comet nuclear magnitude slope K2 5.   n/a K212/14 autocmod 2.9a
comet nuclear phase coefficient PC 0.03   n/a K212/14 autocmod 2.9a
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

[ show close-approach data ]
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 
 1897.2   17P/1899 L1   1899 II   1899d 
 1890.3   17P/1892 V1   1892 III   1892f 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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