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17P/Holmes
Classification: Jupiter-family Comet          SPK-ID: 1000044
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbit Diagram
Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet was implemented using 2-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances. For accurate long-term ephemerides, please instead use our Horizons system.

Note: If the applet has stopped working because of a recent Java upgrade, here is a possible workaround.
Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).


:
Orbital Elements at Epoch 2456799.5 (2014-May-22.0) TDB
Reference: JPL K077/32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4318487059555174 3.4959e-07  
a 3.619812158216908 1.5936e-06 AU
q 2.056600961888888 1.8781e-06 AU
i 19.09162446945588 9.5053e-06 deg
node 326.7647440435101 5.2884e-05 deg
peri 24.51319241986094 0.00010037 deg
M 7.94142702866304 3.7764e-05 deg
tp 2456744.008875281839
(2014-Mar-27.50887528)
0.00027181 JED
period 2515.518284866883
6.89
0.0016612
4.548e-06
d
yr
n .1431116609907889 9.4506e-08 deg/d
Q 5.183023354544929 2.2818e-06 AU

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] -5.202516959749294E-9 3.92E-10
A2 [EST] 9.771957358451228E-10 6.442E-11
A3 [EST] 1.241686413132426E-10 9.263E-11
DT [EST] -705.2879782137915 29.89
  Orbit Determination Parameters
   # obs. used (total)      3799  
   data-arc span      5448 days (14.92 yr)  
   first obs. used      1999-06-07  
   last obs. used      2014-05-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      1  
   fit RMS      .7033  
   data source      ORB  
   producer      Ryan S. Park  
   solution date      2014-May-12 10:56:12  

Additional Information
 Earth MOID = 1.0622 AU 
 T_jup = 2.859 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 10.5 mag 1. K077/32 from 238 observations, assumed slope, autocmod 2.5c
comet total magnitude slope K1 10.   n/a K077/32 autocmod 2.5c
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 
 1897.1   17P/1899 L1   1899 II   1899d 
 1890.3   17P/1892 V1   1892 III   1892f 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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