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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.


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:
Orbital Elements at Epoch 2456949.5 (2014-Oct-19.0) TDB
Reference: JPL K212/10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4317776320755817 5.7671e-08  
a 3.619467368444918 1.42e-07 au
q 2.056662318722934 2.3213e-07 au
i 19.09176194379896 7.6124e-06 deg
node 326.7646770777081 5.167e-05 deg
peri 24.51796769126263 5.8634e-05 deg
M 29.41157528215898 2.0655e-05 deg
tp 2456744.014486329429
(2014-Mar-27.51448633)
0.0001468 TDB
period 2515.158885973665
6.89
0.00014801
4.052e-07
d
yr
n .1431321106621212 8.4229e-09 deg/d
Q 5.182272418166901 2.0331e-07 au
  Orbit Determination Parameters
   # obs. used (total)      1622  
   data-arc span      3566 days (9.76 yr)  
   first obs. used      2011-01-04  
   last obs. used      2020-10-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59041  
   source      ORB  
   producer      Davide Farnocchia  
   solution date      2020-Oct-19 10:41:18  

Additional Information
 Earth MOID = 1.0628 au 
 Jupiter MOID = .480905 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 8.9   01. K212/10 2 parameter fit from 269 observations, autocmod 2.9a
comet total magnitude slope K1 15.5   n/a K212/10 autocmod 2.9a
comet nuclear magnitude M2 13.8   0.9 K212/10 from 1256 observations, autocmod 2.9a
comet nuclear magnitude slope K2 5.   n/a K212/10 autocmod 2.9a
comet nuclear phase coefficient PC 0.03   n/a K212/10 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 
 1904.1       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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