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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 2456911.5 (2014-Sep-11.0) TDB
Reference: JPL K212/6 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4317913340624554 6.0599e-08  
a 3.619500432811194 1.796e-07 au
q 2.056631512288014 2.322e-07 au
i 19.09176274726408 7.6397e-06 deg
node 326.7648598665065 5.3416e-05 deg
peri 24.51604191625368 6.0356e-05 deg
M 23.97251029004195 2.1054e-05 deg
tp 2456744.012504227728
(2014-Mar-27.51250423)
0.00014869 TDB
period 2515.193350571397
6.89
0.0001872
5.125e-07
d
yr
n .1431301493852215 1.0653e-08 deg/d
Q 5.182369353334376 2.5715e-07 au
  Orbit Determination Parameters
   # obs. used (total)      1593  
   data-arc span      3478 days (9.52 yr)  
   first obs. used      2011-01-04  
   last obs. used      2020-07-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58411  
   source      ORB  
   producer      Javier Roa  
   solution date      2020-Jul-21 08:08:57  

Additional Information
 Earth MOID = 1.06275 au 
 Jupiter MOID = .480911 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 8.7   01. K212/6 2 parameter fit from 240 observations, autocmod 2.8
comet total magnitude slope K1 15.75   n/a K212/6 autocmod 2.8
comet nuclear magnitude M2 13.8   0.9 K212/6 from 1256 observations, autocmod 2.8
comet nuclear magnitude slope K2 5.   n/a K212/6 autocmod 2.8
comet nuclear phase coefficient PC 0.03   n/a K212/6 autocmod 2.8
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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