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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 2456872.5 (2014-Aug-03.0) TDB
Reference: JPL K212/1 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4318134405110877 1.5741e-07  
a 3.619609985314088 8.7743e-07 au
q 2.056613744247324 2.3568e-07 au
i 19.09175525320228 7.6603e-06 deg
node 326.764799658168 5.4399e-05 deg
peri 24.515349359396 6.1587e-05 deg
M 18.38958185955222 2.2918e-05 deg
tp 2456744.012627847256
(2014-Mar-27.51262785)		 0.00014992 TDB
period 2515.30754360035
6.89		 0.00091461
2.504e-06		 d
yr
n .1431236513864642 5.2042e-08 deg/d
Q 5.182606226380852 1.2563e-06 au
   Orbit Determination Parameters
   # obs. used (total)      1564  
   data-arc span      3047 days (8.34 yr)  
   first obs. used      2011-01-04  
   last obs. used      2019-05-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      1  
   norm. resid. RMS      .57695  
   source      ORB  
   producer      Davide Farnocchia  
   solution date      2019-May-15 15:23:08  

Additional Information
 Earth MOID = 1.06287 au 
 Jupiter MOID = .480846 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   0.9 K212/1 2 parameter fit from 212 observations, autocmod 2.6q
comet total magnitude slope K1 15.   n/a K212/1 autocmod 2.6q
comet nuclear magnitude M2 13.8   0.9 K212/1 from 1256 observations, autocmod 2.6q
comet nuclear magnitude slope K2 5.   n/a K212/1 autocmod 2.6q
comet nuclear phase coefficient PC 0.03   n/a K212/1 autocmod 2.6q
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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