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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 2457121.5 (2015-Apr-09.0) TDB
Reference: JPL K212/16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4317224144948956 2.132e-07  
a 3.620095546965206 2.6717e-07 au
q 2.057219156727167 9.126e-07 au
i 19.09186056699054 7.542e-06 deg
node 326.7638009039733 4.7122e-05 deg
peri 24.54900259595872 6.4241e-05 deg
M 54.01060176732089 2.338e-05 deg
tp 2456744.053856824215
(2014-Mar-27.55385682)
0.00017921 TDB
period 2515.813693923646
6.89
0.0002785
7.625e-07
d
yr
n .1430948566936792 1.5841e-08 deg/d
Q 5.182971937203244 3.8251e-07 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 5.016990212111181E-9 6.526E-10
A2 [EST] 1.45041228848947E-9 2.312E-10
  Orbit Determination Parameters
   # obs. used (total)      1736  
   data-arc span      3853 days (10.55 yr)  
   first obs. used      2011-01-04  
   last obs. used      2021-07-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .59672  
   source      ORB  
   producer      Davide Farnocchia  
   solution date      2021-Jul-27 08:28:41  

Additional Information
 Earth MOID = 1.06408 au 
 Jupiter MOID = .480537 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 K212/16 2 parameter fit from 379 observations, autocmod 2.9c
comet total magnitude slope K1 15.25   n/a K212/16 autocmod 2.9c
comet nuclear magnitude M2 13.8   0.9 K212/16 from 1258 observations, autocmod 2.9c
comet nuclear magnitude slope K2 5.   n/a K212/16 autocmod 2.9c
comet nuclear phase coefficient PC 0.03   n/a K212/16 autocmod 2.9c
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 
 1890.2   17P/1892 V1   1892 III   1892f 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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