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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 2456935.5 (2014-Oct-05.0) TDB
Reference: JPL K212/9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4317819692968272 5.8208e-08  
a 3.619470530130961 1.5022e-07 au
q 2.056648416819183 2.3214e-07 au
i 19.09176048471448 7.618e-06 deg
node 326.7647629091576 5.2339e-05 deg
peri 24.51704754949114 5.9153e-05 deg
M 27.40785002822286 2.0771e-05 deg
tp 2456744.013367032022
(2014-Mar-27.51336703)
0.00014715 TDB
period 2515.162181546054
6.89
0.00015658
4.287e-07
d
yr
n .1431319231186557 8.9106e-09 deg/d
Q 5.182292643442738 2.1508e-07 au
  Orbit Determination Parameters
   # obs. used (total)      1610  
   data-arc span      3514 days (9.62 yr)  
   first obs. used      2011-01-04  
   last obs. used      2020-08-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58874  
   source      ORB  
   producer      Davide Farnocchia  
   solution date      2020-Sep-28 09:05:16  

Additional Information
 Earth MOID = 1.06268 au 
 Jupiter MOID = .480913 au 
 T_jup = 2.859 
[ hide covariance matrix ]
Orbit Covariance (6×6)
  e q tp node peri i
e 3.388140269824354E-15 -1.256967420684822E-14 2.50663489127237E-12 -4.972179436630249E-14 3.165146738438158E-13 -1.244522465700464E-14
q -1.256967420684822E-14 5.389040112141328E-14 -1.170082475898754E-11 2.08389644991876E-13 -1.451204753701509E-12 6.994749624999863E-14
tp 2.50663489127237E-12 -1.170082475898754E-11 2.165194390128777E-8 -1.113092868149857E-10 4.626196107821964E-9 -1.168683017129385E-10
node -4.972179436630249E-14 2.08389644991876E-13 -1.113092868149857E-10 2.739332089815929E-9 -2.607194165149392E-9 -1.686986779960587E-10
peri 3.165146738438158E-13 -1.451204753701509E-12 4.626196107821964E-9 -2.607194165149392E-9 3.499116991925441E-9 1.356257462893668E-10
i -1.244522465700464E-14 6.994749624999863E-14 -1.168683017129385E-10 -1.686986779960587E-10 1.356257462893668E-10 5.803439518297619E-11

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. K212/9 2 parameter fit from 257 observations, autocmod 2.9a
comet total magnitude slope K1 16.   n/a K212/9 autocmod 2.9a
comet nuclear magnitude M2 13.8   0.9 K212/9 from 1256 observations, autocmod 2.9a
comet nuclear magnitude slope K2 5.   n/a K212/9 autocmod 2.9a
comet nuclear phase coefficient PC 0.03   n/a K212/9 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

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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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