Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
17P/Holmes
Classification: Jupiter-family Comet          SPK-ID: 1000044
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ hide orbit diagram ]

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.


[ revert to old Java-based viewer ]

:
Orbital Elements at Epoch 2456935.5 (2014-Oct-05.0) TDB
Reference: JPL K212/8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4317819692997668 5.8208e-08  
a 3.619470530147662 1.5022e-07 au
q 2.056648416818033 2.3214e-07 au
i 19.09176048473291 7.618e-06 deg
node 326.7647629091477 5.2339e-05 deg
peri 24.51704754903511 5.9153e-05 deg
M 27.4078500282918 2.0771e-05 deg
tp 2456744.013367030215
(2014-Mar-27.51336703)
0.00014715 TDB
period 2515.162181563462
6.89
0.00015658
4.287e-07
d
yr
n .143131923117665 8.9106e-09 deg/d
Q 5.18229264347729 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-Aug-25 11:31:10  

Additional Information
 Earth MOID = 1.06268 au 
 Jupiter MOID = .480913 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. K212/8 2 parameter fit from 257 observations, autocmod 2.8
comet total magnitude slope K1 16.   n/a K212/8 autocmod 2.8
comet nuclear magnitude M2 13.8   0.9 K212/8 from 1256 observations, autocmod 2.8
comet nuclear magnitude slope K2 5.   n/a K212/8 autocmod 2.8
comet nuclear phase coefficient PC 0.03   n/a K212/8 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

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1908-Dec-09 02:55 00:02 Jupiter 0.546154202060512 0.546134851794099 0.546173552422762 5.63485755811996 5.35255538303883 2418284.621664419 2.0454269464903 1035.31113786679 160.952083221485 24.8295049744485 182089.15109582 T K212/8 CATAB v2.0f-lin.ifort 2020-Aug-25 11:42:02 2020-Aug-25 11:42
1968-Apr-16 02:29 00:04 Jupiter 1.02650715703767 1.02649551686594 1.02651879721663 4.93686033085611 4.76679028938794 2439962.603247998 4.16188096861906 597.577189151832 126.698203433321 18.5065911203932 375397.422251583 T K212/8 CATAB v2.0f-lin.ifort 2020-Aug-25 11:42:02 2020-Aug-25 11:42
2004-Jan-18 06:54 00:03 Jupiter 1.49629068890923 1.49628364803225 1.49629772978681 5.74613345737178 5.6467589517239 2453022.787690156 2.92590124735141 355.541667196792 151.238707961422 14.1710343987096 560791.463419041 T K212/8 CATAB v2.0f-lin.ifort 2020-Aug-25 11:42:02 2020-Aug-25 11:42
2051-Apr-08 01:28 00:02 Jupiter 0.856729169226193 0.856716640827616 0.856741697666603 6.34150963060273 6.18364004364991 2470269.560808370 2.02559176152447 700.995445056254 177.988052617808 29.959955028948 282441.365637945 T K212/8 CATAB v2.0f-lin.ifort 2020-Aug-25 11:42:02 2020-Aug-25 11:42
2087-Feb-19 20:03 00:06 Jupiter 1.9495839505372 1.94955426942248 1.94961363166023 8.83894195813084 8.78965121630755 2483371.335305694 5.73290640734677 1494.11381313554 202.803152748983 10.1509921113028 202374.367801019 T K212/8 CATAB v2.0f-lin.ifort 2020-Aug-25 11:42:02 2020-Aug-25 11:42
2146-May-04 00:11 00:04 Jupiter 1.2823248397252 1.28232142393154 1.28232825552418 4.91054891987 4.77414049371801 2504993.507837687 3.70592454704923 248.508445066668 112.689351348477 58.1760916748551 1029717.80078818 T K212/8 CATAB v2.0f-lin.ifort 2020-Aug-25 11:42:02 2020-Aug-25 11:42

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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Sep-21 00:47 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin