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84P/Giclas
Classification: Jupiter-family Comet          SPK-ID: 1000033
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
:
Orbital Elements at Epoch 2456717.5 (2014-Mar-01.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4948145808262026 2.1921e-07  
a 3.641046358127896 4.4121e-08 AU
q 1.83940353066207 8.0306e-07 AU
i 7.28694024115594 1.2185e-05 deg
node 112.3811480943396 6.6779e-05 deg
peri 276.4944874744296 8.3526e-05 deg
M 31.31204899931629 1.6867e-05 deg
tp 2456496.777438915131
(2013-Jul-23.27743891)
0.00011714 JED
period 2537.685157310781
6.95
4.6126e-05
1.263e-07
d
yr
n .1418615697707342 2.5785e-09 deg/d
Q 5.442689185593723 6.5952e-08 AU

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A2 [EST] -2.263855762846723E-11 3.574E-13
  Orbit Determination Parameters
   # obs. used (total)      1198  
   data-arc span      12928 days (35.39 yr)  
   first obs. used      1978-09-11  
   last obs. used      2014-02-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .70195  
   data source      ORB  
   producer      Ryan S. Park  
   solution date      2014-Feb-19 13:23:37  

Additional Information
 Earth MOID = .859712 AU 
 T_jup = 2.871 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 12.0 mag 1. 37 from 350 observations, assumed slope, autocmod 2.5c
comet total magnitude slope K1 15.   n/a 37 autocmod 2.5c
comet nuclear magnitude M2 15.3 mag 0.8 37 from 639 observations, autocmod 2.5c
comet nuclear magnitude slope K2 5.   n/a 37 autocmod 2.5c
comet nuclear phase coefficient PC 0.03   n/a 37 autocmod 2.5c
diameter diameter 1.80 km n/a Lamy,P.L.,Toth,I.,Fernandez,Y.R.,Weaver,H.A. (2004) Comets II, pp. 223-264  

84P/Giclas          Discovered 1978-Sep-08 by Giclas, Henry L. at Lowell Observatory
First known observation: 1978/09/03
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
1923-Mar-02 04:55 < 00:01 Jupiter 1.13972004586935 1.13970889552314 1.13973119612461 5.94440201133644 5.81803625334992 2423480.704524456 0.364268095157515 91.1793392734161 9.39525162617034 -9.88513076855034 353603.9776281 T 37 CATAB v2.0c-linF95 2014-Feb-19 13:32:01 2014-Feb-19 13:32
1934-Feb-06 04:15 00:01 Jupiter 0.958633904662884 0.958591488741095 0.958676319880762 6.2031160776488 6.05900191088164 2427474.676953413 1.48743363143994 355.683106934007 18.1286433501732 -23.2559048008968 322559.801264442 T 37 CATAB v2.0c-linF95 2014-Feb-19 13:32:01 2014-Feb-19 13:32
1981-Aug-18 10:01 00:01 Jupiter 0.540697354569799 0.540694177867498 0.540700531270434 4.2023298442877 3.81136481266635 2444834.917665295 1.02692786325127 13.4643088145288 10.6232911658958 -82.3416270028489 528560.708533846 T 37 CATAB v2.0c-linF95 2014-Feb-19 13:32:01 2014-Feb-19 13:32
2018-Apr-03 23:43 < 00:01 Jupiter 1.10285207294813 1.10284387958568 1.10286026628937 6.44095437915074 6.32058818927991 2458212.488050329 0.543187651424928 60.3364034866518 9.81625086380122 -19.3170016971872 653694.8040209 T 37 CATAB v2.0c-linF95 2014-Feb-19 13:32:01 2014-Feb-19 13:32
2029-Mar-13 17:42 < 00:01 Jupiter 1.76185215692124 1.76184528555867 1.76185902826256 8.38551642205989 8.3279872681752 2462209.237766616 0.62186816824158 74.9237142925486 20.6462670637669 -3.45314702942625 500922.501197155 T 37 CATAB v2.0c-linF95 2014-Feb-19 13:32:01 2014-Feb-19 13:32
2065-Sep-27 03:09 < 00:01 Jupiter 0.99448698531008 0.994460672520505 0.994513297743467 6.18921772677303 6.05003966677422 2475555.631317300 0.983521362212957 231.046446670161 9.36011477032237 -20.7497496580865 578927.33845826 T 37 CATAB v2.0c-linF95 2014-Feb-19 13:32:01 2014-Feb-19 13:32
2076-Aug-20 13:54 00:01 Jupiter 1.29740207473737 1.29739014410305 1.29741400527514 6.89499811334823 6.79965278983556 2479536.078858591 1.44810022996602 114.951394870903 16.939310290703 -5.70021021170171 231414.402950556 T 37 CATAB v2.0c-linF95 2014-Feb-19 13:32:01 2014-Feb-19 13:32
2124-Feb-17 07:08 00:04 Jupiter 0.672905025118044 0.672876176626511 0.672933876422581 4.50344826075073 4.21468105354886 2496881.797116047 4.37269758007226 269.874795508541 11.050207043835 -46.0197865743309 489214.816443725 T 37 CATAB v2.0c-linF95 2014-Feb-19 13:32:01 2014-Feb-19 13:32
2160-May-07 03:06 00:28 Jupiter 0.425223143423272 0.425170489606214 0.42527580007729 3.89449513923724 3.34412855588126 2510110.629176441 28.4313449204589 150.40854210955 6.81064529072857 26.8597902289699 266616.202948636 T 37 CATAB v2.0c-linF95 2014-Feb-19 13:32:01 2014-Feb-19 13:32

Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 1992.7       1992 XXV   1992l 
 1985.8   84P/1985 M1   1985 XV   1985g 
 1978.8   84P/1978 R2   1978 XXII   1978k 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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