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JPL Small-Body Database Browser
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84P/Giclas
Classification: Jupiter-family Comet          SPK-ID: 1000033
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
:
Orbital Elements at Epoch 2454655.5 (2008-Jul-08.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4927078894965374 5.2958e-07  
a 3.646377628853794 5.7297e-08 au
q 1.849778603033853 1.952e-06 au
i 7.281512688227041 1.4932e-05 deg
node 112.4720674809058 7.3658e-05 deg
peri 276.2615127158606 0.00015424 deg
M 99.15430633234178 2.936e-05 deg
tp 2453955.013174268545
(2006-Aug-07.51317427)
0.00019358 TDB
period 2543.260767899399
6.96
5.9945e-05
1.641e-07
d
yr
n .1415505655353388 3.3364e-09 deg/d
Q 5.442976654673735 8.5528e-08 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 4.291901471361834E-10 1.025E-10
A2 [EST] -2.323975155849856E-11 4.565E-13
  Orbit Determination Parameters
   # obs. used (total)      1261  
   data-arc span      12985 days (35.55 yr)  
   first obs. used      1978-09-03  
   last obs. used      2014-03-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .64559  
   source      ORB  
   producer      Davide Farnocchia  
   solution date      2017-Jun-08 16:15:29  

Additional Information
 Earth MOID = .871226 au 
 Jupiter MOID = .552254 au 
 T_jup = 2.872 
[ 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 11.9   1. 39 from 358 observations, assumed slope, autocmod 2.6i
comet total magnitude slope K1 15.   n/a 39 autocmod 2.6i
comet nuclear magnitude M2 15.3   0.8 39 from 676 observations, autocmod 2.6i
comet nuclear magnitude slope K2 5.   n/a 39 autocmod 2.6i
comet nuclear phase coefficient PC 0.03   n/a 39 autocmod 2.6i
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

[ show close-approach data ]
Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 1992.7       1992 XXV   1992l 
 1985.7   84P/1985 M1   1985 XV   1985g 
 1978.7   84P/1978 R2   1978 XXII   1978k 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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