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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 2455894.5 (2011-Nov-29.0) TDB
Reference: JPL 49 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4944679176981627 1.5024e-07  
a 3.640700259876713 2.682e-08 au
q 1.840490783412315 5.3875e-07 au
i 7.284293770723781 1.0876e-05 deg
node 112.3893362880986 5.1614e-05 deg
peri 276.4047896990754 5.9833e-05 deg
M 274.576887886136 1.593e-05 deg
tp 2456496.572377671349
(2013-Jul-23.07237767)
0.00011603 TDB
period 2537.323337889819
6.95
2.8038e-05
7.676e-08
d
yr
n .1418817990691704 1.5678e-09 deg/d
Q 5.44090973634111 4.0082e-08 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 5.691323711225799E-10 4.006E-11
A2 [EST] -2.330648857495716E-11 3.306E-13
  Orbit Determination Parameters
   # obs. used (total)      1745  
   data-arc span      15537 days (42.54 yr)  
   first obs. used      1978-09-03  
   last obs. used      2021-03-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .6615  
   source      ORB  
   producer      Davide Farnocchia  
   solution date      2021-Mar-29 10:00:09  

Additional Information
 Earth MOID = .861919 au 
 Jupiter MOID = .554602 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 14.2   1. 49 2 parameter fit from 806 observations, autocmod 2.9c
comet total magnitude slope K1 6.5   n/a 49 autocmod 2.9c
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 
 1985.8   84P/1985 M1   1985 XV   1985g 
 1978.8   84P/1978 R2   1978 XXII   1978k 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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