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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 2456799.5 (2014-May-22.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4950370873283377 2.1787e-07  
a 3.64129988065612 4.3498e-08 AU
q 1.838721393647091 7.9827e-07 AU
i 7.287140451452368 1.2081e-05 deg
node 112.3813030815116 6.5231e-05 deg
peri 276.4703221093038 8.1826e-05 deg
M 42.93772433397255 1.6866e-05 deg
tp 2456496.794982357683
(2013-Jul-23.29498236)
0.00011661 JED
period 2537.950206760573
6.95
4.5476e-05
1.245e-07
d
yr
n .1418467545348347 2.5417e-09 deg/d
Q 5.443878367665149 6.5031e-08 AU

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A2 [EST] -2.254523752598398E-11 3.549E-13
  Orbit Determination Parameters
   # obs. used (total)      1236  
   data-arc span      12977 days (35.53 yr)  
   first obs. used      1978-09-11  
   last obs. used      2014-03-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .70379  
   data source      ORB  
   producer      Ryan S. Park  
   solution date      2014-May-12 11:48:01  

Additional Information
 Earth MOID = .860158 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. 38 from 352 observations, assumed slope, autocmod 2.5c
comet total magnitude slope K1 15.   n/a 38 autocmod 2.5c
comet nuclear magnitude M2 15.3 mag 0.8 38 from 676 observations, autocmod 2.5c
comet nuclear magnitude slope K2 5.   n/a 38 autocmod 2.5c
comet nuclear phase coefficient PC 0.03   n/a 38 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

[ 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 | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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