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178P/Hug-Bell
Classification: Jupiter-family Comet          SPK-ID: 1000283
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2456981.5 (2014-Nov-20.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .473842542348582 8.5007e-07  
a 3.668188678565818 1.7233e-07 AU
q 1.930044829299906 3.1409e-06 AU
i 10.97210302191461 2.7871e-05 deg
node 103.5560318015271 3.793e-05 deg
peri 296.8144267572273 0.00021301 deg
M 68.05002437485736 4.8675e-05 deg
tp 2456496.433021640194
(2013-Jul-22.93302164)
0.00033517 JED
period 2566.113881864369
7.03
0.00018083
4.951e-07
d
yr
n .1402899546057745 9.8862e-09 deg/d
Q 5.406332527831731 2.5399e-07 AU

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A2 [EST] -2.11056231258981E-10 3.429E-12
  Orbit Determination Parameters
   # obs. used (total)      653  
   data-arc span      5305 days (14.52 yr)  
   first obs. used      1999-10-10  
   last obs. used      2014-04-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .74457  
   data source      ORB  
   producer      Ryan S. Park  
   solution date      2014-Nov-10 13:45:19  

Additional Information
 Earth MOID = .966966 AU 
 T_jup = 2.870 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 13.8 mag 0.6 34 2 parameter fit from 244 observations, autocmod 2.6
comet total magnitude slope K1 10.   n/a 34 autocmod 2.6
comet nuclear magnitude M2 15.9 mag 0.7 34 from 359 observations, autocmod 2.6
comet nuclear magnitude slope K2 5.   n/a 34 autocmod 2.6
comet nuclear phase coefficient PC 0.03   n/a 34 autocmod 2.6

[ show close-approach data ]
Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 2006.5   178P/2006 O1       
 1999.5   178P/1999 X1       
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]
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