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

[ show orbit diagram ]
Orbital Elements at Epoch 2456134.5 (2012-Jul-26.0) TDB
Reference: JPL 47 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4730229634679645 2.1602e-07  
a 3.670265316249794 3.6176e-08 au
q 1.93414553964363 7.9129e-07 au
i 10.97467282437022 2.3677e-05 deg
node 103.573686092311 3.2733e-05 deg
peri 296.926775855707 6.7205e-05 deg
M 309.2613677481978 2.4131e-05 deg
tp 2456496.476912601373
(2013-Jul-22.97691260)
0.00016983 TDB
period 2568.293285672192
7.03
3.7971e-05
1.04e-07
d
yr
n .1401709072746255 2.0724e-09 deg/d
Q 5.406385092855957 5.3288e-08 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A2 [EST] -1.668229293726916E-10 1.579E-12
  Orbit Determination Parameters
   # obs. used (total)      989  
   data-arc span      7775 days (21.29 yr)  
   first obs. used      1999-10-10  
   last obs. used      2021-01-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .80755  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jan-30 21:13:01  

Additional Information
 Earth MOID = .971304 au 
 Jupiter MOID = .654727 au 
 T_jup = 2.871 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 13.6   0.6 47 2 parameter fit from 560 observations, autocmod 2.8
comet total magnitude slope K1 10.   n/a 47 autocmod 2.8
comet nuclear magnitude M2 15.9   0.7 47 from 364 observations, autocmod 2.8
comet nuclear magnitude slope K2 5.   n/a 47 autocmod 2.8
comet nuclear phase coefficient PC 0.03   n/a 47 autocmod 2.8

[ 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 | Mission Design | Physical Parameters | Close-Approach Data ]
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