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JPL Small-Body Database Browser
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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 2454952.5 (2009-May-01.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4716004271612915 2.6495e-07  
a 3.676132121372456 4.8807e-08 au
q 1.942466642631861 9.8217e-07 au
i 10.96355690847269 2.7637e-05 deg
node 103.6321984508248 3.7973e-05 deg
peri 296.7587117498244 8.568e-05 deg
M 143.9228534579123 3.0758e-05 deg
tp 2453923.270194435096
(2006-Jul-06.77019444)		 0.00022339 TDB
period 2574.45375144482
7.05		 5.127e-05
1.404e-07		 d
yr
n .1398354892947535 2.7848e-09 deg/d
Q 5.409797600113051 7.1824e-08 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A2 [EST] -2.126421574315704E-10 3.409E-12
   Orbit Determination Parameters
   # obs. used (total)      657  
   data-arc span      7294 days (19.97 yr)  
   first obs. used      1999-10-10  
   last obs. used      2019-09-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .71952  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 02:08:47  

Additional Information
 Earth MOID = .97887 au 
 Jupiter MOID = .650455 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 13.5   0.6 38 2 parameter fit from 250 observations, autocmod 2.8
comet total magnitude slope K1 11.   n/a 38 autocmod 2.8
comet nuclear magnitude M2 15.9   0.7 38 from 361 observations, autocmod 2.8
comet nuclear magnitude slope K2 5.   n/a 38 autocmod 2.8
comet nuclear phase coefficient PC 0.03   n/a 38 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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