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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 ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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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 
[ hide covariance matrix ]
Orbit Covariance (7×7)
  e q tp node peri i A2
e 7.019839317170953E-14 -2.60144034438809E-13 2.655108726285636E-12 -6.570404635382329E-13 -9.520630474743628E-12 -9.822911480137371E-13 -2.357601930638415E-19
q -2.60144034438809E-13 9.646553866290515E-13 -1.098128761579456E-11 2.448998760170281E-12 3.512828737971893E-11 3.654710889558456E-12 9.0947039690373E-19
tp 2.655108726285636E-12 -1.098128761579456E-11 4.990162832498842E-8 -6.550182375233263E-10 1.471003101714211E-8 -9.826832740419244E-10 1.723376424170529E-16
node -6.570404635382329E-13 2.448998760170281E-12 -6.550182375233263E-10 1.441982783349424E-9 -1.499690312618175E-9 -2.145383949714483E-10 -4.233469299795707E-20
peri -9.520630474743628E-12 3.512828737971893E-11 1.471003101714211E-8 -1.499690312618175E-9 7.341128918146912E-9 8.058280969854563E-11 1.057871854248094E-16
i -9.822911480137371E-13 3.654710889558456E-12 -9.826832740419244E-10 -2.145383949714483E-10 8.058280969854563E-11 7.638181758809398E-10 -7.061590974753401E-20
A2 -2.357601930638415E-19 9.0947039690373E-19 1.723376424170529E-16 -4.233469299795707E-20 1.057871854248094E-16 -7.061590974753401E-20 1.162439324906285E-23

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

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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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