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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 2456251.5 (2012-Nov-20.0) TDB
Reference: JPL 50 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4729919523404931 2.1531e-07  
a 3.669474902953501 3.5529e-08 au
q 1.933842804541083 7.8843e-07 au
i 10.97529382676345 2.2891e-05 deg
node 103.5748531955486 3.1647e-05 deg
peri 296.9463255581147 6.6558e-05 deg
M 325.6448200596468 2.3795e-05 deg
tp 2456496.515769102927
(2013-Jul-23.01576910)
0.00016821 TDB
period 2567.463684666904
7.03
3.7289e-05
1.021e-07
d
yr
n .1402161994149902 2.0365e-09 deg/d
Q 5.405107001365918 5.2335e-08 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A2 [EST] -1.665194402580553E-10 1.566E-12
  Orbit Determination Parameters
   # obs. used (total)      1034  
   data-arc span      7829 days (21.43 yr)  
   first obs. used      1999-10-10  
   last obs. used      2021-03-17  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .79645  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 23:27:46  

Additional Information
 Earth MOID = .970627 au 
 Jupiter MOID = .655065 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 50 2 parameter fit from 602 observations, autocmod 2.9c
comet total magnitude slope K1 10.   n/a 50 autocmod 2.9c
comet nuclear magnitude M2 15.9   0.7 50 from 364 observations, autocmod 2.9c
comet nuclear magnitude slope K2 5.   n/a 50 autocmod 2.9c
comet nuclear phase coefficient PC 0.03   n/a 50 autocmod 2.9c

[ 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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