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88P/Howell
Classification: Jupiter-family Comet          SPK-ID: 1000046
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | 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.


:
Orbital Elements at Epoch 2457411.5 (2016-Jan-24.0) TDB
Reference: JPL K203/15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5630753725404981 4.5031e-08  
a 3.108820472286132 6.4377e-08 au
q 1.358320226692091 1.6363e-07 au
i 4.382964465049785 8.7544e-06 deg
node 56.69767148145158 8.3751e-05 deg
peri 235.8990052901337 8.5036e-05 deg
M 52.6445471785883 1.1209e-05 deg
tp 2457118.719070410633
(2015-Apr-06.21907041)
6.8671e-05 TDB
period 2002.128241213956
5.48
6.219e-05
1.703e-07
d
yr
n .1798086618975616 5.5852e-09 deg/d
Q 4.859320717880173 1.0063e-07 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 8.036450100736789E-9 3.971E-11
A2 [EST] -7.268207253508337E-10 8.598E-12
A3 [EST] -6.441935977366771E-10 2.186E-11
DT [EST] 35.7283196886786 .4832
  Orbit Determination Parameters
   # obs. used (total)      3406  
   data-arc span      4434 days (12.14 yr)  
   first obs. used      2008-12-30  
   last obs. used      2021-02-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60777  
   source      ORB  
   producer      Davide Farnocchia  
   solution date      2021-Mar-19 11:22:37  

Additional Information
 Earth MOID = .351379 au 
 Jupiter MOID = .464722 au 
 T_jup = 2.948 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 12.0   1. K203/15 2 parameter fit from 1469 observations, autocmod 2.9b
comet total magnitude slope K1 9.5   n/a K203/15 autocmod 2.9b
diameter diameter 4.4 km n/a Scotti,J (1994) BAAS 26:1375  

88P/Howell          Discovered 1981-Aug-29 by Howell, Ellen at Palomar Mountain Observatory, California
discovered on plate/photo taken on discovery date as well as 8/30
Reference: comet.disLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 1993.3       1993 II   1992c 
 1987.9   88P/1987 E1   1987 VI   1987h 
 1982.4   88P/1981 Q1   1981 X   1981k 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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