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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.


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:
Orbital Elements at Epoch 2457327.5 (2015-Nov-01.0) TDB
Reference: JPL K203/12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5630690623267989 5.4781e-08  
a 3.109131839869366 1.118e-07 au
q 1.358475890143727 2.1025e-07 au
i 4.38280258278703 8.994e-06 deg
node 56.69810353471465 8.3852e-05 deg
peri 235.9077897189298 8.5217e-05 deg
M 37.53413481456568 1.1814e-05 deg
tp 2457118.723773799648
(2015-Apr-06.22377380)
7.3365e-05 TDB
period 2002.429037020456
5.48
0.00010801
2.957e-07
d
yr
n .1797816518560215 9.6974e-09 deg/d
Q 4.859787789595004 1.7476e-07 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 8.060510488735504E-9 4.154E-11
A2 [EST] -7.109506866715717E-10 1.061E-11
A3 [EST] -6.224435624689887E-10 2.207E-11
DT [EST] 35.06929290647015 .5488
  Orbit Determination Parameters
   # obs. used (total)      3258  
   data-arc span      4339 days (11.88 yr)  
   first obs. used      2008-12-30  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60618  
   source      ORB  
   producer      Davide Farnocchia  
   solution date      2020-Nov-17 10:17:07  

Additional Information
 Earth MOID = .350768 au 
 Jupiter MOID = .463956 au 
 T_jup = 2.947 
[ 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 12.2   1. K203/12 2 parameter fit from 1364 observations, autocmod 2.9a
comet total magnitude slope K1 9.   n/a K203/12 autocmod 2.9a
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 
 1987.8   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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