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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 ]

[ show orbit diagram ]
:
Orbital Elements at Epoch 2457408.5 (2016-Jan-21.0) TDB
Reference: JPL K203/14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5630745112078982 4.5186e-08  
a 3.10882988507007 6.481e-08 au
q 1.358327017105734 1.643e-07 au
i 4.382957683372297 8.7788e-06 deg
node 56.69768323440714 8.3881e-05 deg
peri 235.8993210774943 8.5176e-05 deg
M 52.10488566886495 1.1277e-05 deg
tp 2457118.719064191099
(2015-Apr-06.21906419)
6.9056e-05 TDB
period 2002.137334187473
5.48
6.2608e-05
1.714e-07
d
yr
n .1798078452725615 5.6227e-09 deg/d
Q 4.859332753034406 1.013e-07 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 8.033492841311949E-9 3.992E-11
A2 [EST] -7.274216513493459E-10 8.659E-12
A3 [EST] -6.437643760745283E-10 2.187E-11
DT [EST] 35.76299289646545 .4866
  Orbit Determination Parameters
   # obs. used (total)      3399  
   data-arc span      4408 days (12.07 yr)  
   first obs. used      2008-12-30  
   last obs. used      2021-01-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60787  
   source      ORB  
   producer      Davide Farnocchia  
   solution date      2021-Feb-01 11:45:56  

Additional Information
 Earth MOID = .351066 au 
 Jupiter MOID = .464699 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. K203/14 2 parameter fit from 1466 observations, autocmod 2.9a
comet total magnitude slope K1 9.5   n/a K203/14 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 
 1987.9   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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