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88P/Howell
Classification: Jupiter-family Comet          SPK-ID: 1000046
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
:
Orbital Elements at Epoch 2457262.5 (2015-Aug-28.0) TDB
Reference: JPL K084/23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5630745770988455 1.7855e-07  
a 3.109288938679819 2.9043e-07 AU
q 1.358527384454562 6.3601e-07 AU
i 4.382612992282016 1.1452e-05 deg
node 56.69789733056319 0.00034989 deg
peri 235.9121331800193 0.00035149 deg
M 25.84558069957682 1.8031e-05 deg
tp 2457118.728155914842
(2015-Apr-06.22815591)
9.3268e-05 JED
period 2002.580807615761
5.48
0.00028059
7.682e-07
d
yr
n .1797680266538707 2.5188e-08 deg/d
Q 4.860050492905076 4.5397e-07 AU

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 8.596834349308887E-9 6.246E-11
A2 [EST] -9.518083866521969E-10 1.786E-11
A3 [EST] -3.835754397155956E-10 6.389E-11
DT [EST] 25.31139699895484 .6892
  Orbit Determination Parameters
   # obs. used (total)      1529  
   data-arc span      4159 days (11.39 yr)  
   first obs. used      2004-02-27  
   last obs. used      2015-07-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .75132  
   data source      ORB  
   producer      Ryan S. Park  
   solution date      2015-Aug-18 21:52:46  

Additional Information
 Earth MOID = .350022 AU 
 T_jup = 2.947 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 10.6 mag 1. K084/23 2 parameter fit from 401 observations, autocmod 2.6
comet total magnitude slope K1 13.   n/a K084/23 autocmod 2.6
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

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (AU) Minimum Distance (AU) Maximum Distance (AU) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1907-Jan-22 15:57 00:24 Jupiter 0.191623209455445 0.191561886495043 0.191684561683617 4.49216508607223 3.36735013145419 2417598.164618282 24.2435637121621 350.976544076296 45.4774548392491 -54.1576090468539 37146.2980391922 T K084/23 CATAB v2.0c-linF95 2015-Aug-18 22:02:02 2015-Aug-18 22:02
1978-Oct-13 19:12 00:04 Jupiter 0.580992101665595 0.580963556538981 0.58102064597375 4.86600693405315 4.55656051055466 2443795.300177054 3.50908661897604 164.039154994865 17.6161936864681 -16.3402173760676 116823.00111204 T K084/23 CATAB v2.0c-linF95 2015-Aug-18 22:02:02 2015-Aug-18 22:02
1990-Aug-22 13:11 00:03 Jupiter 0.527461504706602 0.52744998989988 0.527473019457021 4.80297852656347 4.45610912924011 2448126.049163586 2.70972974153784 56.2601479282679 14.2923925328114 -21.9614967425668 192312.626414533 T K084/23 CATAB v2.0c-linF95 2015-Aug-18 22:02:02 2015-Aug-18 22:02
2002-Jun-08 23:58 < 00:01 Jupiter 1.87719932378626 1.87719101536684 1.8772076321845 9.51124538205643 9.4636862037173 2452434.498672458 0.507817836418966 89.62778259876 19.9411406723388 -6.30401283163154 547606.525532525 T K084/23 CATAB v2.0c-linF95 2015-Aug-18 22:02:02 2015-Aug-18 22:02
2031-Sep-13 09:18 00:07 Mars 0.0744100323847809 0.0744010571323164 0.0744190107738861 6.38261776760323 6.3820149355083 2463122.887605536 7.15247736773759 660.607448738786 85.1981809746215 -61.9612472221023 90928.7631761158 T K084/23 CATAB v2.0c-linF95 2015-Aug-18 22:02:02 2015-Aug-18 22:02
2061-May-11 23:45 00:06 Jupiter 0.705930484330783 0.705845354214752 0.706015608953249 5.28403136383116 5.05185648592461 2473956.489675026 6.42814945859993 552.28976485043 89.015335360819 -18.5587976624327 36366.9623047877 T K084/23 CATAB v2.0c-linF95 2015-Aug-18 22:02:02 2015-Aug-18 22:02
2073-Apr-18 00:15 00:08 Jupiter 0.481828289316369 0.481815266279961 0.48184131245555 4.47583249262422 4.06413677659383 2478315.510565151 8.33338970200016 108.949515301822 42.6402369958907 -65.6590899103793 115821.277231444 T K084/23 CATAB v2.0c-linF95 2015-Aug-18 22:02:02 2015-Aug-18 22:02
2145-Mar-28 00:02 00:14 Jupiter 0.583280273465004 0.582883504792786 0.583676887947159 5.09497640462975 4.80150426308653 2504591.501258605 13.740219725063 2347.41299338936 78.6576551845853 -15.2375847472893 24188.3557856062 T K084/23 CATAB v2.0c-linF95 2015-Aug-18 22:02:02 2015-Aug-18 22:02
2157-Feb-08 16:17 00:36 Jupiter 0.5900362631457 0.589559969862855 0.590512377807861 5.21685184067166 4.93401021761444 2508927.178662039 35.6680878957645 2852.46287470556 83.1089493083964 -18.0207740357086 27988.4544348974 T K084/23 CATAB v2.0c-linF95 2015-Aug-18 22:02:02 2015-Aug-18 22:02
2170-Jul-21 04:15 06:49 Earth 0.393199994290538 0.392275693974994 0.394126944715403 3.45802616865003 3.4560659988898 2513837.677364863 408.998728690056 36531.8090307217 171.361798710314 24.8122632746751 42659.7625880254 T K084/23 CATAB v2.0c-linF95 2015-Aug-18 22:02:02 2015-Aug-18 22:02
2181-Jul-23 12:22 04:46 Earth 0.360800751414781 0.360136909897582 0.36146723756646 3.60163945657066 3.59958844380423 2517858.015373210 286.314583670775 28787.394491663 197.397035306702 31.3796953196464 43760.4686519273 T K084/23 CATAB v2.0c-linF95 2015-Aug-18 22:02:02 2015-Aug-18 22:02
2192-Jul-30 06:21 04:33 Earth 0.34163731964446 0.341269786148929 0.342007051531798 3.45266192906444 3.45040231051326 2521882.764853145 273.045428933526 14946.3280759107 370.122591510788 -62.6881539649874 36299.3345182145 T K084/23 CATAB v2.0c-linF95 2015-Aug-18 22:02:02 2015-Aug-18 22:02

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 | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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