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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 2456799.5 (2014-May-22.0) TDB
Reference: JPL K084/20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5629100172091527 2.1184e-07  
a 3.108888642851917 6.892e-07 AU
q 1.358864083402805 8.7594e-07 AU
i 4.382416613666521 1.2705e-05 deg
node 56.70223680538571 0.00019845 deg
peri 235.9086296086273 0.00019997 deg
M 302.5951801120339 0.00010439 deg
tp 2457118.765531824407
(2015-Apr-06.26553182)
0.00068649 JED
period 2002.194095915641
5.48
0.00066579
1.823e-06
d
yr
n .1798027477627563 5.979e-08 deg/d
Q 4.85891320230103 1.0772e-06 AU

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 7.270910281441204E-9 9.519E-11
A2 [EST] 2.536570658238161E-10 4.361E-11
A3 [EST] -2.724429881280078E-11 7.854E-11
DT [EST] -15.50959785270009 1.786
  Orbit Determination Parameters
   # obs. used (total)      1358  
   data-arc span      4085 days (11.18 yr)  
   first obs. used      2003-01-31  
   last obs. used      2014-04-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      1  
   fit RMS      .79448  
   data source      ORB  
   producer      Ryan S. Park  
   solution date      2014-May-12 11:47:01  

Additional Information
 Earth MOID = .349907 AU 
 T_jup = 2.948 
[ 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 12.0 mag 1. K084/20 2 parameter fit from 366 observations, autocmod 2.5c
comet total magnitude slope K1 10.   n/a K084/20 autocmod 2.5c
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 (675)
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 06:54 00:38 Jupiter 0.191977476926645 0.191885272811199 0.192069747307752 4.49062881439602 3.36772338495392 2417597.787827078 38.1486305397844 531.205834594612 75.8755115040836 -53.7280162362343 22199.3019681336 T K084/20 CATAB v2.0c-linF95 2014-May-12 11:52:04 2014-May-12 11:52
1978-Oct-13 13:11 00:18 Jupiter 0.579980785006616 0.579857767779279 0.580103787348574 4.86263635868466 4.55240247503775 2443795.049051558 18.3601617177115 689.88035202911 30.027293052149 -15.4737461443429 61284.0656565423 T K084/20 CATAB v2.0c-linF95 2014-May-12 11:52:04 2014-May-12 11:52
1990-Aug-22 10:15 00:09 Jupiter 0.527124763518908 0.527084540342097 0.527164985282065 4.80190024123702 4.45471660793491 2448125.926773850 9.14376288042144 219.734617414916 22.7325967268749 -19.2638572298475 93110.651455814 T K084/20 CATAB v2.0c-linF95 2014-May-12 11:52:04 2014-May-12 11:52
2002-Jun-08 23:54 < 00:01 Jupiter 1.87707605747077 1.87706026279762 1.87709185205135 9.51090890629551 9.46334490581851 2452434.495674662 0.640149089345544 183.897502170295 33.1793871078963 -5.42487834257197 270340.542489124 T K084/20 CATAB v2.0c-linF95 2014-May-12 11:52:04 2014-May-12 11:52
2031-Sep-14 02:53 00:49 Mars 0.0739246878060873 0.0738614377258726 0.0739881117239441 6.3867824197693 6.3861760253664 2463123.619887836 49.3441147170497 4752.08635694662 142.877025390538 -62.5112215979891 54033.083179962 T K084/20 CATAB v2.0c-linF95 2014-May-12 11:52:04 2014-May-12 11:52
2061-May-11 23:48 00:09 Jupiter 0.708588023660077 0.708240754967947 0.708935194528657 5.29203054355806 5.06111192397036 2473956.491910135 9.19465154377085 2298.98108219079 25.8278847143706 -17.4437340186965 106415.873520997 T K084/20 CATAB v2.0c-linF95 2014-May-12 11:52:04 2014-May-12 11:52
2073-Apr-18 00:33 00:08 Jupiter 0.481953853510909 0.481939043728053 0.481968663085176 4.47596856299966 4.0643993170707 2478315.522910466 7.89276595187132 89.287731283663 23.2448242540666 -22.531015639062 102759.349827031 T K084/20 CATAB v2.0c-linF95 2014-May-12 11:52:04 2014-May-12 11:52
2145-Mar-28 09:26 00:48 Jupiter 0.588812459298329 0.587860242578567 0.589763777644747 5.11133043294168 4.82168488713037 2504591.892902596 48.2162173931196 5504.76994839917 150.226967341122 -12.9231957290187 10842.5986885504 T K084/20 CATAB v2.0c-linF95 2014-May-12 11:52:04 2014-May-12 11:52
2157-Feb-08 05:29 01:08 Jupiter 0.581559762279009 0.580276795796996 0.582841460513059 5.19033935919921 4.90170265938817 2508926.728746095 67.7652854464622 7808.34118919208 139.370175607611 -19.5762733073251 17707.5236728009 T K084/20 CATAB v2.0c-linF95 2014-May-12 11:52:04 2014-May-12 11:52
2170-Jul-19 11:49 22:46 Earth 0.413365857628468 0.410069754894524 0.416683601978029 3.45035988538147 3.44849122241991 2513835.992625980 1366.14750228428 126087.487156184 154.320601973049 21.4828768910558 43366.6706413389 T K084/20 CATAB v2.0c-linF95 2014-May-12 11:52:04 2014-May-12 11:52
2181-Jul-22 05:57 15:11 Earth 0.375565302924949 0.37303345592543 0.378118250520313 3.64701060562154 3.64506477183259 2517856.747679827 911.327432456773 102567.760431332 165.571999540097 26.783307527497 47525.5542199314 T K084/20 CATAB v2.0c-linF95 2014-May-12 11:52:04 2014-May-12 11:52
2192-Jul-29 06:34 13:41 Earth 0.33559165928778 0.334858284337309 0.336351404547792 3.45907242743159 3.45677635435937 2521881.773676792 820.980384468818 44599.1033320319 338.675902572672 -77.5225429215702 42891.6570571559 T K084/20 CATAB v2.0c-linF95 2014-May-12 11:52:04 2014-May-12 11:52

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