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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 2456981.5 (2014-Nov-20.0) TDB
Reference: JPL K084/21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5629904901824762 4.8664e-07  
a 3.10880019469612 8.6192e-07 AU
q 1.358575249204774 1.7721e-06 AU
i 4.382619246688301 1.2081e-05 deg
node 56.69841663212579 0.00019846 deg
peri 235.9223559544946 0.00020717 deg
M 335.3218730415789 0.00019692 deg
tp 2457118.745254205697
(2015-Apr-06.24525421)
0.0011469 JED
period 2002.108652625718
5.48
0.00083263
2.28e-06
d
yr
n .1798104211416641 7.4779e-08 deg/d
Q 4.859025140187465 1.3472e-06 AU

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 8.436637214334332E-9 1.389E-10
A2 [EST] -3.215764109193913E-10 7.58E-11
A3 [EST] -1.349795417905266E-10 7.652E-11
DT [EST] 4.798815488344157 2.363
  Orbit Determination Parameters
   # obs. used (total)      1365  
   data-arc span      3827 days (10.48 yr)  
   first obs. used      2003-12-31  
   last obs. used      2014-06-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      1  
   fit RMS      .76448  
   data source      ORB  
   producer      Ryan S. Park  
   solution date      2014-Nov-10 13:32:30  

Additional Information
 Earth MOID = .3489 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. K084/21 2 parameter fit from 378 observations, autocmod 2.6
comet total magnitude slope K1 10.   n/a K084/21 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 (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 08:56 00:42 Jupiter 0.191953659994471 0.191861927323031 0.192045472957285 4.49115537886348 3.3682629665897 2417597.872318813 42.0665452316141 566.654684935815 129.308596754234 -58.7506066945907 13906.3702273615 T K084/21 CATAB v2.0c-linF95 2014-Nov-10 13:42:03 2014-Nov-10 13:42
1978-Oct-13 16:50 00:32 Jupiter 0.580541715217782 0.580328846152923 0.580754540708267 4.86454602453671 4.55475204110916 2443795.201220090 32.0261538567711 1184.38966574472 14.0217934734411 -15.3994444772373 129199.781880583 T K084/21 CATAB v2.0c-linF95 2014-Nov-10 13:42:03 2014-Nov-10 13:42
1990-Aug-22 12:08 00:16 Jupiter 0.52731755129962 0.527244840556484 0.527390257760159 4.80256534245197 4.45556539029327 2448126.005491682 16.0400708432855 393.961227078482 13.0087978223488 -19.6982827251491 159863.709006678 T K084/21 CATAB v2.0c-linF95 2014-Nov-10 13:42:03 2014-Nov-10 13:42
2002-Jun-09 00:00 < 00:01 Jupiter 1.87715197517842 1.87712328255464 1.87718066749843 9.51113824847822 9.46357732909601 2452434.500092766 0.860807716752666 334.894045740971 24.7405701248274 -5.64205400542881 217828.367094197 T K084/21 CATAB v2.0c-linF95 2014-Nov-10 13:42:03 2014-Nov-10 13:42
2031-Sep-13 16:27 01:22 Mars 0.0742046366982757 0.0740992640619803 0.0743104810036119 6.38410965799034 6.38350529847748 2463123.185452173 81.659399861587 7875.17143424276 117.878355624317 -62.1404588145492 65500.8574162162 T K084/21 CATAB v2.0c-linF95 2014-Nov-10 13:42:03 2014-Nov-10 13:42
2061-May-11 23:24 00:15 Jupiter 0.707126753931872 0.706561013509679 0.707692236587609 5.28748909905856 5.05587452190286 2473956.475100234 15.3174337414023 3716.01914080857 62.0487680220805 -17.3613518005928 43992.3947066427 T K084/21 CATAB v2.0c-linF95 2014-Nov-10 13:42:03 2014-Nov-10 13:42
2073-Apr-18 00:03 00:09 Jupiter 0.481883082467204 0.481855608740807 0.481910555329331 4.47572761712919 4.06407046150224 2478315.502115990 8.86007464446076 159.124174923224 48.0489126898232 -24.1114727047506 54273.5176390609 T K084/21 CATAB v2.0c-linF95 2014-Nov-10 13:42:03 2014-Nov-10 13:42
2145-Mar-28 03:07 01:15 Jupiter 0.585539104805751 0.584198703623512 0.58687773695806 5.10162465203085 4.80972314987376 2504591.630182353 75.135020058576 7677.96003577875 158.81231763625 -12.7371897347276 9995.33222974674 T K084/21 CATAB v2.0c-linF95 2014-Nov-10 13:42:03 2014-Nov-10 13:42
2157-Feb-08 10:53 01:30 Jupiter 0.58637105370636 0.584446994495872 0.588292218149314 5.20537930696274 4.92005500260632 2508926.953261720 89.7925594468461 11786.4292145738 132.07862116436 -19.361770177139 18680.1901284128 T K084/21 CATAB v2.0c-linF95 2014-Nov-10 13:42:03 2014-Nov-10 13:42
2170-Jul-20 12:10 1_08:21 Earth 0.40110465017312 0.396517179866195 0.405744740097802 3.45920100756881 3.45728013100211 2513837.006603343 1940.99890274881 178101.862028977 220.677351882009 23.5353307970088 32162.7057040304 T K084/21 CATAB v2.0c-linF95 2014-Nov-10 13:42:03 2014-Nov-10 13:42
2181-Jul-23 00:27 22:07 Earth 0.366348984929637 0.362964895490261 0.369785822107426 3.621280262579 3.61927128213006 2517857.518938052 1327.2644927775 141754.005702708 242.416464598196 29.6479039929518 34539.0367617189 T K084/21 CATAB v2.0c-linF95 2014-Nov-10 13:42:03 2014-Nov-10 13:42
2192-Jul-29 20:59 20:54 Earth 0.338965431386303 0.337454126430821 0.340530740309542 3.45451999853096 3.45224378846694 2521882.374121236 1254.4103530914 69661.4560722767 463.065434269735 -67.5470920588005 29955.2300689159 T K084/21 CATAB v2.0c-linF95 2014-Nov-10 13:42:03 2014-Nov-10 13:42

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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