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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 2456717.5 (2014-Mar-01.0) TDB
Reference: JPL K084/19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5628121683519959 2.5178e-07  
a 3.109132053377951 1.0161e-06 AU
q 1.359274700723613 8.8341e-07 AU
i 4.382272107300784 1.369e-05 deg
node 56.70775153452693 0.00020367 deg
peri 235.8912654624358 0.00020512 deg
M 287.8539121124742 0.00014512 deg
tp 2457118.798433818312
(2015-Apr-06.29843382)
0.0010037 JED
period 2002.429243285012
5.48
0.00098161
2.688e-06
d
yr
n .1797816333372236 8.8131e-08 deg/d
Q 4.85898940603229 1.588e-06 AU

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 7.252427776242953E-9 9.57E-11
A2 [EST] 2.544257584061383E-10 4.367E-11
A3 [EST] 6.876825319845981E-11 8.255E-11
DT [EST] -14.53973369945246 1.805
  Orbit Determination Parameters
   # obs. used (total)      1323  
   data-arc span      4027 days (11.03 yr)  
   first obs. used      2003-01-31  
   last obs. used      2014-02-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      1  
   fit RMS      .79825  
   data source      ORB  
   producer      Ryan S. Park  
   solution date      2014-Feb-19 12:23:15  

Additional Information
 Earth MOID = .349062 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. K084/19 2 parameter fit from 335 observations, autocmod 2.5c
comet total magnitude slope K1 10.   n/a K084/19 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 09:25 00:59 Jupiter 0.191874155164788 0.191742404898455 0.192006028890728 4.49065225709425 3.36704909858817 2417597.892282771 59.486194566682 761.777937832483 79.0337575057448 -51.7371824859718 20673.1143253768 T K084/19 CATAB v2.0c-linF95 2014-Feb-19 12:32:01 2014-Feb-19 12:32
1978-Oct-13 12:33 00:23 Jupiter 0.579879987597889 0.579725805936142 0.580034143977784 4.86220861597942 4.5518898103091 2443795.022849616 23.3228972580149 883.707330493853 32.2738753327257 -15.0075867600183 55081.0564815242 T K084/19 CATAB v2.0c-linF95 2014-Feb-19 12:32:01 2014-Feb-19 12:32
1990-Aug-22 09:58 00:11 Jupiter 0.527103874906604 0.527059375509736 0.527148372155746 4.80175095501425 4.4545413912754 2448125.915050437 11.1470996878574 256.045706853676 25.6159570436438 -18.0469891974612 77674.3766314239 T K084/19 CATAB v2.0c-linF95 2014-Feb-19 12:32:01 2014-Feb-19 12:32
2002-Jun-08 23:52 < 00:01 Jupiter 1.87707415617406 1.87705832710181 1.87708998514978 9.51088198263135 9.46331779853314 2452434.494683771 0.74481650554004 188.301340505535 32.9442821359489 -5.66209951381498 268361.858337519 T K084/19 CATAB v2.0c-linF95 2014-Feb-19 12:32:01 2014-Feb-19 12:32
2031-Sep-14 05:48 01:14 Mars 0.0738572373475417 0.0737689466233827 0.0739458919417316 6.38778249714187 6.38717564395362 2463123.741460566 73.6139431560214 6770.47799893636 198.076355609579 -63.5705358732908 39309.4992908261 T K084/19 CATAB v2.0c-linF95 2014-Feb-19 12:32:01 2014-Feb-19 12:32
2061-May-11 23:14 00:09 Jupiter 0.709007268189429 0.708489256131572 0.709525053919163 5.2936297938467 5.06292373009047 2473956.467963391 9.41431776606546 3490.71264308156 29.3474405155586 -17.38182524803 93381.2274719351 T K084/19 CATAB v2.0c-linF95 2014-Feb-19 12:32:01 2014-Feb-19 12:32
2073-Apr-17 23:56 00:12 Jupiter 0.481928784381244 0.481910188137401 0.481947380859589 4.476235137089 4.06467039158 2478315.497183261 11.9814092415513 97.6885248685828 36.553011664745 -31.3409073488872 88733.3494156969 T K084/19 CATAB v2.0c-linF95 2014-Feb-19 12:32:01 2014-Feb-19 12:32
2145-Mar-28 11:00 01:18 Jupiter 0.590417696190231 0.588632365294019 0.592199867130321 5.11623452900934 4.82769347519713 2504591.958618225 78.319981345814 10424.6500985127 167.967302146168 -13.4661628129924 10101.3671344781 T K084/19 CATAB v2.0c-linF95 2014-Feb-19 12:32:01 2014-Feb-19 12:32
2157-Feb-08 01:37 02:11 Jupiter 0.579608173214042 0.577368841205132 0.581843664054934 5.18433596181596 4.89434342600018 2508926.567290938 131.063872560549 13512.8063074586 149.259457702241 -19.4159317594357 16311.1435314545 T K084/19 CATAB v2.0c-linF95 2014-Feb-19 12:32:01 2014-Feb-19 12:32
2170-Jul-19 02:06 1_15:55 Earth 0.418229269965338 0.412488903065383 0.424032757514915 3.4432902880005 3.44143956669481 2513835.587531178 2394.78899017971 220026.221408745 155.107110113975 20.7742937860615 42199.208026721 T K084/19 CATAB v2.0c-linF95 2014-Feb-19 12:32:01 2014-Feb-19 12:32
2181-Jul-21 22:27 1_02:29 Earth 0.37935295975671 0.374872003959111 0.383894553641486 3.65550337088436 3.65358144837226 2517856.435084256 1588.59642128731 181241.486790355 166.311747053704 25.7868593408336 46233.549359387 T K084/19 CATAB v2.0c-linF95 2014-Feb-19 12:32:01 2014-Feb-19 12:32
2192-Jul-29 00:56 23:28 Earth 0.334560137644131 0.333500373109092 0.335699708215786 3.4618346347118 3.45953331890508 2521881.538690333 1407.8894544767 75790.1354382726 349.245494153543 -81.610901145019 42045.1434257097 T K084/19 CATAB v2.0c-linF95 2014-Feb-19 12:32:01 2014-Feb-19 12:32

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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