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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 2457380.5 (2015-Dec-24.0) TDB
Reference: JPL K084/24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5630633285248894 2.0274e-07  
a 3.108883474923954 1.7054e-07 au
q 1.358385197537248 6.1669e-07 au
i 4.382800476306492 9.3605e-06 deg
node 56.69816794312565 0.0001205 deg
peri 235.9016113272215 0.00012822 deg
M 47.06901291546103 1.6517e-05 deg
tp 2457118.719264519376
(2015-Apr-06.21926452)
7.9326e-05 JED
period 2002.189103525235
5.48
0.00016475
4.511e-07
d
yr
n .1798031960947901 1.4795e-08 deg/d
Q 4.85938175231066 2.6657e-07 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 8.494590620692732E-9 4.693E-11
A2 [EST] -9.603066991757068E-10 1.315E-11
A3 [EST] -5.923148980478362E-10 2.044E-11
DT [EST] 25.89113989679216 .4511
  Orbit Determination Parameters
   # obs. used (total)      2191  
   data-arc span      4283 days (11.73 yr)  
   first obs. used      2004-02-27  
   last obs. used      2015-11-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .67507  
   data source      ORB  
   producer      Ryan S. Park  
   solution date      2015-Dec-14 12:48:35  

Additional Information
 Earth MOID = .351327 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 9.7 mag 2. K084/24 2 parameter fit from 527 observations, autocmod 2.6
comet total magnitude slope K1 14.   n/a K084/24 autocmod 2.6
comet nuclear magnitude M2 14.0 mag 01. K084/24 from 1374 observations, autocmod 2.6
comet nuclear magnitude slope K2 5.   n/a K084/24 autocmod 2.6
comet nuclear phase coefficient PC 0.03   n/a K084/24 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 16:13 00:16 Jupiter 0.191604751578806 0.191570241007375 0.191639272679934 4.49218214383743 3.36724643114164 2417598.175645655 16.2681465073394 207.930006013404 26.7911110877178 -55.4462552589265 64069.4634385281 T K084/24 CATAB v2.0c-linF95 2015-Dec-14 12:52:05 2015-Dec-14 12:52
1978-Oct-13 19:08 00:03 Jupiter 0.580987375771472 0.580963483917368 0.581011267051828 4.86598808308777 4.55653777677475 2443795.297004668 3.3665850899182 135.750958527803 12.7360445985857 -15.7798792242176 154242.335936291 T K084/24 CATAB v2.0c-linF95 2015-Dec-14 12:52:05 2015-Dec-14 12:52
1990-Aug-22 13:08 00:02 Jupiter 0.527460389837555 0.527449227583646 0.527471552033872 4.80296844523149 4.45609750146299 2448126.046969864 2.39348014976862 54.5813481526356 11.518795350451 -20.9767940104011 220044.139931426 T K084/24 CATAB v2.0c-linF95 2015-Dec-14 12:52:05 2015-Dec-14 12:52
2002-Jun-08 23:57 < 00:01 Jupiter 1.87719602270123 1.87718825399444 1.87720379138952 9.51123417355034 9.46367485503951 2452434.498188180 0.391965394485562 83.8604448082158 18.9998517821161 -5.75984863806121 574498.868988815 T K084/24 CATAB v2.0c-linF95 2015-Dec-14 12:52:05 2015-Dec-14 12:52
2031-Sep-13 09:14 00:07 Mars 0.0744115637473671 0.0744039932816011 0.0744191368158685 6.38260942523287 6.3820066047566 2463122.884611828 6.8100046813206 581.772554389905 63.8903723466793 -63.9204560663901 123281.897724926 T K084/24 CATAB v2.0c-linF95 2015-Dec-14 12:52:05 2015-Dec-14 12:52
2061-May-11 23:56 00:05 Jupiter 0.70588887355407 0.705820839934325 0.705956903388795 5.28391775640594 5.05172365606681 2473956.497131557 5.37617967642233 457.754323051952 30.4722481429392 -18.1630224572303 95309.4121272762 T K084/24 CATAB v2.0c-linF95 2015-Dec-14 12:52:05 2015-Dec-14 12:52
2073-Apr-18 00:20 00:07 Jupiter 0.481836193142281 0.481823187021664 0.48184919933403 4.47588534645153 4.06420207964043 2478315.514184035 6.70961824276144 53.1957673762334 24.1824746459856 -37.164755960916 155074.257530311 T K084/24 CATAB v2.0c-linF95 2015-Dec-14 12:52:05 2015-Dec-14 12:52
2145-Mar-27 23:56 00:09 Jupiter 0.582915664659614 0.582619578506326 0.583211660471191 5.09388951519612 4.80016170319568 2504591.497550843 9.27618588507859 1758.60566407541 42.5826284981647 -14.3697980421876 41922.1501331 T K084/24 CATAB v2.0c-linF95 2015-Dec-14 12:52:05 2015-Dec-14 12:52
2157-Feb-08 17:27 00:27 Jupiter 0.590490421014496 0.590145964758089 0.590834790629874 5.21827934984946 4.93574323505212 2508927.227128430 26.9859939728021 2060.72311669439 35.2548371302665 -18.9995381683175 69411.3581985569 T K084/24 CATAB v2.0c-linF95 2015-Dec-14 12:52:05 2015-Dec-14 12:52
2170-Jul-21 06:06 04:43 Earth 0.39232348581049 0.391696842760022 0.392951433179846 3.45756884836833 3.45560403806354 2513837.753833011 282.649494018037 24965.8005394079 98.7874100262214 25.1956790128314 74892.4961068274 T K084/24 CATAB v2.0c-linF95 2015-Dec-14 12:52:05 2015-Dec-14 12:52
2181-Jul-23 13:46 03:21 Earth 0.360187135866228 0.359736959815192 0.360638627934549 3.59919946626544 3.59714356479254 2517858.073277810 200.683051713959 19787.8184231887 109.656213713013 31.9135874756696 79789.1270110508 T K084/24 CATAB v2.0c-linF95 2015-Dec-14 12:52:05 2015-Dec-14 12:52
2192-Jul-30 07:27 03:17 Earth 0.341957944030908 0.34168867734677 0.342228272089559 3.45230392849264 3.45004619502974 2521882.810735956 196.531182384505 10651.014565376 171.096822190456 -60.9015762675522 77282.9360286899 T K084/24 CATAB v2.0c-linF95 2015-Dec-14 12:52:05 2015-Dec-14 12:52

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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