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111P/Helin-Roman-Crockett
Classification: Encke-type Comet          SPK-ID: 1000118
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2456320.5 (2013-Jan-28.0) TDB
Reference: JPL 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1096207704078609 5.5397e-07  
a 4.160365902658368 7.3931e-07 AU
q 3.704303387230362 2.0858e-06 AU
i 4.228807042165645 4.2346e-05 deg
node 89.79399820609125 0.00043835 deg
peri 3.37794152502789 0.00045992 deg
M 359.6946225231546 0.00017503 deg
tp 2456323.129239941113
(2013-Jan-30.62923994)
0.0015075 JED
period 3099.529109280249
8.49
0.00082619
2.262e-06
d
yr
n .1161466749649584 3.0959e-08 deg/d
Q 4.616428418086374 8.2035e-07 AU

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A2 [EST] -1.134125358309937E-7 5.669E-9
  Orbit Determination Parameters
   # obs. used (total)      137  
   data-arc span      8753 days (23.96 yr)  
   first obs. used      1989-01-03  
   last obs. used      2012-12-21  
   planetary ephem.      DE405  
   SB-pert. ephem.      SB405-CPV-2  
   condition code      1  
   fit RMS      .79086  
   data source      ORB  
   producer      Alan B. Chamberlin  
   solution date      2013-Jan-28 09:17:54  

Additional Information
 Earth MOID = 2.72099 AU 
 T_jup = 3.023 
[ 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 11.5 mag n/a ICQ 2005 Handbook  
comet total magnitude slope K1 10.0   n/a ICQ 2005 Handbook  
diameter diameter 1.2 km n/a Lamy,P.L.,Toth,I.,Fernandez,Y.R.,Weaver,H.A. (2004) Comets II, pp. 223-264  

111P/Helin-Roman-Crockett          Discovered 1989-Jan-02 by Helin, Eleanor at Palomar Mountain Observatory (675)
discovered on plate/photo taken on discovery date as well as 1/3,5
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
1941-Aug-15 11:28 2_14:58 Jupiter 0.53717962869831 0.526762787708847 0.548071861460084 0.897645587497619 n/a 2430221.978228360 3778.30799433221 957833.083286659 2743.1608261532 -56.2942116231446 24344.3703491741 F 8 CATAB v2.0c-linF95 2013-Jan-28 09:33:02 2013-Jan-28 09:33
1969-Oct-13 13:49 2_01:01 Jupiter 0.0573715165146647 0.0539826927013642 0.0607658187752961 4.98140488823608 n/a 2440508.075876800 2941.06231628125 171418.636650198 79.2492660744727 -9.36975443190704 16727.0499843181 F 8 CATAB v2.0c-linF95 2013-Jan-28 09:33:02 2013-Jan-28 09:33
1976-Apr-11 06:48 10:54 Jupiter 0.0116094284628845 0.0115344140419834 0.0116844479602058 11.855862569885 n/a 2442879.783661459 654.787942364257 3760.33030244278 29.131876769483 5.84326055655685 3637.33475253601 F 8 CATAB v2.0c-linF95 2013-Jan-28 09:33:02 2013-Jan-28 09:33
1979-Jul-18 09:11 01:20 Jupiter 0.211438367654726 0.211402259713154 0.211474475821059 2.11006758313742 n/a 2444072.882709119 80.8898780376754 1833.78895234544 263.389435961741 11.0393792434649 28335.3032128993 F 8 CATAB v2.0c-linF95 2013-Jan-28 09:33:02 2013-Jan-28 09:33
1980-Nov-17 02:43 00:32 Jupiter 0.201252030071494 0.201214263627742 0.201289796664358 2.20359407479875 n/a 2444560.613306318 32.8504896117595 1903.36052492954 262.533047833874 -8.41445607530371 22743.8713676091 F 8 CATAB v2.0c-linF95 2013-Jan-28 09:33:02 2013-Jan-28 09:33
1983-Aug-10 04:50 00:10 Jupiter 0.0629352169698534 0.0629312630924086 0.0629391708473248 4.7370808111291 n/a 2445556.701871739 10.7230110990785 197.188317708596 148.441186790629 -1.37034746336401 47392.7941242962 F 8 CATAB v2.0c-linF95 2013-Jan-28 09:33:02 2013-Jan-28 09:33
2011-Dec-16 05:27 00:25 Jupiter 1.13555177010055 1.13554989767761 1.13555364261044 2.08546777328763 1.69036988445829 2455911.727407744 25.0324269445703 26.2751614398973 19.3206084382183 33.7841435709593 251528.707479815 T 8 CATAB v2.0c-linF95 2013-Jan-28 09:33:02 2013-Jan-28 09:33
2040-Jan-26 12:19 01:47 Jupiter 1.40928252458974 1.40923727524233 1.4093277739539 2.4408909033372 2.18079947020425 2466180.013414239 107.116510893641 83.2493896053513 15.1493060079879 0.931669786551289 103365.19414039 T 8 CATAB v2.0c-linF95 2013-Jan-28 09:33:02 2013-Jan-28 09:33
2071-Apr-29 17:28 04:17 Jupiter 0.0361469723990201 0.0360857364981521 0.0362082112224501 6.47385549373439 n/a 2477596.227884708 257.039364299009 3096.39524070289 69.4438021065171 -9.53267181437323 11987.7313444265 F 8 CATAB v2.0c-linF95 2013-Jan-28 09:33:02 2013-Jan-28 09:33
2073-Mar-10 15:59 04:32 Jupiter 0.0387625108153797 0.0387581267838404 0.0387668954238585 6.22659533406786 n/a 2478277.166299330 272.917901786946 355.496490806734 118.20334738867 -56.7309464238672 41388.0261846003 F 8 CATAB v2.0c-linF95 2013-Jan-28 09:33:02 2013-Jan-28 09:33
2075-Dec-05 12:45 05:22 Jupiter 0.0681389982651812 0.0681256647496238 0.0681523340359699 4.42436922256881 n/a 2479277.031826292 322.975684789284 937.572086488751 235.443482849763 46.7462349095235 32103.926815612 F 8 CATAB v2.0c-linF95 2013-Jan-28 09:33:02 2013-Jan-28 09:33
2078-Apr-04 06:13 03:26 Jupiter 0.0759765106892416 0.0759400348242348 0.0760129923509376 4.17974202899766 n/a 2480127.759490349 206.159126245351 2102.29157755391 215.287707390814 30.2621187685663 26684.6163222468 F 8 CATAB v2.0c-linF95 2013-Jan-28 09:33:02 2013-Jan-28 09:33
2080-May-01 03:58 05:02 Jupiter 0.0583196266514326 0.0582424398632923 0.0583968160344796 4.87541985717298 n/a 2480885.665799120 302.71081845019 3897.71015915122 152.257438004705 9.06925985782963 8842.0472413633 F 8 CATAB v2.0c-linF95 2013-Jan-28 09:33:02 2013-Jan-28 09:33
2084-Jan-27 03:58 02:21 Jupiter 0.252822548869947 0.252597498223228 0.253047599963861 2.19842287212554 n/a 2482251.665841660 141.222939640707 11234.9845931583 941.819145240949 -2.72420920442062 3829.11006871863 F 8 CATAB v2.0c-linF95 2013-Jan-28 09:33:02 2013-Jan-28 09:33

Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 1987.6   111P/1989 A2   1988 XIII   1989b 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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