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120P/Mueller 1
Classification: Jupiter-family Comet          SPK-ID: 1000116
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2453373.5 (2005-Jan-03.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .336662206520318 3.1132e-07  
a 4.140887466924998 8.5933e-07 au
q 2.746807155357698 1.6524e-06 au
i 8.787089100165726 3.4574e-05 deg
node 4.461100193933076 0.00014167 deg
peri 30.16639379641331 0.00024614 deg
M 11.09970705585699 9.8742e-05 deg
tp 2453278.604070186571
(2004-Sep-30.10407019)
0.00083773 TDB
period 3077.787058786194
8.43
0.00095807
2.623e-06
d
yr
n .116967156311969 3.641e-08 deg/d
Q 5.534967778492297 1.1486e-06 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] -3.417076078045493E-8 6.427E-9
A2 [EST] -1.538633138885035E-9 7.081E-11
  Orbit Determination Parameters
   # obs. used (total)      131  
   data-arc span      11991 days (32.83 yr)  
   first obs. used      1987-10-18  
   last obs. used      2020-08-16  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      1  
   norm. resid. RMS      .76739  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 23:27:36  

Additional Information
 Earth MOID = 1.7574 au 
 Jupiter MOID = .260279 au 
 T_jup = 2.917 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 4.3   01. 20 2 parameter fit from 67 observations, autocmod 2.9c
comet total magnitude slope K1 30.75   n/a 20 autocmod 2.9c
comet nuclear magnitude M2 16.4   1. 20 from 31 observations, autocmod 2.9c
comet nuclear magnitude slope K2 5.   n/a 20 autocmod 2.9c
comet nuclear phase coefficient PC 0.03   n/a 20 autocmod 2.9c
diameter diameter 3.0 km n/a Lamy,P.L.,Toth,I.,Fernandez,Y.R.,Weaver,H.A. (2004) Comets II, pp. 223-264  

120P/Mueller 1          Discovered 1987-Oct-18 by Mueller, Jean at Palomar Mountain Observatory, California
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
1906-Sep-20 05:52 13:29 Jupiter 1.40402085420955 1.40373166519715 1.40431037984308 2.99624453471282 2.78763599843274 2417473.744723737 809.34061188484 39507.9188327708 2136.21252646733 81.2279103426568 8262.71897215894 T 20 CATAB v2.0g-lin.ifort 2021-Apr-15 23:27:37 2021-Apr-15 23:27
1911-Feb-19 01:38 11:38 Jupiter 1.337689465693 1.33559551588699 1.33978387941708 3.97568781792571 3.81309550121866 2419086.568004117 697.955659649311 111991.793442695 13242.4680793364 28.8099070607495 5154.5377446235 T 20 CATAB v2.0g-lin.ifort 2021-Apr-15 23:27:37 2021-Apr-15 23:27
1957-Dec-24 21:13 01:37 Jupiter 0.267239658433089 0.267092773853595 0.26738664090135 3.72973092728886 2.75169852821243 2436197.383969758 97.2907994059565 12300.3982271993 834.480771350358 -46.4949020495567 50161.2182185204 T 20 CATAB v2.0g-lin.ifort 2021-Apr-15 23:27:37 2021-Apr-15 23:27
2014-Aug-03 23:09 00:25 Jupiter 1.79429574510228 1.7942672450546 1.79432424472617 2.93972492188059 2.77450076989049 2456873.464581264 24.9035232921725 703.246207719579 379.703066785206 25.0385747267858 44886.2006418977 T 20 CATAB v2.0g-lin.ifort 2021-Apr-15 23:27:37 2021-Apr-15 23:27
2018-Aug-02 05:05 00:28 Jupiter 1.09305309018323 1.09299823006325 1.09310795164821 4.68592398899907 4.51752752685174 2458332.711642199 27.917466016041 3371.29085037705 394.816774174315 40.2240399806517 193741.572657697 T 20 CATAB v2.0g-lin.ifort 2021-Apr-15 23:27:37 2021-Apr-15 23:27
2038-Oct-15 09:16 02:24 Jupiter 1.82030331097368 1.8201829324718 1.82042368625021 2.47420866972495 2.27839190397811 2465711.886233062 144.048309065883 8255.35637390572 1149.68775718194 84.2582778228175 16675.3757790286 T 20 CATAB v2.0g-lin.ifort 2021-Apr-15 23:27:37 2021-Apr-15 23:27
2042-Apr-05 10:43 02:23 Jupiter 1.09992651623613 1.09976568679585 1.10008735946241 4.85133043756967 4.68991078788137 2466979.946548375 142.980072873183 10173.5738233686 508.95539627859 41.8293883080534 123380.434675545 T 20 CATAB v2.0g-lin.ifort 2021-Apr-15 23:27:37 2021-Apr-15 23:27
2100-Mar-28 18:37 07:43 Jupiter 0.458946175236362 0.458656928614972 0.459235439169847 3.81775937049632 3.29910955710602 2488156.275738477 462.752790330176 20124.6517138465 12928.055903925 76.5918364062119 5253.55722301852 T 20 CATAB v2.0g-lin.ifort 2021-Apr-15 23:27:37 2021-Apr-15 23:27
2124-Jan-16 14:09 17:30 Jupiter 1.75402540142973 1.74816665388696 1.75988538766297 7.5196977642587 7.45520290199365 2496850.089605783 1049.61715775157 301362.144975302 6994.95759464275 16.5356359105471 6214.5129879319 T 20 CATAB v2.0g-lin.ifort 2021-Apr-15 23:27:37 2021-Apr-15 23:27
2184-Oct-20 11:56 1_03:49 Jupiter 0.432903512357867 0.432471934832464 0.43334494505951 3.5419902713496 2.9381080507294 2519042.996965381 1668.56352617198 131472.498448123 10568.2840389446 -87.1480721973014 9274.64953226711 T 20 CATAB v2.0g-lin.ifort 2021-Apr-15 23:27:37 2021-Apr-15 23:27

Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 1996.3   120P/1995 O2       
 1987.9   120P/1987 U2   1987 XXXI   1987a1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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