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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 
[ hide covariance matrix ]
Orbit Covariance (8×8)
  e q tp node peri i A1 A2
e 9.691811296023647E-14 -4.911385259908497E-13 4.789613361961753E-12 1.602156812829598E-12 -1.714500519063782E-12 -3.368902668162329E-13 9.205407947182722E-16 -1.115118925373795E-17
q -4.911385259908497E-13 2.730577838626139E-12 7.639668184306582E-11 -1.110213283939294E-11 4.03053531891479E-11 4.364600001193621E-13 -7.441801271496775E-15 6.568094878331667E-17
tp 4.789613361961753E-12 7.639668184306582E-11 7.017993314376815E-7 -7.49982443468275E-9 1.688378240119064E-7 -4.302921267771096E-10 -1.250196954504257E-12 2.420353558938006E-15
node 1.602156812829598E-12 -1.110213283939294E-11 -7.49982443468275E-9 2.007140538766878E-8 -2.142338138731256E-8 1.295949068711069E-9 5.492587514605769E-14 6.784196624550469E-17
peri -1.714500519063782E-12 4.03053531891479E-11 1.688378240119064E-7 -2.142338138731256E-8 6.058487145603278E-8 -1.460855605745311E-9 -4.100447881665847E-13 1.679254025932079E-15
i -3.368902668162329E-13 4.364600001193621E-13 -4.302921267771096E-10 1.295949068711069E-9 -1.460855605745311E-9 1.19535425808432E-9 1.095757321127287E-14 -9.84960964749127E-17
A1 9.205407947182722E-16 -7.441801271496775E-15 -1.250196954504257E-12 5.492587514605769E-14 -4.100447881665847E-13 1.095757321127287E-14 4.13055881912511E-17 -1.881802238831841E-19
A2 -1.115118925373795E-17 6.568094878331667E-17 2.420353558938006E-15 6.784196624550469E-17 1.679254025932079E-15 -9.84960964749127E-17 -1.881802238831841E-19 5.014322533141853E-21

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

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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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