Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
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 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3366622059716981 3.1132e-07  
a 4.140887475241521 8.5933e-07 au
q 2.746807163146135 1.6524e-06 au
i 8.787089092328669 3.4574e-05 deg
node 4.461100199142281 0.00014167 deg
peri 30.16639360979399 0.00024614 deg
M 11.09970713614999 9.8742e-05 deg
tp 2453278.604069214231
(2004-Sep-30.10406921)
0.00083773 TDB
period 3077.787068058297
8.43
0.00095807
2.623e-06
d
yr
n .1169671559595952 3.641e-08 deg/d
Q 5.534967787336907 1.1486e-06 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] -3.422548508644308E-8 6.427E-9
A2 [EST] -1.539398941494141E-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.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      1  
   norm. resid. RMS      .76741  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 11:21:09  

Additional Information
 Earth MOID = 1.7574 au 
 Jupiter MOID = .26028 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. 19 2 parameter fit from 67 observations, autocmod 2.8
comet total magnitude slope K1 30.75   n/a 19 autocmod 2.8
comet nuclear magnitude M2 16.4   1. 19 from 31 observations, autocmod 2.8
comet nuclear magnitude slope K2 5.   n/a 19 autocmod 2.8
comet nuclear phase coefficient PC 0.03   n/a 19 autocmod 2.8
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

[ show close-approach data ]
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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Apr-15 06:30 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin