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JPL Small-Body Database Browser
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3231 Mila (1972 RU2)
Classification: Main-belt Asteroid          SPK-ID: 2003231
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1267458098138723 3.4514e-08  
a 2.446068720098254 8.9267e-09 au
q 2.136039759309019 8.6487e-08 au
i 6.373884958977744 4.5708e-06 deg
node 324.3208587996596 2.7983e-05 deg
peri 54.82118914351897 3.3289e-05 deg
M 38.70300041751963 1.6886e-05 deg
tp 2458450.274540279517
(2018-Nov-27.77454028)
6.544e-05 TDB
period 1397.3378010996
3.83
7.6492e-06
2.094e-08
d
yr
n .2576327640436744 1.4103e-09 deg/d
Q 2.756097680887489 1.0058e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2209  
   data-arc span      25666 days (70.27 yr)  
   first obs. used      1949-08-21  
   last obs. used      2019-11-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44623  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-03 20:46:24  

Additional Information
 Earth MOID = 1.14394 au 
 Jupiter MOID = 2.73706 au 
 T_jup = 3.479 
[ 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
absolute magnitude H 13.4   n/a MPO452208  
diameter diameter 13.424 km 0.193 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.052   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

3231 Mila (1972 RU2)          Discovered 1972-Sep-04 by Zhuravleva, L. at Nauchnyj
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1972 RU2 = 1949 QJ1 = 1949 QN1 = 1955 EL = 1972 QJ 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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