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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1269600207240841 3.3535e-08  
a 2.445651188852368 8.332e-09 au
q 2.135151263231791 8.3416e-08 au
i 6.37494244547586 4.552e-06 deg
node 324.3167608109791 2.5876e-05 deg
peri 54.7442234983011 3.1185e-05 deg
M 141.8293441121633 1.6744e-05 deg
tp 2458450.131214850035
(2018-Nov-27.63121485)
6.4355e-05 TDB
period 1396.980038893063
3.82
7.139e-06
1.955e-08
d
yr
n .2576987429865185 1.3169e-09 deg/d
Q 2.756151114472946 9.3899e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2519  
   data-arc span      25818 days (70.69 yr)  
   first obs. used      1949-08-21  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42743  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:51:18  

Additional Information
 Earth MOID = 1.14382 au 
 Jupiter MOID = 2.74025 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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