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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 ]

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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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1271463936517955 1.7491e-08  
a 2.445233850820443 7.9873e-09 au
q 2.134331185053331 4.2805e-08 au
i 6.375119833928595 2.9648e-07 deg
node 324.3180875477585 2.3314e-06 deg
peri 54.71749349724541 1.0039e-05 deg
M 193.4033212558864 8.694e-06 deg
tp 2459846.812959502871
(2022-Sep-24.31295950)
3.5154e-05 TDB
period 1396.622472758958
3.82
6.8431e-06
1.874e-08
d
yr
n .2577647195443146 1.263e-09 deg/d
Q 2.756136516587555 9.0029e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2630  
   data-arc span      26146 days (71.58 yr)  
   first obs. used      1949-08-21  
   last obs. used      2021-03-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43205  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 20:49:53  

Additional Information
 Earth MOID = 1.14158 au 
 Jupiter MOID = 2.74134 au 
 T_jup = 3.479 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457029.5 (2015-Jan-07.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .126175515543734 1.774e-08  
q 2.137281100227483 4.3494e-08 au
tp 2457049.663014387769
(2015-Jan-27.16301439)
3.1188e-05 TDB
node 324.4208746311762 2.3275e-06 deg
peri 53.9705975186759 1.01e-05 deg
i 6.382473716238652 2.9675e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      2630  
   data-arc span      26146 days (71.58 yr)  
   first obs. used      1949-08-21  
   last obs. used      2021-03-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43205  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 20:49:53  

Additional Information
 Jupiter MOID = 2.74134 au 
 T_jup = 3.479 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.146934662622537E-16 -7.616174150525152E-16 -4.6836186940178E-13 4.190364878937487E-15 -1.484031740494846E-13 1.38687629858653E-16
q -7.616174150525152E-16 1.891763429462134E-15 1.171411375656636E-12 -1.004842129681006E-14 3.708360201299228E-13 -3.048269910613305E-16
tp -4.6836186940178E-13 1.171411375656636E-12 9.726674007285469E-10 -1.309467788486619E-11 3.059136800714877E-10 -4.78058476253809E-13
node 4.190364878937487E-15 -1.004842129681006E-14 -1.309467788486619E-11 5.417054105923168E-12 -9.324021105893429E-12 2.420647954632866E-14
peri -1.484031740494846E-13 3.708360201299228E-13 3.059136800714877E-10 -9.324021105893429E-12 1.020055652215964E-10 -1.907323481788765E-13
i 1.38687629858653E-16 -3.048269910613305E-16 -4.78058476253809E-13 2.420647954632866E-14 -1.907323481788765E-13 8.805854624830841E-14

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.47   n/a E2021B10  
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

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