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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.


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1269600215678771 3.3499e-08  
a 2.445651188199045 8.2759e-09 au
q 2.13515126059779 8.3287e-08 au
i 6.374942129248327 4.5366e-06 deg
node 324.3167637422135 2.5615e-05 deg
peri 54.74422202746728 3.0893e-05 deg
M 141.8293431327996 1.6692e-05 deg
tp 2458450.131218870991
(2018-Nov-27.63121887)
6.4128e-05 TDB
period 1396.980038333286
3.82
7.0909e-06
1.941e-08
d
yr
n .2576987430897796 1.3081e-09 deg/d
Q 2.7561511158003 9.3267e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2582  
   data-arc span      25863 days (70.81 yr)  
   first obs. used      1949-08-21  
   last obs. used      2020-06-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43041  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:02:04  

Additional Information
 Earth MOID = 1.14382 au 
 Jupiter MOID = 2.74025 au 
 T_jup = 3.479 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456995.5 (2014-Dec-04.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .126196528204057 3.3742e-08  
q 2.137281720300043 8.3912e-08 au
tp 2457049.657504629842
(2015-Jan-27.15750463)
6.343e-05 TDB
node 324.4208091538465 2.556e-05 deg
peri 53.9689336455632 3.0917e-05 deg
i 6.382472684206438 4.5402e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2582  
   data-arc span      25863 days (70.81 yr)  
   first obs. used      1949-08-21  
   last obs. used      2020-06-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43041  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:02:04  

Additional Information
 Jupiter MOID = 2.74025 au 
 T_jup = 3.479 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.138504708947466E-15 -2.821077704739696E-15 -1.069351096034732E-12 4.305465988188203E-15 -3.079692101886251E-13 -9.267510611907758E-17
q -2.821077704739696E-15 7.041181073739903E-15 2.672089017761145E-12 -1.109406350711829E-14 7.680868263383972E-13 5.324772608308571E-16
tp -1.069351096034732E-12 2.672089017761145E-12 4.023315588653011E-9 -1.343340722804379E-11 1.108137484979458E-9 -3.783408605289844E-13
node 4.305465988188203E-15 -1.109406350711829E-14 -1.343340722804379E-11 6.533243654829943E-10 -6.524598994915744E-10 4.194120902181532E-12
peri -3.079692101886251E-13 7.680868263383972E-13 1.108137484979458E-9 -6.524598994915744E-10 9.55889220618676E-10 -4.271951709771977E-12
i -9.267510611907758E-17 5.324772608308571E-16 -3.783408605289844E-13 4.194120902181532E-12 -4.271951709771977E-12 2.061354210455047E-11

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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