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249489 (2009 UN131)
Classification: Main-belt Asteroid          SPK-ID: 2249489
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1419827659263178 5.0783e-08  
a 3.065015328023215 3.1284e-08 au
q 2.629835974143918 1.6767e-07 au
i 15.38881217551816 5.9325e-06 deg
node 142.5894817894487 1.6851e-05 deg
peri 246.6816318658091 2.566e-05 deg
M 2.65085747910085 2.0601e-05 deg
tp 2458986.067841788465
(2020-May-16.56784179)
0.0001121 TDB
period 1959.96087949429
5.37
3.0007e-05
8.215e-08
d
yr
n .1836771354808303 2.8121e-09 deg/d
Q 3.500194681902511 3.5725e-08 au
  Orbit Determination Parameters
   # obs. used (total)      362  
   data-arc span      9043 days (24.76 yr)  
   first obs. used      1995-01-29  
   last obs. used      2019-11-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59041  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-04 18:48:07  

Additional Information
 Earth MOID = 1.67647 au 
 Jupiter MOID = 2.10969 au 
 T_jup = 3.163 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.2   n/a MPO454850  
diameter diameter 3.108 km 0.934 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.152   0.061 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

249489 (2009 UN131)          Discovered 2009-Oct-19 by La Sagra at La Sagra
Reference: 20100824/Numbers.arcLast Updated: 2010-08-27

Alternate Designations
 2009 UN131 = 2003 SN187 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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