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249488 (2009 UN129)
Classification: Main-belt Asteroid          SPK-ID: 2249488
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1364095702488024 1.0923e-07  
a 2.674271946524645 3.2733e-08 au
q 2.309475659570789 3.0502e-07 au
i 10.36653367231979 8.1325e-06 deg
node 255.6800332051067 4.3144e-05 deg
peri 264.3377048845538 5.4261e-05 deg
M 52.32594200518704 3.2057e-05 deg
tp 2458768.321856391051
(2019-Oct-11.82185639)
0.00014039 TDB
period 1597.374619475287
4.37
2.9328e-05
8.03e-08
d
yr
n .2253698009288857 4.1378e-09 deg/d
Q 3.0390682334785 3.7198e-08 au
  Orbit Determination Parameters
   # obs. used (total)      255  
   data-arc span      8074 days (22.11 yr)  
   first obs. used      1996-12-31  
   last obs. used      2019-02-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60408  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-25 10:24:03  

Additional Information
 Earth MOID = 1.34615 au 
 Jupiter MOID = 2.09141 au 
 T_jup = 3.343 
[ 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 16.1   n/a MPO326121  
diameter diameter 4.167 km 0.323 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.044   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

249488 (2009 UN129)          Discovered 2009-Oct-26 by Mt. Lemmon Survey at Mount Lemmon
Reference: 20100824/Numbers.arcLast Updated: 2010-08-27

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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