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249331 (2008 UB355)
Classification: Outer Main-belt Asteroid          SPK-ID: 2249331
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1318652764461517 5.4474e-08  
a 3.210640613222878 4.7049e-08 au
q 2.787268601191002 1.7965e-07 au
i 5.35482720651314 5.5777e-06 deg
node 60.27777067258789 5.9262e-05 deg
peri 152.9552777660348 6.3114e-05 deg
M 209.6471824221849 2.5198e-05 deg
tp 2459878.096817681760
(2022-Oct-25.59681768)		 0.00016013 TDB
period 2101.289882392271
5.75		 4.6188e-05
1.265e-07		 d
yr
n .1713233395433039 3.7659e-09 deg/d
Q 3.634012625254755 5.3253e-08 au
   Orbit Determination Parameters
   # obs. used (total)      251  
   data-arc span      5378 days (14.72 yr)  
   first obs. used      2005-03-08  
   last obs. used      2019-11-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .65175  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 00:18:41  

Additional Information
 Earth MOID = 1.78218 au 
 Jupiter MOID = 1.33622 au 
 T_jup = 3.171 
[ 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 15.5   n/a MPO454848  
diameter diameter 3.426 km 0.122 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.125   0.024 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

249331 (2008 UB355)          Discovered 2008-Oct-31 by Spacewatch at Kitt Peak
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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