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249157 (2008 BU9)
Classification: Main-belt Asteroid          SPK-ID: 2249157
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 .05704565397285125 7.2709e-08  
a 3.117571503379003 4.2226e-08 au
q 2.939727598161623 2.5169e-07 au
i 4.191133392658398 8.9207e-06 deg
node 15.32882849659044 7.2322e-05 deg
peri 295.2339265704945 0.00010713 deg
M 276.3673691839559 7.8996e-05 deg
tp 2459467.585428780890
(2021-Sep-10.08542878)
0.00044128 TDB
period 2010.587885618235
5.50
4.0848e-05
1.118e-07
d
yr
n .1790521083783929 3.6377e-09 deg/d
Q 3.295415408596384 4.4634e-08 au
  Orbit Determination Parameters
   # obs. used (total)      219  
   data-arc span      7173 days (19.64 yr)  
   first obs. used      2000-11-02  
   last obs. used      2020-06-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60111  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 00:19:58  

Additional Information
 Earth MOID = 1.92873 au 
 Jupiter MOID = 1.87813 au 
 T_jup = 3.210 
[ 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 15.8   n/a MPO433632  
diameter diameter 4.091 km 2.157 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.046   0.027 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

249157 (2008 BU9)          Discovered 2008-Jan-16 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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