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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05727162375190791 7.2632e-08  
a 3.1183333867873 4.2075e-08 au
q 2.939741370326205 2.5157e-07 au
i 4.190787418260571 8.9199e-06 deg
node 15.32319544468009 7.2327e-05 deg
peri 295.0781853474185 0.00010701 deg
M 312.3495579780051 7.8816e-05 deg
tp 2459466.723676459871
(2021-Sep-09.22367646)		 0.00044037 TDB
period 2011.324962763503
5.51		 4.0707e-05
1.114e-07		 d
yr
n .1789864923196549 3.6225e-09 deg/d
Q 3.296925403248395 4.4484e-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 = 1.92674 au 
 Jupiter MOID = 1.87571 au 
 T_jup = 3.210 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457913.5 (2017-Jun-09.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05607466329550023 7.2704e-08  
q 2.945055414755684 2.5181e-07 au
tp 2457456.430654541996
(2016-Mar-08.93065454)		 0.00045038 TDB
node 15.35120582071101 7.2304e-05 deg
peri 295.3052067667132 0.00010811 deg
i 4.190723639230914 8.9199e-06 deg
   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
 Jupiter MOID = 1.87571 au 
 T_jup = 3.210 
Orbit Covariance (6×6)
  e q tp node peri i
e 5.285940868774675E-15 -1.815206135858305E-14 7.58605669615124E-12 5.481087015798437E-15 1.540889464100677E-12 3.067269263082144E-15
q -1.815206135858305E-14 6.341018113290131E-14 -2.492626461700917E-11 -2.508095546964105E-14 -5.042071485870138E-12 -7.525015897834354E-15
tp 7.58605669615124E-12 -2.492626461700917E-11 2.028456796107986E-7 -1.962080359853006E-10 3.619336033414871E-8 2.223877952643752E-11
node 5.481087015798437E-15 -2.508095546964105E-14 -1.962080359853006E-10 5.227899142465872E-9 -5.247960603941244E-9 6.655371489097715E-11
peri 1.540889464100677E-12 -5.042071485870138E-12 3.619336033414871E-8 -5.247960603941244E-9 1.168688133834292E-8 -6.210779662048145E-11
i 3.067269263082144E-15 -7.525015897834354E-15 2.223877952643752E-11 6.655371489097715E-11 -6.210779662048145E-11 7.956414029211366E-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 15.96   n/a E2021B55  
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

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