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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05704566991157938 7.5888e-08  
a 3.11757150763237 4.2598e-08 au
q 2.939727552482229 2.5932e-07 au
i 4.191135568985788 9.5648e-06 deg
node 15.32880259028564 8.1957e-05 deg
peri 295.2339617198004 0.00011439 deg
M 276.3673582786304 8.0492e-05 deg
tp 2459467.585490642648
(2021-Sep-10.08549064)		 0.00044988 TDB
period 2010.587889732864
5.50		 4.1209e-05
1.128e-07		 d
yr
n .1790521080119662 3.6698e-09 deg/d
Q 3.295415462782511 4.5028e-08 au
   Orbit Determination Parameters
   # obs. used (total)      196  
   data-arc span      7116 days (19.48 yr)  
   first obs. used      2000-11-02  
   last obs. used      2020-04-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .61342  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-21 13:41:01  

Additional Information
 Earth MOID = 1.92873 au 
 Jupiter MOID = 1.87813 au 
 T_jup = 3.210 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457624.5 (2016-Aug-24.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05592276810050488 7.5938e-08  
q 2.945484141852009 2.5944e-07 au
tp 2457456.760951163943
(2016-Mar-09.26095116)		 0.00045896 TDB
node 15.35145940501394 8.1934e-05 deg
peri 295.3818881581983 0.00011544 deg
i 4.190964343182928 9.5636e-06 deg
   Orbit Determination Parameters
   # obs. used (total)      196  
   data-arc span      7116 days (19.48 yr)  
   first obs. used      2000-11-02  
   last obs. used      2020-04-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .61342  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-21 13:41:01  

Additional Information
 Jupiter MOID = 1.87813 au 
 T_jup = 3.210 
Orbit Covariance (6×6)
  e q tp node peri i
e 5.76658869267002E-15 -1.952282995037059E-14 9.429397766140174E-12 8.066782246583108E-15 1.838505849931721E-12 3.312293364706095E-15
q -1.952282995037059E-14 6.730833303294539E-14 -3.023946362134267E-11 -3.531215048279565E-14 -5.896823672618252E-12 -7.946375684022597E-15
tp 9.429397766140174E-12 -3.023946362134267E-11 2.106444568907221E-7 -5.649937259619409E-11 3.73337963429671E-8 1.124498911546462E-11
node 8.066782246583108E-15 -3.531215048279565E-14 -5.649937259619409E-11 6.713240889662655E-9 -6.705136589131614E-9 -6.530471601435072E-11
peri 1.838505849931721E-12 -5.896823672618252E-12 3.73337963429671E-8 -6.705136589131614E-9 1.33262882828733E-8 6.747782345837923E-11
i 3.312293364706095E-15 -7.946375684022597E-15 1.124498911546462E-11 -6.530471601435072E-11 6.747782345837923E-11 9.146168712275828E-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 15.8   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

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