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212953 (2009 BU44)
Classification: Main-belt Asteroid          SPK-ID: 2212953
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .01422690725609345 4.7335e-08  
a 3.145128612694097 3.8271e-08 au
q 3.100383159612813 1.4622e-07 au
i 3.180035425179918 6.8043e-06 deg
node 314.031322959456 0.00010974 deg
peri 309.10778224511 0.00030457 deg
M 186.7803519925137 0.0002849 deg
tp 2459580.781241796683
(2022-Jan-01.28124180)
0.0016146 TDB
period 2037.304954179067
5.58
3.7186e-05
1.018e-07
d
yr
n .1767040320898165 3.2253e-09 deg/d
Q 3.189874065775382 3.8816e-08 au
  Orbit Determination Parameters
   # obs. used (total)      276  
   data-arc span      8571 days (23.47 yr)  
   first obs. used      1995-08-22  
   last obs. used      2019-02-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55625  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 11:45:21  

Additional Information
 Earth MOID = 2.08523 au 
 Jupiter MOID = 1.81594 au 
 T_jup = 3.207 
[ 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 15.6   n/a MPO418140  
diameter diameter 4.486 km 0.379 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.038   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

212953 (2009 BU44)          Discovered 2009-Jan-16 by Spacewatch at Kitt Peak
Reference: 20090409/Numbers.arcLast Updated: 2009-04-10

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