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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 ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .01429322683577872 3.7728e-08  
a 3.143348880032147 2.8817e-08 au
q 3.098420281465857 1.3047e-07 au
i 3.180759476742254 5.3568e-06 deg
node 314.0290389637156 8.9175e-05 deg
peri 311.5860976676406 0.00023316 deg
M 290.3389512539156 0.00021532 deg
tp 2459594.389871578307
(2022-Jan-14.88987158)
0.0012173 TDB
period 2035.57592543654
5.57
2.7992e-05
7.664e-08
d
yr
n .1768541254106236 2.432e-09 deg/d
Q 3.188277478598438 2.9229e-08 au
  Orbit Determination Parameters
   # obs. used (total)      348  
   data-arc span      9373 days (25.66 yr)  
   first obs. used      1995-08-22  
   last obs. used      2021-04-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53898  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 10:39:09  

Additional Information
 Earth MOID = 2.08168 au 
 Jupiter MOID = 1.81719 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 15.72   n/a E2021B55  
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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