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12926 Brianmason (1999 SO9)
Classification: Main-belt Asteroid          SPK-ID: 2012926
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2213138513848253 4.7287e-08  
a 2.6879414378205 1.2154e-08 au
q 2.09306276591958 1.3012e-07 au
i 8.784728433741066 4.5087e-06 deg
node 44.89585358353795 2.4717e-05 deg
peri 309.0120111784244 2.5646e-05 deg
M 225.6586483147751 7.8188e-06 deg
tp 2459601.169172292611
(2022-Jan-21.66917229)
3.5948e-05 TDB
period 1609.637682759168
4.41
1.0918e-05
2.989e-08
d
yr
n .2236528156963276 1.517e-09 deg/d
Q 3.282820109721419 1.4844e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2056  
   data-arc span      24985 days (68.41 yr)  
   first obs. used      1951-12-01  
   last obs. used      2020-04-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46488  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 03:48:22  

Additional Information
 Earth MOID = 1.10204 au 
 Jupiter MOID = 2.20375 au 
 T_jup = 3.321 
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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.5   n/a MPO384870  
diameter diameter 10.197 km 0.285 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.081   0.023 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

12926 Brianmason           Discovered 1999 Sept. 27 by J. L. Schiff and C. J. Schiff at Takapuna.
Renowned New Zealand-born meteoriticist Brian Mason (b. 1917) worked at the American Museum of Natural History and the Smithsonian Institution. His research included the classification of Antarctic meteorites. The minerals brianite and stenhuggarite (Swedish for stone mason) are named for him.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20001013/MPCPages.arcLast Updated: 2013-03-29

Alternate Designations
 1999 SO9 = 1982 VR = 1989 GM8 = 1998 HM40 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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