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5251 Bradwood (1985 KA)
Classification: Mars-crossing Asteroid          SPK-ID: 2005251
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2950887087362897 5.2658e-08  
a 2.359812900891565 1.2962e-08 au
q 1.663458759108235 1.2387e-07 au
i 22.18035779600165 9.9122e-06 deg
node 250.0954627404128 1.6414e-05 deg
peri 80.16368986147886 2.557e-05 deg
M 100.5357477317146 2.1939e-05 deg
tp 2457030.729044936750
(2015-Jan-08.22904494)
7.8836e-05 JED
period 1324.081700550951
3.63
1.0909e-05
2.987e-08
d
yr
n .2718865458605793 2.2401e-09 deg/d
Q 3.056167042674895 1.6787e-08 au
  Orbit Determination Parameters
   # obs. used (total)      612  
   data-arc span      12644 days (34.62 yr)  
   first obs. used      1981-04-25  
   last obs. used      2015-12-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52501  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 12:55:33  

Additional Information
 Earth MOID = .79755 au 
 Jupiter MOID = 2.59299 au 
 T_jup = 3.397 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.8 mag n/a MPO358681  
rotation period rot_per 4.3013 h n/a LCDB (Rev. 2015-December); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]

5251 Bradwood           Discovered 1985 May 18 by A. C. Gilmore and P. M. Kilmartin at Lake Tekapo.
Frank Bradshaw Wood (1915-1997) was a pioneer of photoelectric photometry and an expert on close binary stars. As a professor at the University of Pennsylvania, he supported the founding of Mt. John Observatory and promoted astronomical research there.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20051215/MPCPages.arcLast Updated: 2006-03-22
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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