+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   5251 Bradwood (1985 KA) Classification: Mars-crossing Asteroid          SPK-ID: 2005251 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 35 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2944892995967667 3.6907e-08   a 2.359965959171888 7.6819e-09 au q 1.664981236783147 8.6914e-08 au i 22.1906013964498 4.2213e-06 deg node 249.9990994819426 1.0947e-05 deg peri 80.33569367332112 1.2413e-05 deg M 282.8154797957172 6.8573e-06 deg tp 2459680.412649681508 (2022-Apr-10.91264968) 2.5776e-05 TDB period 1324.210523234833 3.63 6.4656e-06 1.77e-08 d yr n .2718600960220267 1.3274e-09 deg/d Q 3.054950681560629 9.9441e-09 au   Orbit Determination Parameters    # obs. used (total)      1548      data-arc span      14676 days (40.18 yr)      first obs. used      1981-04-25      last obs. used      2021-06-30      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .45402      source      ORB      producer      Otto Matic      solution date      2021-Jul-07 23:46:14   Additional Information  Earth MOID = .800506 au   Jupiter MOID = 2.60371 au   T_jup = 3.397  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 13.86   n/a MPCxxxxx   rotation period rot_per 4.296 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.] [Warner, B.D. (2018) Minor Planet Bull. 45, 380-386.] 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.arc Last Updated: 2006-03-22 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Aug-03 12:12 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin