+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   5251 Bradwood (1985 KA) Classification: Main-belt Asteroid          SPK-ID: 2005251 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 30 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2942169312852441 3.8984e-08   a 2.360623824501753 7.9426e-09 au q 1.666088326938011 9.1436e-08 au i 22.18907068465613 4.4556e-06 deg node 250.0125864834583 1.1479e-05 deg peri 80.28079165595437 1.3035e-05 deg M 175.2267319031196 6.7449e-06 deg tp 2458355.683018708678 (2018-Aug-25.18301871) 2.4128e-05 TDB period 1324.764268235168 3.63 6.686e-06 1.831e-08 d yr n .2717464598283489 1.3715e-09 deg/d Q 3.055159322065495 1.0279e-08 au   Orbit Determination Parameters    # obs. used (total)      1343      data-arc span      14246 days (39.00 yr)      first obs. used      1981-04-25      last obs. used      2020-04-26      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .45858      source      ORB      producer      Otto Matic      solution date      2020-May-20 02:18:51   Additional Information  Earth MOID = .801752 au   Jupiter MOID = 2.60399 au   T_jup = 3.396  [ 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 13.8   n/a MPO452240   rotation period rot_per 4.296 h n/a LCDB (Rev. 2019-August); 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 ] 2020-Oct-30 23:43 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin