+ 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 32 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2943743026959422 3.895e-08   a 2.360292284470033 7.9438e-09 au q 1.665482889070555 9.1344e-08 au i 22.18918371003667 4.4455e-06 deg node 250.0042083829145 1.1475e-05 deg peri 80.30657602483325 1.3022e-05 deg M 229.5567955180796 6.8193e-06 deg tp 2459680.416924038370 (2022-Apr-10.91692404) 2.595e-05 TDB period 1324.485191390399 3.63 6.6866e-06 1.831e-08 d yr n .2718037184108373 1.3722e-09 deg/d Q 3.055101679869512 1.0282e-08 au   Orbit Determination Parameters    # obs. used (total)      1355      data-arc span      14510 days (39.73 yr)      first obs. used      1981-04-25      last obs. used      2021-01-15      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .46287      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 19:07:09   Additional Information  Earth MOID = .799774 au   Jupiter MOID = 2.604 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 13.85   n/a E2021B10   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-Apr-10 12:47 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin