+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   173236 (1999 BA27) Classification: Main-belt Asteroid          SPK-ID: 2173236 [ 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 16 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1118773610007855 3.7592e-08   a 2.646774326247824 1.5436e-08 au q 2.350660199462585 9.9368e-08 au i 3.606499380914795 4.3739e-06 deg node 116.0492889104063 6.7665e-05 deg peri 273.5947777998006 7.1264e-05 deg M 64.38232957291675 2.007e-05 deg tp 2458719.220563735039 (2019-Aug-23.72056373) 8.8134e-05 TDB period 1572.801073324048 4.31 1.3758e-05 3.767e-08 d yr n .2288909933404072 2.0023e-09 deg/d Q 2.942888453033062 1.7162e-08 au   Orbit Determination Parameters    # obs. used (total)      374      data-arc span      9595 days (26.27 yr)      first obs. used      1993-10-21      last obs. used      2020-01-28      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .48361      source      ORB      producer      Otto Matic      solution date      2020-Feb-24 17:01:01   Additional Information  Earth MOID = 1.35913 au   Jupiter MOID = 2.47919 au   T_jup = 3.381  [ 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 16.1   n/a MPO502964   173236 (1999 BA27)          Discovered 1999-Jan-16 by Spacewatch at Kitt Peak Reference: 20080122/Numbers.arc Last Updated: 2008-01-28 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Jul-07 12:40 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin