+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   173571 (2001 BU29) Classification: Main-belt Asteroid          SPK-ID: 2173571 [ 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 14 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .09972971142538224 3.4514e-08   a 2.306714075575158 1.1126e-08 au q 2.07666614647718 7.9028e-08 au i 5.470520404587765 3.9455e-06 deg node 126.84390916512 4.6359e-05 deg peri 344.7226524792739 5.3535e-05 deg M 197.4196011280123 2.6e-05 deg tp 2459578.402747683564 (2021-Dec-29.90274768) 9.3785e-05 TDB period 1279.643736942073 3.50 9.2579e-06 2.535e-08 d yr n .2813283022509698 2.0353e-09 deg/d Q 2.536762004673136 1.2235e-08 au   Orbit Determination Parameters    # obs. used (total)      474      data-arc span      6713 days (18.38 yr)      first obs. used      2001-01-03      last obs. used      2019-05-22      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .5306      source      ORB      producer      Otto Matic      solution date      2020-Feb-24 17:06:16   Additional Information  Earth MOID = 1.09375 au   Jupiter MOID = 2.53776 au   T_jup = 3.575  [ 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 16.7   n/a MPO436861   rotation period rot_per 2.39 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on fragmentary lightcurve(s), may be completely wrong. Published Reference List: [Chang, C.-K.; Lin, H.-W.; Ip, W.-H.; Prince, T.A.; et al. (2016) Astrophys. J. Sup. Ser. 227, A20.] 173571 (2001 BU29)          Discovered 2001-Jan-20 by LINEAR at Socorro Reference: 20080122/Numbers.arc Last Updated: 2008-01-28 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Aug-06 23:27 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin