+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   58728 (1998 DR23) Classification: Main-belt Asteroid          SPK-ID: 2058728 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 15 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .04438623995674654 3.4427e-08   a 2.977300172187293 1.9754e-08 au q 2.845149012321325 9.8406e-08 au i 1.438649509731108 4.0755e-06 deg node 226.1234424023285 0.00014459 deg peri 289.5784377977363 0.00015178 deg M 133.808173750956 4.7124e-05 deg tp 2458303.050923932675 (2018-Jul-03.55092393) 0.00024411 TDB period 1876.429969454263 5.14 1.8675e-05 5.113e-08 d yr n .1918536827168144 1.9094e-09 deg/d Q 3.109451332053261 2.063e-08 au   Orbit Determination Parameters    # obs. used (total)      665      data-arc span      10047 days (27.51 yr)      first obs. used      1993-04-18      last obs. used      2020-10-20      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .597      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 22:49:52   Additional Information  Earth MOID = 1.8548 au   Jupiter MOID = 1.87029 au   T_jup = 3.259  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 15.4   n/a MPO436192   rotation period rot_per 10.21 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so. Published Reference List: [Chang, C.-H.; Lin, H.-W.; Ip, W.-H.; Chen, W.-P.; et al. (2019) Ap. J. Supp. Ser. 241, A6.] 58728 (1998 DR23)          Discovered 1998-Feb-19 by Farra d'Isonzo at Farra d'Isonzo Reference: 20030614/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1998 DR23 = 1995 SR36  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-20 20:18 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin