+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   15789 (1993 SC) Classification: TransNeptunian Object          SPK-ID: 2015789 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 10 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .188503700224049 1.2717e-05   a 39.53250775835227 0.0015211 au q 32.08048376676695 0.00074774 au i 5.149032850277698 3.3727e-05 deg node 354.534784782594 0.00032495 deg peri 316.8610761982749 0.0074706 deg M 71.57342069198511 0.008641 deg tp 2440950.415173949797 (1970-Dec-29.91517395) 1.1379 TDB period 90788.31882777026 248.56 5.24 0.01435 d yr n .003965267830137235 2.2886e-07 deg/d Q 46.9845317499376 0.0018078 au   Orbit Determination Parameters    # obs. used (total)      146      data-arc span      9614 days (26.32 yr)      first obs. used      1993-09-23      last obs. used      2020-01-19      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      2      norm. resid. RMS      .68838      source      ORB      producer      Otto Matic      solution date      2020-Nov-13 02:31:22   Additional Information  Earth MOID = 31.0683 au   Jupiter MOID = 27.0033 au   T_jup = 5.524  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 7.0   n/a MPO229164   diameter diameter 328 km 60 Earth, Moon, and Planets, v. 89, Issue 1, p. 117-134 (2002)   geometric albedo albedo 0.022   0.010 Earth, Moon, and Planets, v. 89, Issue 1, p. 117-134 (2002)   15789 (1993 SC)          Discovered 1993-Sep-17 by Williams, I. P., Fitzsimmons, A., O'Ceallaigh, D. at La Palma Reference: 20000726/Numbers.arc Last Updated: 2004-04-19 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2021-Jan-21 18:47 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin