+ 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 11 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1887628098314557 1.2938e-05   a 39.60185824599835 0.0015271 au q 32.1265002089367 0.00074239 au i 5.146947236238087 3.369e-05 deg node 354.5066578790104 0.00032494 deg peri 317.3904935904653 0.0074358 deg M 71.85035616953671 0.008651 deg tp 2441032.873252466190 (1971-Mar-22.37325247) 1.1371 TDB period 91027.32370149562 249.22 5.2653 0.01442 d yr n .003954856469037165 2.2876e-07 deg/d Q 47.07721628306 0.0018154 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.      DE441      SB-pert. ephem.      SB441-N16      condition code      2      norm. resid. RMS      .68838      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 01:09:00   Additional Information  Earth MOID = 31.1123 au   Jupiter MOID = 27.0512 au   T_jup = 5.528  [ 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-May-10 22:34 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin