+ 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 9 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1884559657103525 7.1853e-05   a 39.52897543440545 0.0054731 au q 32.07950419537377 0.0018765 au i 5.148884257396923 0.0002376 deg node 354.5343859872752 0.00055331 deg peri 316.8491401442126 0.021276 deg M 71.59111140023649 0.028266 deg tp 2440948.373529383964 (1970-Dec-27.87352938) 3.4155 TDB period 90776.1508700409 248.53 18.853 0.05162 d yr n .003965799348723121 8.2364e-07 deg/d Q 46.97844667343713 0.0065045 au   Orbit Determination Parameters    # obs. used (total)      86      data-arc span      5839 days (15.99 yr)      first obs. used      1993-09-23      last obs. used      2009-09-18      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      3      norm. resid. RMS      .56876      source      ORB      producer      Otto Matic      solution date      2017-Apr-06 05:12:01   Additional Information  Earth MOID = 31.0673 au   Jupiter MOID = 27.0022 au   T_jup = 5.523  [ 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 ] 2020-Oct-24 04:25 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin