+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   53311 Deucalion (1999 HU11) Classification: TransNeptunian Object          SPK-ID: 2053311 [ 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 6 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .06693278949220625 1.2786e-05   a 44.2932519780779 0.0014267 au q 41.32858106750397 0.0010016 au i .3726809313065662 9.5041e-05 deg node 51.36508720852748 0.0017847 deg peri 239.6133542647877 0.019502 deg M 306.6461047860928 0.018764 deg tp 2474958.130625960632 (2064-Feb-07.63062596) 4.8518 TDB period 107672.4951817277 294.79 5.2022 0.01424 d yr n .003343472252522787 1.6154e-07 deg/d Q 47.25792288865184 0.0015222 au   Orbit Determination Parameters    # obs. used (total)      128      data-arc span      7744 days (21.20 yr)      first obs. used      1999-04-12      last obs. used      2020-06-24      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      2      norm. resid. RMS      .7824      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 23:13:36   Additional Information  Earth MOID = 40.3124 au   Jupiter MOID = 36.1505 au   T_jup = 5.939  [ 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 6.6   n/a MPO341046   53311 Deucalion           Discovered 1999 Apr. 18 by the Deep Ecliptic Survey at Kitt Peak. After a flood in which all humans were drowned except for Deucalion and Pyrrha, an oracle tells them to "throw the bones of their mother" behind them. Puzzled, they decided that their mother is Earth and her bones are stones. The stones they then threw over their shoulders sprang up into people to repopulate the world. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20030614/MPCPages.arc Last Updated: 2005-04-26 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jan-21 09:52 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin