+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   26375 (1999 DE9) Classification: TransNeptunian Object          SPK-ID: 2026375 [ 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 25 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .414839931511692 1.1203e-05   a 55.23343186838516 0.0013859 au q 32.32039877494856 0.00020962 au i 7.635427773959663 2.5354e-05 deg node 323.1200827653263 0.00016209 deg peri 159.4453804324144 0.001204 deg M 30.07377927848582 0.0015366 deg tp 2446475.233452117940 (1986-Feb-13.73345212) 0.17106 TDB period 149934.46335703 410.50 5.6433 0.01545 d yr n .002401049044626608 9.0371e-08 deg/d Q 78.14646496182176 0.0019609 au   Orbit Determination Parameters    # obs. used (total)      451      data-arc span      11066 days (30.30 yr)      first obs. used      1990-01-29      last obs. used      2020-05-17      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      2      norm. resid. RMS      .44733      source      ORB      producer      Otto Matic      solution date      2020-Nov-13 01:29:17   Additional Information  Earth MOID = 31.3373 au   Jupiter MOID = 27.0317 au   T_jup = 5.971  [ 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 4.8   n/a MPO468035   rotation period rot_per 24. h n/a LCDB (Rev. 2020-October); Warner et al., 2009 [lower-limit; Result based on fragmentary lightcurve(s), may be completely wrong.] 26375 (1999 DE9)          Discovered 1999-Feb-20 by Trujillo, C. A., Luu, J. at Kitt Peak Reference: 20010705/Numbers.arc Last Updated: 2004-04-19 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2021-Jan-28 12:24 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin