+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   486958 Arrokoth (2014 MU69) Classification: TransNeptunian Object          SPK-ID: 2486958 [ 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 2 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .05230624621128844 0.40369   a 44.6736039109785 2.5527 au q 42.33689538566528 15.617 au i 2.447940837406755 0.031201 deg node 159.1040966269518 1.1931 deg peri 181.48456177323 233 deg M 312.030160091762 183.01 deg tp 2473533.011628723159 (2060-Mar-14.51162872) 56686 TDB period 109062.3649432252 298.60 9347.9 25.59 d yr n .003300863686455048 0.00028292 deg/d Q 47.01031243629172 2.6862 au   Orbit Determination Parameters    # obs. used (total)      58      data-arc span      118 days      first obs. used      2014-06-26      last obs. used      2014-10-22      planetary ephem.      DE431      SB-pert. ephem.      SB431-BIG16      condition code      5      norm. resid. RMS      .014518      source      ORB      producer      Otto Matic      solution date      2015-Apr-07 15:31:42   Additional Information  Earth MOID = 41.3286 au   Jupiter MOID = 37.3418 au   T_jup = 5.963  [ 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 11.1   n/a MPO398908   rotation period rot_per 15.918 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so. Published Reference List: [Porter, S.; Beyer, R.; Keane, J.; Umurhan, O.; et al. (2019) EPSC-DPS Joint Meeting, 2019 September 15-20. Geneva, Switzerland, id. EPSC-DPS2019-311.] 486958 Arrokoth           Discovered 2014 by M. W. Buie and the New Horizons Search Team. Arrokoth is the word for "sky" from the Powhatan language of native people from the Chesapeake Bay region. Institutions in this region played a prominent role in facilitating the discovery and exploration of this ancient and distant object. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: MPC batch dated 2019-12-12 Last Updated: 2019-12-13 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jan-17 20:26 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin