+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   148780 Altjira (2001 UQ18) Classification: TransNeptunian Object          SPK-ID: 2148780 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 14 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .06530422538348254 5.5519e-05   a 44.18912764650737 0.0084965 au q 41.30339089518037 0.0097996 au i 5.194359100076298 0.00015346 deg node 1.654910351425189 0.0025529 deg peri 300.6357604027723 0.13039 deg M 127.7061329072407 0.1391 deg tp 2421335.444981593602 (1917-Apr-16.94498159) 30.678 TDB period 107293.0445445305 293.75 30.945 0.08472 d yr n .003355296715907684 9.6771e-07 deg/d Q 47.07486439783436 0.0090513 au   Orbit Determination Parameters    # obs. used (total)      81      data-arc span      6580 days (18.02 yr)      first obs. used      2001-10-20      last obs. used      2019-10-26      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      4      norm. resid. RMS      .37465      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 19:11:23   Additional Information  Earth MOID = 40.2907 au   Jupiter MOID = 36.1912 au   T_jup = 5.910  [ 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 5.8   n/a MPO502893   148780 Altjira           Discovered 2001 Oct. 20 by the Deep Ecliptic Survey at Kitt Peak. According to the mythology of the Arrernte in central Australia, Altjira was the central god of the Dreamtime who created the earth and then retired to the sky. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20080819/MPCPages.arc Last Updated: 2008-08-25 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2021-Jul-25 13:29 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin