+ 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 13 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .06595477351294197 5.7396e-05   a 44.12515756919139 0.0084665 au q 41.2148927954925 0.0098954 au i 5.195172136652193 0.00015365 deg node 1.685485731501927 0.0025542 deg peri 299.3798478032504 0.12832 deg M 128.325902451999 0.13687 deg tp 2421037.750460339135 (1916-Jun-23.25046034) 29.937 TDB period 107060.1458611749 293.11 30.813 0.08436 d yr n .003362595829701303 9.678e-07 deg/d Q 47.03542234289029 0.009025 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.      DE431      SB-pert. ephem.      SB431-N16      condition code      4      norm. resid. RMS      .37465      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 14:05:34   Additional Information  Earth MOID = 40.2007 au   Jupiter MOID = 36.0985 au   T_jup = 5.905  [ 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-Apr-11 19:19 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin