+ 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 2459000.5 (2020-May-31.0) TDB Reference: JPL 12 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .06638595593341712 6.0563e-05   a 44.06683076673487 0.0084801 au q 41.14141208132906 0.0099972 au i 5.196368364390408 0.00019924 deg node 1.728115882959417 0.0032028 deg peri 298.1200235254024 0.12802 deg M 128.9441294698013 0.1367 deg tp 2420729.903871181908 (1915-Aug-20.40387118) 29.784 TDB period 106847.9399800918 292.53 30.842 0.08444 d yr n .003369274129824836 9.7256e-07 deg/d Q 46.99224945214068 0.0090431 au   Orbit Determination Parameters    # obs. used (total)      76      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      .38158      source      ORB      producer      Otto Matic      solution date      2019-Dec-04 13:07:30   Additional Information  Earth MOID = 40.1291 au   Jupiter MOID = 36.0206 au   T_jup = 5.902  [ 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 ] 2020-Oct-19 22:25 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin