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148780 Altjira (2001 UQ18)
Classification: TransNeptunian Object          SPK-ID: 2148780
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

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Orbit Diagram
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Note: This Java-based orbit viewer will eventually be retired.

Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances. For accurate long-term ephemerides, please instead use our Horizons system.

Note: If the applet is not working, here are some notes that might help.
Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).

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
29.784 TDB
period 106847.9399800918
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.arcLast Updated: 2008-08-25
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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