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Secular aberration drift and IAU definition of International Celestial Reference System

Created 17/10/2025

Updated 17/10/2025

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The gravitational attraction of the Galactic Centre leads to the centrifugal acceleration of the Solar system barycentre. It results in secular aberration drift which displaces the position of the distant radio sources. The effect should be accounted for in high-precision astrometric reductions as well as by the corresponding update of the International Celestial Reference System definition. Citation: Titov, O. (2010). Secular aberration drift and IAU definition of International Celestial Reference System. Monthly Notices of the Royal Astronomical Society: Letters, 407(1), L46–L48. https://doi.org/10.1111/j.1745-3933.2010.00901.x

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Additional Info

Field Value
Title Secular aberration drift and IAU definition of International Celestial Reference System
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/0d5f312a-2960-42fb-a09d-337df8481e4b
Contact Point
Geoscience Australia Data
clientservices@ga.gov.au
Reference Period
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    [
      [
        112.0,
        -44.0
      ],
      [
        154.0,
        -44.0
      ],
      [
        154.0,
        -9.0
      ],
      [
        112.0,
        -9.0
      ],
      [
        112.0,
        -44.0
      ]
    ]
  ],
  "type": "Polygon"
}
Data Portal Geoscience Australia

Data Source

This dataset was originally found on Geoscience Australia "Secular aberration drift and IAU definition of International Celestial Reference System". Please visit the source to access the original metadata of the dataset:
https://ecat.ga.gov.au/geonetwork/srv/eng/csw/dataset/secular-aberration-drift-and-iau-definition-of-international-celestial-reference-system