Astrometry

An assessment of AllWISE astrometry and its use as an infrared celestial reference frame through comparison with Gaia DR3.

A simulation-based assessment of the CSST sky survey’s potential to extend the Gaia celestial reference frame.

We discovered a new term of secular aberration drift due to the changing line of sight, affecting stellar proper motions measured by Gaia.

Jun Yao demonstrates how trigonometric parallax can be used to measure celestial distances on CCTV News.

A workshop on progress in CSST astrometry science projects and requirements for future simulated data.

We determined that current planetary ephemeris reference frames are aligned within 0.4 mas and non-rotating to better than 5 μas/yr.

Using pulsar positions measured independently by timing, VLBI, and Gaia, this paper assesses the orientation consistency between …

VLBI source position time series indicate that the ICRF3 axes are stable at the 10–20 microarcsecond level and confirm the robustness of the commonly used four-step solution.

We estimated the effect of Galactic aberration on Earth orientation parameters based on geodetic/astrometric very long baseline …

Source position time series constrain the global spin and yearly orientation stability of the ICRF3 axes.