This is a two day meeting, focusing on each of the key topics. Invited talks of 20 minutes and contributed talks of 12 minutes are foreseen, both including time for discussion. In addition a 30 minute review talk will be scheduled in which an overview of the field of modern astrometry and its science applications will be given.

Presentations and posters available online

PDF versions of the presentations and posters from this focus meeting can be found online at

E-poster and e-Talks

Please go to to see the e-talks and e-posters.

FM7-1 Astrometry science highlights

  • Modern astrometry review talk
  • Gaia DR2 and Gaia (E)DR3
  • VLBI
  • AO-assisted narrow field astrometry
  • Ground based surveys

Invited speakers Lennart Lindegren. Rachel Beaton, Sergey Koposov, Paolo Tanga

SpeakerTitleDuration (mins.)Time (UT+9hr)Type
Lennart Lindegren21st Century Astrometry and its Science Applications3010.30In room
Rachael BeatonThe 21st Century Challenge of Distances: More Robust, Faster, and Farther2011.00Remote
Alex GolovinThe Fifth Catalogue of Nearby Stars (CNS5): catalogue construction, completeness, and luminosity functions1211.20In room
Gordian EdenhoferThe Galactic 3D large-scale Distribution of Dust from Astrometric Data1211.32In room
Minia Manteiga (talk presented by Arturo Manchado)Galactic Planetary Nebulae central stars properties and binarity from Gaia EDR3 astrometry and photometry1211.44In room

FM7-2 Astrometry science highlights

SpeakerTitleDuration (mins.)Time (UT+9hr)Type
Sergei KoposovThe stellar streams revolution with Gaia2013.30Remote
Paolo TangaThe Gaia mission and the Solar System: new perspectives2013.50Remote
Daniel MikkolaThe velocity distribution of white dwarfs in Gaia EDR31214.10In room
Shuangjing XuThe Astrometric Animation of Water Masers towards the Mira Variable BX Cam1214.22In room
Tony SohnProper Motions in the Outer Halo and beyond the Milky Way1214.34In room

FM7-3 Astrometric techniques

  • Global astrometry, lessons learned from Gaia
  • Narrow-field high precision astrometry
  • Astrometry from ground based surveys
  • VLBI astrometry

Invited speakers Mark Reid, Sylvestre Lacour

SpeakerTitleDuration (mins.)Time (UT+9hr)Type
Mark ReidAdvances in VLBI Astrometry2015.15Remote
Sylvestre LacourAstrometry of exoplanets with optical interferometry2015.35Remote
Laurent LoinardVLBI astrometry in the epoch of Gaia1215.55In room
Megan JohnsonFive Years of USNO 50% VLBA Time1216.07In room
Lucas HuntComparing Images of ICRF Sources at S, X, K and Q-band1216.19Remote
Phil CiganThree years of ICRF3 source positions1216.31In room

FM7-4 Dense and accurate reference frames to optimize the science return from extremely large telescopes and large sky surveys

  • Astrometry with extremely large telescopes
  • Optical-radio synergies
  • Space-ground synergies

Invited speakers Davide Massari, Francois Mignard

SpeakerTitleDuration (mins.)Time (UT+9hr)Type
Francois MignardStatus of the Multi-Wavelength Reference Frames2010.30Remote
Davide MassariAstrometry with the ELT2010.50Remote
Christopher JacobsThe X/Ka 2022b VLBI Celestial Reference Frame1211.10In room
David GordonCurrent Celestial Reference Frame Status at X/S and K Bands1211.22In room
Aletha de WittImaging and Structure Analysis of ICRF sources at X and K-band1211.34In room
Oleg TitovNew explanation of the observed large positional offsets between radio and optical coordinates of the extragalactic objects1211.46In room

FM7-5 Future astrometric surveys

  • VLBI, SKA, …
  • Research and development needs for achieving sub-microarcsecond astrometry
  • Opportunities for coordination
  • Synergies with other space missions: Euclid, CSST, Roman, …

Invited speakers David Hobbs, Richard Dodson

SpeakerTitleDuration (mins.)Time (UT+9hr)Type
Richard DodsonUltra-precise Astrometry with the SKA2013.30Remote
David HobbsThe Hidden Regions – Future space astrometry in the Near InfraRed2013.50In room
Yoo Jung KimSpectroastrometry with Photonic Lanterns1214.10Remote

FM7-6 Synergy between astrometric, photometric, and spectroscopic surveys

  • Astrometry and photometry (LSST, SkyMapper, DES, …)
  • Astrometry and spectroscopy (WEAVE, 4MOST, SDSS-V, …)

Invited speakers Ana Queiroz, Chao Liu

Time (UT+9hr)Type
Anna QueirozStarHorse parameters for spectroscopic surveys with Gaia EDR3: ages for sub-giants and chemical substructures in the solar vicinity2015.15In room
Chao LiuWhen Gaia meets LAMOST2015.35Remote
Yuan-Sen TingPrecision Galactic Archaeology: Revealing the Milky Way’s Engines through the Statistical Alignment of Stars1215.55Remote
Areg MickaelianLuminosity function of white dwarfs and discovery of new white dwarfs by means of Gaia EDR3 data1216.07In room


Mashhoor AlwardatAstrometry From Hipparcos to Gaia: Parallax Discrepancy
Vincent RobertThe NAROO program
Naoteru GoudaOverview and progress of the JASMINE near-infrared space astrometry mission


Valeri MakarovAlignment and distortions of the Gaia celestial reference frame and the three components of ICRF3
Masato TsuboiALMA Astrometry of the Nuclear Star Cluster
Emil PuhaComparing the new MOG theory with dark matter approach in extragalactic context
Alisher S. HojaevGaia EDR3’s Reanalysis of Galactic Open Star Cluster NGC752
Rainer KoehlerGRAVITY Astrometry of the Young Triple Star TWA5
Sergei KalabanovGround based meteor radar of Kazan Federal University
Taihei YanoInvestigation of stars observed in the observation area of JASMINE
James (Gerbs) BauerNASA Planetary Data System’s Small Bodies Node Distribution of the Minor Planet Center Database and the SBN/MPC Annex
Zinovy MalkinOn the long-term ICRF stability
Antonia WilmotStandards of Fundamental Astronomy