SiO maser astrometry of the red transient V838 Monocerotis Gisela N. Ortiz-León, Karl M. Menten, Tomasz Kamiński, Andreas Brunthaler, Mark J. Reid and Romuald Tylenda A&A, 638 (2020) A17 Published online: 03 June 2020 DOI: 10.1051/0004-6361/202037712