S2\S0–2 star - nearest approach to Sagittarius A*

[PaulM]

Amazing physics at work recently when the star S2 did it nearest approach to the black hole at the center of our galaxy in May

S2 was travelling at 2.5% the speed of light at nearest approach - lots of animations and info on this on the web including animations of all the stars and paths that orbit Sagittarius A* - fascinating stuff !

[robin_astro]

A remarkably precise observation. As the paper puts it     "....demonstrates the hundred-fold improvement of astrometry between SHARP in the 1990s (≈ 4 mas precision) and NACO in the 2000s (≈ 0.5 mas) to GRAVITY in 2018 (as small as ≈ 30 µas). "    

https://www.aanda.org/articles/aa/full_html/2018/07/aa33718-18/aa33718-18.html

Robin