S1

S1 — Galactic Centre star orbiting Sagittarius A*, explore its interactive 3D model in Cosmoscope.

Explore S1 in 3D around Sagittarius A*. Follow its modelled orbit using published VLT orbital measurements.

S1 is one of the measured stars orbiting Sagittarius A*, with a fitted orbital period of 166 years. Cosmoscope propagates its published orbital elements with a Keplerian model; the stellar appearance and size are illustrative.

Orbital period

166 years

Eccentricity

0.556

Angular semi-major axis

0.595 arcseconds

Orbital source

Gillessen et al. 2017, VLT/NTT astrometry

Explore S1 in 3D

Explore S1 on its fitted orbit around Sagittarius A*. The timeline propagates the published VLT orbital elements using a Keplerian model, so the orbit is a scientific reconstruction rather than live camera footage.