Figure 2. Primary-centric orbital geometry of S4716 around Sagittarius A*. The black cross marks the position of the primary (Sagittarius A*) at one focus of the ellipse. The orbit is shown using the observed pericenter distance r_peri ≃ 99 AU and apocenter distance r_apo ≃ 706 AU, corresponding to a ≃ 402.5 AU and e ≃ 0.75. The locations of pericenter and apocenter are indicated. This figure emphasizes the primary-centric configuration used in the PCF analysis. [Credit: Author]

From

A Fast-Orbiting Star as a Probe of Relativistic Dynamics Near the Galactic Center

Bijay K. Sharma

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