That’s one and a half billion astronomical units. The star in question is twice the sun’s mass, and, I guess, not too dissimilar in size. If so, if you had a camera that could take a 1,000,000,000 by 1,000,000,000 pixel photo of our sun from the earth and pointed it at this star, that star would fill a single pixel (Likely a few more more due to imaging imperfections, but those would mean the light gets smeared out)
It typically takes multiple ‘photos’ to even get a single of those CD observations in a frequency range (https://en.wikipedia.org/wiki/S2_(star)#S0–102: “At one-sixteenth the brightness of S0–2, S0–102 was not initially recognized because it required many more years of observations to distinguish it from its local infrared background”
That’s one and a half billion astronomical units. The star in question is twice the sun’s mass, and, I guess, not too dissimilar in size. If so, if you had a camera that could take a 1,000,000,000 by 1,000,000,000 pixel photo of our sun from the earth and pointed it at this star, that star would fill a single pixel (Likely a few more more due to imaging imperfections, but those would mean the light gets smeared out)
It typically takes multiple ‘photos’ to even get a single of those CD observations in a frequency range (https://en.wikipedia.org/wiki/S2_(star)#S0–102: “At one-sixteenth the brightness of S0–2, S0–102 was not initially recognized because it required many more years of observations to distinguish it from its local infrared background”