What specific value is cited for the circumference of UY Scuti derived from the $1,708 R_{\odot}$ estimate in miles?
Answer
Nearly $4.634$ billion miles
The figure of nearly $4.634$ billion miles is the direct result of scaling up the Sun's circumference, cited around $2,713,406$ miles, by the larger early estimate of $1,708$ times the solar radius ($1,708 R_{\odot}$). This circumference measurement in miles is used as the baseline for several early hypothetical travel time calculations, such as the $364$-year projection for the TU-144. Conversely, the $2.463$ billion miles figure is associated with the smaller $909 R_{\odot}$ radius estimate used in the modern baseline calculation.

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