Orbital Period
Orbital periods can be less than an hour (for AM CVn stars), or a few days (components of Beta Lyrae), but also hundreds of thousands of years (Proxima Centauri around Alpha Centauri AB).
Read more about this topic: Detached Binaries
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“To give an accurate and exhaustive account of that period would need a far less brilliant pen than mine.”
—Max Beerbohm (1872–1956)