That eerie frequency!  Tribute to the movie “Contact“, written by Carl Sagan.   The “hydrogen line” (which is the frequency of the spectral line created by hydrogen = 1420.40575 MHz) times pi (which is the ratio of a circle’s diameter to its circumference = 3.14159), which results in 4.4623 GHz, which is the frequency in which the Aliens transmitted their signal, which made Jody Foster go “Holy Shit”!