5B
# 5B

5B or 5-B may refer to:

## Entertainment

* Studio 5-B, a 1989 short-lived drama series about a Canadian TV news channel
* 5B, the production code for the 1978 Doctor Who serial The Pirate Planet
* 5B (film), a 2018 documentary about the AIDS crisis by Dan Krauss and Paul Haggis

## Numbers and computing

* 5B is hexadecimal for 91 (number)
* 5B is the ASCII code for "["
   * Thus, %5B is URL encoding for "["

## Space and space exploration

* Corot-Exo-5b, an extrasolar planet
* WASP-5b, an extrasolar planet
* Little Joe 5B, an unmanned Launch Escape System test of the Mercury spacecraft

## Other uses

* Boron $(_5B),$ a chemical element
