Ophiucus VI
Ophiucus VI was the inhabited sixth planet in the Ophiucus system of the Alpha Quadrant.

In the mid-23rd century, Harry Mudd visited Ophiucus VI, where he conned two miners out of a year's supply of dilithium crystals using fake Federation vouchers. ()

Background information 

This planet's quadrant of origin is inferred based on the position of its star system as seen in the star chart appearing in the   episode .

Ophiucus VI was an early name for the planet which became Ophiucus III. As such, Ophiucus VI was repeatedly referred to in the final draft script of . In the novelization of "Mudd's Passion" (as published in Star Trek Log 3), Harry Mudd referred to this planet as a "charming frontier world."

According to Star Trek: Star Charts (pp. 18, 19, & 44; "United Federation of Planets I") and Stellar Cartography: The Starfleet Reference Library ("Federation Historical Highlights, 2161-2385"), the Ophiucus () system was located in the Ophiucus sector (Sector 008).

it:Ofiuco VI
Ophiucus 06