Uncharted System 1702 was a star system in the Alpha Quadrant.
In 3191, this system's location was labeled on a star chart. (DIS: "Red Directive")
In 3196, during the Omega-47 crisis, the location of Uncharted System 1702 was depicted on star charts and readouts used across several locations on the USS Athena to locate, monitor, and respond to the Omega-47 mines laid by the Venari Ral. This system was outside the affected region. (SA: "Rubincon")
This star system was only mentioned in writing.
The star chart seen in the episode of Discovery is based on the chart "United Federation of Planets I" from the Star Trek: Star Charts. The position that Uncharted System 1702 occupies is identified in the chart as Heathercrist.