In the Galactic Map, it would be helpful to show a JP where a sensor probe is located, e.g. placing a dot or a similar symbol next the connection line between the star systems, or changing the colour of a short piece of the connection line near the star system where the probe is.
As an alternative, having this information in one of the tabs of the Economics window (i.e., Summary, or Governor/Misc, or Constructs) for each body of a system can help too: a list of the JPs with some information about them: presence of jump gates/stabilisation, of a probe, of a minefield (and how many mines are present).
Or foreseeing some dedicated tabs at system level. In the Economics window, when we select the star name, the shown information doesn’t change. It would be helpful to have a resume of the system information instead.
SJW: Added for v3.0
Aurora v3.0.0 Patch Notes - Unreleased - #50 by AuroraSteve