EDMarketConnector VS EDDiscovery

That system doesn’t appear in EDSM. Apparently you are not running an EDDN updater. You should. EDDiscovery, EDDI and EDMC are commonly used tools. They also do lots of other things; the most lightweight variant for just uploading data is EDMC. They can also upload your stats, fleets, materials, discovered systems and whatnot to EDSM and Inara. Those are pretty handy sites, too.

EDDiscovery

That's one of the things I like about EDDiscovery's text-to-speech plugin, when you're jumping to a system where you'll arrive at a white dwarf / neutron star it gives you an audible warning to throttle down during your hyperspace jump. Something along the lines of "Warning: star is dangerous. Throttle down now!"

EDDiscovery or EDMC to update the EDDN and have useful information at your fingertips. I prefer EDDiscovery, hugely useful for explorers. Link your account to keep your info up to date and keep the community up to date to allow nearly all these other tools to work.

YouTube, Reddit, and the forums are your friend, there are also many the third party sites and applications available to help you to navigate and locate facilities within the game. The most commonly recommended site is Inara and the applications recommended to support it are ED Market Connector or ED Discovery. The applications send market data that Inara use to keep track of the trade markets, they include search functions which help you to find what stations have what services, including what ships and modules are available. Inara can also track your commander data to if you make an account and link it to your Frontier account.

(In case you haven't done so yet I suggest running EDDiscovery or EDDLite so it'll be recorded/updated to EDAstro.)

On PC I was using EDD, which integrates with sites like Inara.cz

My personal choice at the moment is EDMC; it has plugin support with some being very useful for exploration. Already mentioned is EDDiscovery - this is a more 'full on' tool but it's packed with features. There's also a new-ish one I've not yet tried myself that's designed to be far more light-weight; EDDLite.

Oh also a great utility to have installed if on PC is EDDiscovery it provides a ton of information that can be very useful. If you ever setup accounts on 3rd party sites such as EDSM, Inara, Coriolis, ED Shipyard, ED Astro, or EDDN Network among others it can integrate with those accounts as well!

If you run ED Market Connector or ED Discovery in the background, they send the market data that Inara uses to track commodity prices.

EDDiscovery, Organic scans window/tab. It will also tell you the total value before the bonus.