Why was the planet hidden?

From what I can tell from The Passing, it was not even recognised as a significant planet on the engineers map. For whatever reason ( this is just a guess) the Engineers may have cloaked it, which is why Weyland Industries missed it. I get the impression that there is more of a back story behind the existence of this outpost. David and Shaw knew of its existence, but nothing has been established as to how they knew it was significance. The way Prometheus has jumped to Covenant certainly leaves a big gap in the whole storyline imo.

Secrets everywhere...

it's a long ways out, and only so much can be gleaned even with the most advanced astronomical observations.

Also, we know little about the number, type, orbital paths of the system, it might have been occluded from Sol by a gas giant, either in orbit of such or that hypothetical gas giant could have been in an orbital position to block it.

In my works, as an example, the planet of Shadowfall in the Lakota system was never detected by astronomy except by sheer chance due to the complex dynamics of that star systems structure as well as some nebulae between Sol and Lakota.

Cloaked?  ...or Plot Hole?  YOU decide..!

Please spill lol 

Oram offers up some insight of his own in the Novelisation. He says its "view is obviously blocked from Earth. Dense nebulae, dust cloud, periodic flares screening out the infrared- maybe when the searcher for this sector made its pass, this world was at perihelion, on the opposite side of its star from Earth. Or the whole system could have been positioned exactly behind an intervening star or two. Not to mention the tricks that gravitational lensing can play with planetary scanners."

I think the Engineers dwelling there may have felt quite comfortable that they were hidden away from any prying eyes, which may go some way to explaining why their welcome of the Juggernaut seems to have been without an ounce of worry that it could have been anybody but Engineers returning.

Well the Novel does explain a lot more... Prometheus draft likewise did with Prometheus... but Ultimately to film them word for word would take up more Screen time and so cuts are made to a Final Screen Play Shooting Draft..

And usually better explanations for potential Plot Holes then go missing.

As far as Engineers however... if feel they simply felt the Worlds they Seed and Kept in check are kept to a degree where they pose no Galactic Threat.

They did not indeed to Evolve Mankind to be able to learn how to Reach the Stars.. it even seems they (Hierarchy) impose limitations on their own kind (beings on Paradise) and the Engineers/Elders/Hierarchy simply feel that without their Help their created Humanoids will never be able to Master Space Travel.

In Hindsight this has come back to Haunt them Big Time.

EWATYAMORPH

All that plus a neutronic wavefront ie. plasma energy storm from the neutron storm activity in the area.

Okay.  How about this.

The Covenant mission took ten years to plan according to the novel.  So, the Prometheus mission was being done as Covenant was being planned.  David knew about the Covenant mission as well.  So, once David is back together and Shaw is in hypersleep, David contacts Mother to have Paradise overlooked because he knows there are Engineers on the planet and he doesn't want to lose his chance of being in control of what he finds on the planet.  In Prometheus, we see he is experimenting and learning about the black goo.  So, he just doesn't want the information to be out there because then he would be swept aside and then he only be able to read about that information about the black goo and engineers, if he is lucky to.  He might find out some information there himself actually before other people show up.  So, he does kills off the "Engineers" (or whatever they are) and nobody notices until the Covenant mission arrives.  So, David crashes on the planet and is learning all kinds of things about the "Engineers" and he needs more experiment subjects.  So, he gets Mother to fake that Origae-6 to look like a habitable world so that they pass by Paradise to receive the signal.  The only reason Tennessee heard it was because his suit got the direct signal.  On the Covenant, the signal was still going through processing.  It explains why the Covenant didn't pick that up (at first) better in the novel.  Now, the Covenant makes an unplanned stop to explore Paradise and NOT colonize it.  This means David now has complete control over who and how he experiments on because most of the ships passengers are in hypersleep.  David has this much power because he inherited Weyland Corp. from Weyland himself.  Weyland did say that he was the closest thing he had to a son and David was with Weyland for a LONG time, so, in a way, David is like Weyland reincarnated (at least in Weyland's eye's).  David and Mother could be working together, but David is in control.

Also, maybe the neutrino burst was predicted in a way.  Our sun goes through cycles where it is more active for some years and not as active other years.  Maybe the Weyland Corp. had a secret machine that could predict solar flares much more in advance than we have today with our sun (which is around 3 days) and knew the star would be in an active cycle.  So, David planned the trip in a way where the sun had a very high chance of emitting a flare and would affect the Covenant. 

EWATYAMORPH@ "Oram offers up some insight of his own in the Novelisation. He says its "view is obviously blocked from Earth. Dense nebulae, dust cloud, periodic flares screening out the infrared- maybe when the searcher for this sector made its pass, this world was at perihelion, on the opposite side of its star from Earth. Or the whole system could have been positioned exactly behind an intervening star or two. Not to mention the tricks that gravitational lensing can play with planetary scanners."

Boooorrrring.  LOL

I bet that the planet was a common bawdy house, and David didn't want to get busted by the police.

I think passing off why the planet was hidden because of gravitational waves and because it is a very active area looks to shallowly into why it was hidden.  The planet may have been chosen by the Engineers because of that reason so they could be safe.  Also at the end of Covenant, David had a code for the Mother to accept.  Also, when David was asked what he was doing on Paradise, he replied, "Waiting for Mother."  I think David might be part of the reason why that planet wasn't found.

So it was around the corner so we couldn't see it hmm... pretty sure they would scan from more than multiple angles and at different times...i would guess engineers hid it or the ion storm did... but if i were to theorize an idea it would be that paradise is a place of not much defence or technology so the hide it...a bit like monks... :D