Shouldn't orbital period be the same as rotational period when a body is tidally locked?

Is this one bugged or am I missing something?

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Is this one bugged or am I missing something?

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As already mentioned, tidal locking only reflects that the body is in a fixed rotational ratio compared to the body it's orbiting. We are all familiar with tidal locking at a 1:1 ratio, because that's the one we are most familiar with because of the moon, but even in our solar system we have tidal locking that's not a 1:1 ratio, Mercury is in a 3:2 tidal resonance with the sun, it rotates three times for every two orbits. In Elite both 1:1 and resonance locks are described as tidal locking, you will see a lot of them once you start looking, it's not that uncommon in the universe I would suggest.

Your situation here doesn't immediately calculate down to a resonance but that's probably because we are only getting single decimal point accuracy, it looks like a 66:1 resonance as Sysmon suggests.
 
What you're missing here is that Merlin is considered a moon of Aster, and they are tidally locked to each other. More commonly you see binary pairs that both have the same rotational period and orbital period. In the less common case where a planet is tidally locked to its moon, the rotation period is the same as the moon's orbital period, but the planet's orbital period is still the length of its "year".
 
As already mentioned, tidal locking only reflects that the body is in a fixed rotational ratio compared to the body it's orbiting. We are all familiar with tidal locking at a 1:1 ratio, because that's the one we are most familiar with because of the moon, but even in our solar system we have tidal locking that's not a 1:1 ratio, Mercury is in a 3:2 tidal resonance with the sun, it rotates three times for every two orbits. In Elite both 1:1 and resonance locks are described as tidal locking, you will see a lot of them once you start looking, it's not that uncommon in the universe I would suggest.

Your situation here doesn't immediately calculate down to a resonance but that's probably because we are only getting single decimal point accuracy, it looks like a 66:1 resonance as Sysmon suggests.

Ah I see. Though one thing that bothers me and I'm not sure if I just did it wrong the third time but I think the first 2 times I did jump into the system from Bernards Star the planet was really nicely in view as you drop from Hyperspace with the planet right in your view kinda zooming you by. By the time I completed some missions it appeared to have moved away. Though it probably still wouldn't have moved so much as it looked like even if its orbital period was only 3 days, I could've possibly messed up the system and it's in fact not Bernards Star you're supposed to do the jump from.

But yeah good to know about Elite displaying resonance systems as tidally locked.

What you're missing here is that Merlin is considered a moon of Aster, and they are tidally locked to each other. More commonly you see binary pairs that both have the same rotational period and orbital period. In the less common case where a planet is tidally locked to its moon, the rotation period is the same as the moon's orbital period, but the planet's orbital period is still the length of its "year".

Is this the one the correct answer then? Gonna have to check.
 
Good luck! One thing worth noting is that it is in one of the hand-crafted ED systems, so there's a chance of squirrely stuff going on.

:D S
 
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