Hen scared of of the nest

[the Fowler]

So my hen had a hidden nest and I was weed eating and scared her off the nest...I know it's impossible to know if she will return, but how long do I have til I need to retrieve the eggs and get them in the incubator? It is sunny and 84 degrees

 

[aart]

So my hen had a hidden nest and I was weed eating and scared her off the nest...I know it's impossible to know if she will return, but how long do I have til I need to retrieve the eggs and get them in the incubator? It is sunny and 84 degrees

Do you have any idea how long she's been on the nest?
Is she actually brooding them or just laying eggs there and returning to coop to roost at night?
Is the nest in the sun?
Probably a few hours will be fine, maybe longer.