Distant Object Resolution

The cluster discusses visual perception, angular resolution, and distance estimation of distant objects like satellites in telescope images or videos, factoring in diffraction, atmospheric effects, and viewing distance.

📉 Falling 0.4x Science
1,967
Comments
20
Years Active
5
Top Authors
#8383
Topic ID

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Keywords

e.g ISS THAT FOV NYC distance miles distances degrees miles away beam horizon eye away light

Sample Comments

baq • Jan 19, 2020 • View on HN

the parent already posted it but it's worth repeating - you're seeing the effect of multiple miles of air between the object and the lens.

t0 • Sep 27, 2013 • View on HN

Probably the distance from your eye.

eviks • Mar 15, 2025 • View on HN

This doesn't help much since visual perception doesn't depend just on this distance

jdmichal • Mar 15, 2021 • View on HN

That's a terrible projection to be judging distances with...

domcat • Sep 26, 2024 • View on HN

Looks like far away is more reasonable.

zamadatix • Nov 13, 2025 • View on HN

It depends on viewing distance as well.

TheSpiceIsLife • Mar 25, 2017 • View on HN

Can you tell us at what distance the theoretical 1.22e-4 radians would apply. I suppose you mean something like regular screen-viewing distance.

amelius • Mar 9, 2022 • View on HN

Does this mean that objects that are on a trajectory out of the view have less resolution?

kjkjadksj • Sep 12, 2023 • View on HN

If you were at such distance from the earth, what would be resolvable?

kswillister • Dec 17, 2018 • View on HN

when you say "a single pixel" here I believe you mean a very small angular diameter