What I want to know most is how bright a star would have to be to be visible during the day. I know this depends on two things:
Thus, I want a forumal rather than a number.
As far as I understand, there are optical-wavelength astronomical techniques that are within square arcminutes of the sun by obscuring the disk of the sun. In fact, partial solar "occultation" can be used to observe transit across the sun. So, as a card-holding member of the Guild of Mischievous Intent, I would like to know, again formulaicly not numerically, how large an object would have to be to block the appropriate amount of light to make a star visible during the day.
- the position of the sun
- the apparent magnitude of the star
Thus, I want a forumal rather than a number.
As far as I understand, there are optical-wavelength astronomical techniques that are within square arcminutes of the sun by obscuring the disk of the sun. In fact, partial solar "occultation" can be used to observe transit across the sun. So, as a card-holding member of the Guild of Mischievous Intent, I would like to know, again formulaicly not numerically, how large an object would have to be to block the appropriate amount of light to make a star visible during the day.
via JREF Forum http://forums.randi.org/showthread.php?t=263935&goto=newpost
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