[TML] The Sky at Night?

[John Kwon]

On 12/3/07, Patrik Holmstrom <patrik.holmstrom at gmail.com> wrote:
>
> On Dec 3, 2007 1:07 PM, Timothy Little <tim at little-possums.net> wrote:
> > On Mon, Dec 03, 2007 at 11:18:44AM +0000, Ewan Quibell wrote:
> > > Would the F7 V just look like a bright star or would it produce
> > > something like moon light?
> >
> > It would illuminate about the same as a bright full moon, yes.  It
> > would be a very dazzling star, apparent magnitude probably about -13.
> > I don't think it would actually be dangerous to look at: despite the
> > pointlike focus on the retina, the light passing through the pupil
> > would be less than a microwatt.
>
> That looks like it is in the ballpark. Assuming a luminosity of 2.1
> sol I get an apparant magnitude of -14.5 or 6 times brighter than mean
> full moon luminosity (-12.6).
>
>
So we wouldn't need night vision devices, and we could read our comp-pads
without using the backlight.