http://science.nasa.gov/headlines/y2002 ... eships.htm
Da schreibt Tony Phillips doch glatt, dass die ISS heller ist, als das Shuttle. So wird es vielleicht in der Endausbaustufe sein, aber noch ist das Shuttle deutlich heller. Was man immer bei heavens-above nachschauen kann.
Naja, ich hab mal schnell in die USA geschrieben und bin jetzt auf die Antwort gespannt.
Gruß
Ulrich
seltsam, schon wieder ein dicker Fehler bei Science@NASA
-
Ulrich Rieth
...und hier die Antwort :-)
Dear Ulrich,
When I first read your message, I couldn't believe it. But I checked
heaven's above and you're right, Atlantis is about 0.5 magnitudes brighter
than the ISS during the coming flybys. In fact, the first image in the
story, which shows the ISS and the shuttle together, reveals the same
thing: the shuttle is much brighter.
Thanks! I'm repairing the story now.
At 06:33 PM 10/16/2002 +0200, you wrote:
>Hi Tony!
>
>Nice article you just released, but there is a point that is not true.
>
> > The space shuttle is smaller than the ISS and, thus, dimmer.
> > You'll probably spot the ISS first.
> > As soon as you do, look around the sky for the shuttle.
>
>The dimension are correct, but the effect is not correct.
>The shuttle still is much brighter than the space station during the visible
>passes.
>I think this is because of the bright white color of the shuttle if compared
>to the more silver color of the ISS modules.
>So it is, as always, just a matter of albedo.
>Perhaps you should correct this, as the people cannot distinguish the two
>"dots in the sky", if they don't look with a telescope.
>Actually there is one single chance that the ISS can outshine the shuttle.
>And this happens during those very nice ISS flares, when one of the solar
>panels reflects the sun directly towards the observer. But those flares are
>not yet in the predictions on heavens-above.com. I have seen 2 or 3 of them
>and only during these occations the ISS reached magnitudes brighter
>than -4mag, which should be about the magnitude of Venus.
>Best regards
>
> Ulrich
Dr. Tony Phillips, editor
Science@NASA http://science.nasa.gov
SpaceWeather.com http://spaceweather.com
(760)873-5585
When I first read your message, I couldn't believe it. But I checked
heaven's above and you're right, Atlantis is about 0.5 magnitudes brighter
than the ISS during the coming flybys. In fact, the first image in the
story, which shows the ISS and the shuttle together, reveals the same
thing: the shuttle is much brighter.
Thanks! I'm repairing the story now.
At 06:33 PM 10/16/2002 +0200, you wrote:
>Hi Tony!
>
>Nice article you just released, but there is a point that is not true.
>
> > The space shuttle is smaller than the ISS and, thus, dimmer.
> > You'll probably spot the ISS first.
> > As soon as you do, look around the sky for the shuttle.
>
>The dimension are correct, but the effect is not correct.
>The shuttle still is much brighter than the space station during the visible
>passes.
>I think this is because of the bright white color of the shuttle if compared
>to the more silver color of the ISS modules.
>So it is, as always, just a matter of albedo.
>Perhaps you should correct this, as the people cannot distinguish the two
>"dots in the sky", if they don't look with a telescope.
>Actually there is one single chance that the ISS can outshine the shuttle.
>And this happens during those very nice ISS flares, when one of the solar
>panels reflects the sun directly towards the observer. But those flares are
>not yet in the predictions on heavens-above.com. I have seen 2 or 3 of them
>and only during these occations the ISS reached magnitudes brighter
>than -4mag, which should be about the magnitude of Venus.
>Best regards
>
> Ulrich
Dr. Tony Phillips, editor
Science@NASA http://science.nasa.gov
SpaceWeather.com http://spaceweather.com
(760)873-5585
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