Science Truth can be wierder than Fantasy...

[Redrobes]

If the nearest asteroid has a period of 10hrs then that makes it about 20,000 km away. If your asteroid was 175km long then it would have the same diameter as our moon at about 30 arc minutes. So if you think the asteroid is too small to eclipse stuff then fair enough but I was thinking of something pretty big. Even if this asteroid was say 10km across then it would still have 1/15th the moon diameter which is still a discernible blob shape in the sky. Hope my math is right here I have seen the ISS plenty of times and its bright but pretty point like without a scope. Well its just my wild imagination making the asteroid vast enough to be worthy of a trip from Bruce Willis I guess.

This pic is our asteroid sizes compared to our moon
http://en.wikipedia.org/wiki/Image:M...ds_1_to_10.svg

so given that our moon is 20x farther than your asteroid orbit then odds on that any of these would be pretty blobby.

[Michael Morris]

If the nearest asteroid has a period of 10hrs then that makes it about 20,000 km away. If your asteroid was 175km long then it would have the same diameter as our moon at about 30 arc minutes. So if you think the asteroid is too small to eclipse stuff then fair enough but I was thinking of something pretty big. Even if this asteroid was say 10km across then it would still have 1/15th the moon diameter which is still a discernible blob shape in the sky. Hope my math is right here I have seen the ISS plenty of times and its bright but pretty point like without a scope. Well its just my wild imagination making the asteroid vast enough to be worthy of a trip from Bruce Willis I guess.

This pic is our asteroid sizes compared to our moon
http://en.wikipedia.org/wiki/Image:M...ds_1_to_10.svg

so given that our moon is 20x farther than your asteroid orbit then odds on that any of these would be pretty blobby.

Thing is, the larger the asteroids the more gravitation they exert on the system. Their presence is pragmatic - our own world has 5 visible companions in the sky in astrology, yet Carthasana has only 2 sister planets. Planets beyond her own orbit aren't possible because of the gravitational interaction between the two suns. It might be fun to put a "hot" Jupiter around the cold sun so that it would be visible as following star that follows it's sun and never moves too far away as observed from Carthasana. How bright a Jovian sized planet in orbit around a star would be in the Carthasanan sky is hard to tell - if I had to guess around magnitude 2, but how far away would it be (again I'd guess no more than twice the width of the moon as seen in the night sky).

Anyway the asteroids are mainly there to make astrology interesting. For that role they do not need to exceed a kilometer or so in size.