Quote:
Originally Posted by Allan
Sirius is one of those targets I check every time I go out. I use it as a gauge for the sky conditions. I think it was Matt who said it, but once you've seen the pup you can't help but to see it every time, as long as the seeing co-operates.
Seeing is the most important factor, and it helps that it passes through zenith here in Oz. Aperture isn't so important, but quality is. The best view I've had of the pup was in my 5" Tak. I can see it ok in my 4" NP101, but the few times I've tried in my TV85 I couldn't see it. But I haven't been able to see the F star in the trap with the TV85 yet either.
The split is large and the pup is fairly bright at mag 8. It's all about how much scatter Sirius is throwing up in your telescope/eyepiece combination, that will determine how easy the pup is to see.
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Hello Allen, great to have your input.
There's been discussion on minimum aperture; do you think that maybe you and all here, may have established that around 100mm could well be the minimum aperture required here in Sydney at least , given that Sirius is also so high in the sky, and a lot easier than some will face.
Seeing of course , but not so much it seems if you have a good 12" like Adrian , you stand a better chance, especially if you 've done it before; this definitely seems to help in the search again .
Scattering also is an issue at the EP , but having high quality optics especially APO's is also an advantage it also appears.
Cheers bigjoe.