“I am the only person to ever ace a 1951 USAF resolution test. My 'to observe' list says 'done'. I do not use charts or atlases when I starhop; men do not use maps. One of my sketches won an SBIG deep sky imaging contest. I am the life of star parties I have never attended. I never say anything looks like a faint fuzzy - not even a faint fuzzy. Pilots aim green laser pointers at me. Don Pensack proofreads my CN forum posts.” - The Most Interesting Astronomer in the Universe
Quote:Currently? I'd rate Sirius as a 5/10 and Rigel as a 3/10 in a 3" or larger scope at ~100x.
Sirius B was easy and obvious under 6/10 seeing skies in a 3" f/6 LOMO triplet at just 70x last Friday night at ~34-deg N (Mojave Desert in California).
Difficulty in a 10-incher, likely has more to do with seeing, collimation and thermal stability of the scope, not the magnification and certainly NOT the aperture.
I want to do more then just look.
Norme 150mm MCT f/13, 31% CO Yellow Zone "People say I'm in denial. I disagree."
Thomas Watson - Author of Mr. Olcott's Skies. Available in paperback and ebook formats. Weblog: Under Desert Stars "And Now a Word From Our Sponsor"
Quote: Over the years I have split some very tight unequal double stars but never split Sirius and let me tell you I have tried many times with a variety of telescopes under a variety of conditions. The original poster should not be disappointed that the split was not made, it is tough. Jon Isaacs
the very source and font of day is dashed with isles of wandering night--Tennyson
Quote:Quote: Over the years I have split some very tight unequal double stars but never split Sirius and let me tell you I have tried many times with a variety of telescopes under a variety of conditions. The original poster should not be disappointed that the split was not made, it is tough. Jon Isaacs Last couple of nights I've had excellent seeing from central AZ. I was able to see the pup with 8" f/6 at 400x without undue difficulty. I also spied it for a brief period using a 7.3" @ about 460x. It was getting pretty dim in the smaller scope. Didn't really try at lower magnifications. Currently, these are the smallest scopes I definitely have seen it through though I thought I saw it years ago when it was much closer but with absolutely superb conditions and a super 6". I recall I couldn't see it with anything but a beautifully polished Zeiss eyepiece.Best,--Mike Spooner
Quote:This season I learned to find the Pup with my 16" Spooner refigured Meade mirror. (Thanks, Mike!) Afterwards, it has become easy to find with my 5" refractor with very good seeing. Rigel B is way much easier to split because of the much less difference in magnitude from the primary.
Scopes: 10" dob Antares Optics 1/30 wave secondary/Moonlite CR2, 13.1" home made truss dob Discovery optics, 4" achro (the banger)
"I like to watch"