Posted 10 November 2012 - 08:03 PM
Posted 10 November 2012 - 08:51 PM
We did the H400 in about a year. Using a 17.5 and 12.5 Dobs. We also had digital setting circles and a very dark site 30 minutes from the house and another observatory at the house in suburban skies.
I would start with at least a 12 inch. Save the more difficult objects for a 16. Enjoy the ride it just may take you longer to complete the list.
For three of us we tried to complete the list as quickly as possible. Good thing.....we lost one to a brain tumor.
There were three of us. One punched the DSC and moved the telescope while the another looked through the eyepiece. The third took the first set of notes and then everybody got a chance to view the object.
Best night was over 100 objects.
Posted 10 November 2012 - 08:58 PM
Posted 10 November 2012 - 09:16 PM
Posted 10 November 2012 - 09:28 PM
Posted 11 November 2012 - 01:14 AM
As one who is starting the Herschel 400 with an SE8, I wonder how much "easier" (or improved viewing) would the Herschel 400 be in a 10" dob than an 8" SCT? Would the 10" give significantly improved viewing? Or would one need to increase the dob size to 12"?
I did the entire list with an 8 inch f/7 Newtonian way back in the mid 1980's without too much trouble. A larger aperture might make things a little easier, but in point of fact, if you like a challenge, the whole list has been done with a considerably smaller aperture. Clear skies to you.
Posted 11 November 2012 - 02:24 AM
Really though it will all depend on where you intend on chasing this list. If the sky is dark enough then as said, much smaller apertures have completed this list but that was by very experienced observers.
Me, I have seen most of the H400 (including NGC 6118 and NGC 6540) with my 6 inch dob. As I now work on the entire H2500 using my 12.5 and 20 inch scopes I find any that are on the H400 list to be extremely obvious while many of the others don`t always stand out.
So as I previously stated, just get on with it with what you`ve got. 8 inches is more than enough to get the job done and in the end you will be a better observer for it.
Posted 11 November 2012 - 07:52 AM
I would suggest starting with your 8", get as many as you can,
and move up in size if necessary
Posted 12 November 2012 - 02:36 PM
Posted 13 November 2012 - 05:45 PM
Posted 13 November 2012 - 06:01 PM
I think o'Meara did the list with a 4" refractor and really dark skies. I say go for it. I wussed out and did mine with a 12.5" dob, it would have been more of a challenge with my 8" SN.
He did. And the occasional Barlow. Not too shabby for a self-professed lunar/planetary observer. Sure, it was an old TV f/5 Genesis refractor, usin a 22mm Pan, 7mm Nagler, and 4.8mm Nagler. And a 1.8x or 3x Barlow for some planetary nebulae, plus a sturdy Gibraltar mount. But as he also notes, the members of the Ancient City Astronomy Club designed the list for 6" reflectors and up under somewhat light-polluted skies. Otherwise, he reckons his equipment/conditions (from Kilauea for the project) to be about what one can expect from an 8-10" SCT under suburban skies.
I'd say yer about as ideally situated as you can be for the task, even from a purist's vantage point. Couldn't have dialed it in better if you'd tried!