Challenging double near Jup
Posted 07 January 2013 - 12:52 AM
Posted 07 January 2013 - 03:12 AM
Posted 07 January 2013 - 09:12 AM
Posted 07 January 2013 - 02:37 PM
Posted 07 January 2013 - 07:19 PM
Posted 07 January 2013 - 11:11 PM
It was a terrific view - nice intermittent diffraction rings sharpening with clarity now and again. I tried high mag of 450x and. Like your experience it was too mushy. The 240x was much cleaner.
Satisfying to find that so close to an already great object!
Posted 08 January 2013 - 02:18 AM
Posted 08 January 2013 - 11:06 AM
Posted 08 January 2013 - 12:20 PM
Posted 08 January 2013 - 06:33 PM
Posted 08 January 2013 - 06:49 PM
This suggests very good air steadiness and high visual acuity by Larry. Maybe the "small aperture" syndrome as well? Larry, feel free to add further information.
Darren - yes, it appears that 8-inch helps for seeing the companion as "blue" - at mag 8.6 that's not too surprising, though Ed D saw the colour in the secondary with his 6-inch Newtonian. I expect individual observers have different threshold points on star brightness, where colour is perceived vs the star looking grey ("ashy" was a term often used in the 19th century). It's the well-known phenomenon of "all cats are grey in the dark".
Posted 08 January 2013 - 09:13 PM