You are not logged in. [Login] Entrance · Main Index · Search · New user · Who's Online FAQ · Calendar

Observing >> Double Star Observing Previous   Index   Next   Threaded

Pages: 1 | 2 | (show all) John Van Allen journeyman Reged: 01/24/12 Loc: Dominican Republic Re: Rigel B vs. Sirius B [Re: TegiriNenashi]       #5678847 - 02/14/13 06:46 AM Edit   Reply   Quote Quick Reply   At my location here in the Dominican Republic Sirius is nicely placed for observing at around 54° altitude at around 1030 at night. Using my Questar 3.5 with an 8mm eyepiece and the 2x internal lens I believe I saw the pup once but still have a question mark in my log book. The city of Santo Domingo has a lot of light pollution as well as other kinds of pollution. There are some very high mountains here and I am planning a trip to do Sirius Splitting (no pun intended), Rigel is easy with the Q and with an O111 filter even easier. I believe I saw the pup using this filter but with only 3.5" aperature the images get very dim. One other thing is at play here, the age of my eyes. At 66 my eyes aren´t the same as at 26 and after a few minutes of intense concentration they start misbehaving like watering. Finding the sweet spot in the eyepiece is tricky with the mileage these eyeballs have. Any suggestions re eye exercises, vitamins, etc would be appreciated. Regards John Post Extras:       nirvanix Pooh-Bah Reged: 06/07/07 Loc: Saskatoon, SK Re: Rigel B vs. Sirius B [Re: magnus]       #5679189 - 02/14/13 11:05 AM Edit   Reply   Quote Quick Reply   Rigel B turns out to be an excellent measure of seeing conditions for me. When seeing is excellent I can split it at ridiculously low powers, but when seeing is really bad can't split it at all because daddy is doing the flash dance all over the place. I wonder if there is a linear relationship between magnification needed for the split and seeing? Maybe I'll get out some graph paper and find out. Post Extras:       Pete-LH sage Reged: 03/25/09 Loc: Wilmington, DE Re: Rigel B vs. Sirius B [Re: lionel]       #5680712 - 02/15/13 06:04 AM Edit   Reply   Quote Quick Reply   Hi everyone and Lionel, No success yet ... Rigel has been no problem even down to a 60mm f/11. Quite beautiful so I've given it a shot every time out this fall to get an idea of the conditions. I've tried Sirius in the past with no luck but was inspired by the posts here so I thought I'd give it a Sirius (sorry) try last night. I set up my FS-102 and with a 5mm Ortho thought I caught a glimpse briefly. To reduce the glare I stopped down with the Tak manhole cover and had a beautiful Airy disc with two concentric diffraction rings. I stared at it for a while but no Sirius B. So I went on to Beta Monoceros which I've been obsessed with lately, then over to M48 and called it a night. The spirit was willing but the body was weak and my bed was calling. Lionel, Fred is talking about the RV lot on Sunday so maybe we can give it a shot there? Post Extras:       Pages: 1 | 2 | (show all)

Previous   Index   Next   Threaded

Extra information 1 registered and 1 anonymous users are browsing this forum. Moderator:  PJ Anway, RLTYS  Print Thread Forum Permissions       You cannot start new topics       You cannot reply to topics       HTML is disabled       UBBCode is enabled Thread views: 3707 Jump to *Announcements and News* -----   Cloudy Nights Announcements   Discussion of CN Articles, Reviews, and Reports   Celestial Events*General Astronomy* -----   Beginners Forum   General Observing and Astronomy   Outreach   Light Pollution*Equipment Discussions* -----   ATM, Optics and DIY Forum   Binoculars   Binoviewers   Cats & Casses   Classic Telescopes   Equipment   Eyepieces   Mounts   Observatories   Reflectors   Refractors    Video and Electronically Assisted Astronomy*Astrophotography and Sketching* -----   Beginning and Intermediate Imaging   Film Astrophotography   DSLR & Digital Camera Astro Imaging & Processing   CCD Imaging & Processing   Solar System Imaging & Processing   Sketching   Astro Imaging/Sketching Contest *Observing* -----   NEO   Planetary and Solar System Observing   Lunar Observing   Deep Sky Observing   Double Star Observing   Solar   Variable Star Observing and Radio Astronomy*Telescope Specific Forums* -----   Celestron NexStar    NexStar GPS / CPC Telescopes   Questar Forum   Meade ACF/RCX / LX / GPS    Meade ETX*Speciality Forums* -----   Arizona Science and Astronomy Expo   NEAF (Northeast Astronomy Forum) and NEAIC (Northeast Astro Imaging Conference)   AstroArt   Astronomy Clubs and Star Parties   Astronomy Software & Computers   AstroWebsites   Science! Astronomy & Space Exploration, and Others   Space Rocks   Stellar Media*Swap and Shop* -----   Shop and Swap Audio Components*CN Feedback and Vendor Announcements* -----   Vendor and Group Announcements*International Year of Astronomy 2009 - Forums are now closed.* -----   IYA Archive Info

CN Forums Home