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Pages: 1 | 2 | (show all) Tom and Beth Carpal Tunnel Reged: 01/08/07 Loc: Tucson, AZ Porrima has gotten EASY       #5143332 - 03/27/12 03:04 AM Edit   Reply   Quote Quick Reply   Nicely spaced using a 140MM refractor and ~160X. Also tried to split Zeta Boo but the Atmosphere would only allow ~300X with the 10 inch, and at that it was barely elongated. Post Extras:       C_Moon Pooh-Bah Reged: 10/23/09 Loc: Virginia Re: Porrima has gotten EASY [Re: Tom and Beth]       #5143431 - 03/27/12 07:20 AM Edit   Reply   Quote Quick Reply   and quite a BEAUTY! I agree on the easier part. I remember some difficulty when trying to split in early 2010 when I first started, but some of that was contributed by my not knowing what I was doing Position angle should be fun to watch over the next few years as well. Post Extras:       desertstars Reged: 11/05/03 Loc: Tucson, AZ Re: Porrima has gotten EASY [Re: C_Moon]       #5143582 - 03/27/12 09:23 AM Edit   Reply   Quote Quick Reply   It was flat out impossible for me when I got back into this in '03. I've been watching it slowly change since then, and can now split it reliable on nights of average seeing conditions. It's been fascinating to watch it slowly change, from year to year. Post Extras:       Rutilus Pooh-Bah Reged: 12/17/10 Re: Porrima has gotten EASY [Re: desertstars]       #5144200 - 03/27/12 03:57 PM Edit   Reply   Quote Quick Reply   A very interesting double-star to observe over the years. Its been a year since my last observation, I need to check it out again in the next week. Post Extras:       SStoffer member Reged: 04/15/11 Loc: Grand Rapids, Michigan Re: Porrima has gotten EASY [Re: Tom and Beth]       #5156334 - 04/04/12 03:39 PM Edit   Reply   Quote Quick Reply   I tried last night, but atmospheric turbulence and viewing over my house roof made it difficult. I seem to observe an elongation of the image of the star, but I am going to have observe again under more favorable conditions to make sure of that claim. -Stephen Post Extras:       phily sage Reged: 12/18/04 Loc: Kent, UK Re: Porrima has gotten EASY [Re: SStoffer]       #5158721 - 04/06/12 08:10 AM Edit   Reply   Quote Quick Reply   It has certainly got easiER over the last few years, but poor seeing soon puts one in difficulties. Nice object though. Post Extras:       ggalilei professor emeritus Reged: 09/01/11 Loc: Kentucky Re: Porrima has gotten EASY [Re: phily]       #5159357 - 04/06/12 02:50 PM Edit   Reply   Quote Quick Reply   I had noticed too, even as compared to last year; I thought I was just getting better at it ..... It's still one of the prettiest pairs up there. Post Extras:       Denimsky professor emeritus Reged: 01/21/07 Loc: BC, Canada Re: Porrima has gotten EASY [Re: Tom and Beth]       #5160728 - 04/07/12 12:51 PM Edit   Reply   Quote Quick Reply   Thank you for the info Tom and Beth. For the first time, I looked at Porrima with my 4" f/8 refractor last nigth and it was beautiful sight. Post Extras:       caheaton Pooh-Bah Reged: 05/26/09 Loc: SW Ohio Re: Porrima has gotten EASY [Re: Denimsky]       #5165005 - 04/10/12 11:04 AM Edit   Reply   Quote Quick Reply   Thanks to this thread, I gave this one a try last night. Using the 80mm F/11 and a 4mm ortho (228X) I was able to just about split the pair (they seemed to be just touching...conditions weren't the best). They make a very pretty pair, striking me as yellow with attractive arcs of light (diffraction ring) to each side of the pair. Post Extras:       Asbytec Guy in a furry hat Reged: 08/08/07 Loc: La Union, PI Re: Porrima has gotten EASY [Re: caheaton]       #5165013 - 04/10/12 11:11 AM Edit   Reply   Quote Quick Reply   Porrima always gives me the impression of a car driving down a dark mountain side. All you can see is a pair of headlights in the distance. Post Extras:       Radim sage Reged: 11/06/05 Re: Porrima has gotten EASY [Re: Tom and Beth]       #5199924 - 05/01/12 11:20 AM Edit   Reply   Quote Quick Reply   Guys, yesterday had a great view of splitting Porima .... does anybody know the precise angular seperation in these days? Thanks Post Extras:       7331Peg Sirius Observer Reged: 09/01/08 Loc: North coast of Oregon Re: Porrima has gotten EASY [Re: Radim]       #5200312 - 05/01/12 02:55 PM Edit   Reply   Quote Quick Reply   It's slightly more than 1.8" right now. Here's a great source, based on WDS data (scroll halfway down to get a listing of separation and position angle by year, along with a chart of the orbit): Porrima John Post Extras:       PJ Anway Carpal Tunnel Reged: 06/04/03 Loc: North Coast Re: Porrima has gotten EASY [Re: 7331Peg]       #5203299 - 05/03/12 08:46 AM Edit   Reply   Quote Quick Reply   Porrima has definitely gotten easier. I've been able to split it the last few nights of pretty good seeing in my 75mm refractor at 167X and occasionally at 125X. Looking back over my notes, I had to use a 4" refractor at 333X in 2002 to get the same split. Post Extras:       desertrefugee Carpal Tunnel Reged: 08/06/07 Loc: Arizona Re: Porrima has gotten EASY [Re: PJ Anway]       #5229121 - 05/19/12 01:33 AM Edit   Reply   Quote Quick Reply   Not much else to say, but agree with folks on how much fun this one has been to follow. I've been steadily able to split it with smaller and smaller aperture. Tonight was absolutely easy with an f11 C80 (Celestron/Vixen) achromat. Last night I tried with a decent Japanese 60mm f15, but didn't get a split. Only a peanut. With a skinny waist. At a current separation of 1.9", that's right at the Dawes limit for a 60mm instrument. I'm on it. Post Extras:       JIMZ7 Pooh-Bah Reged: 10/22/05 Loc: S.E.Michigan near DTW Re: Porrima has gotten EASY [Re: desertrefugee]       #5229650 - 05/19/12 12:55 PM Edit   Reply   Quote Quick Reply   I haven't seen that star since the 1980's. I remember seeing it when it was at least 3.5" of arc seperation or was it more? Jim Post Extras:       desertstars Reged: 11/05/03 Loc: Tucson, AZ Re: Porrima has gotten EASY [Re: desertrefugee]       #5229955 - 05/19/12 04:28 PM Edit   Reply   Quote Quick Reply   Quote: Not much else to say, but agree with folks on how much fun this one has been to follow. I've been steadily able to split it with smaller and smaller aperture. Tonight was absolutely easy with an f11 C80 (Celestron/Vixen) achromat. Last night I tried with a decent Japanese 60mm f15, but didn't get a split. Only a peanut. With a skinny waist. At a current separation of 1.9", that's right at the Dawes limit for a 60mm instrument. I'm on it. Tried it with my 60mm the other night, as well. Not even close to split, and calling it a peanut would be an exageration (not the best seeing conditions), but there was clearly something going on. Watch this space. Post Extras:       Tom and Beth Carpal Tunnel Reged: 01/08/07 Loc: Tucson, AZ Re: Porrima has gotten EASY [Re: desertstars]       #5230159 - 05/19/12 07:49 PM Edit   Reply   Quote Quick Reply   OK, who did the Vulcan Mind Meld that has at least 3 Zonies trying this split with 60MM? Post Extras:       PJ Anway Carpal Tunnel Reged: 06/04/03 Loc: North Coast Re: Porrima has gotten EASY [Re: desertstars]       #5230164 - 05/19/12 07:54 PM Edit   Reply   Quote Quick Reply   Quote: Tried it with my 60mm the other night, as well. Not even close to split, and calling it a peanut would be an exageration (not the best seeing conditions), but there was clearly something going on. Thomas, I'll try it with my "big" 63mm tonight and see what I can do. Who knows, that extra 3mm might be just enough! Post Extras:       PJ Anway Carpal Tunnel Reged: 06/04/03 Loc: North Coast Re: Porrima has gotten EASY [Re: PJ Anway]       #5230380 - 05/19/12 11:53 PM Edit   Reply   Quote Quick Reply   Had a chance to go out for a little while this evening with the 63mm refractor. My main target was Porrima (gamma Virginis), but I also was able to view Izar (epsilon Bootis), Algieba (gamma Leonis), & Saturn. The evening was humid and hazy which dimmed everything a bit, but made for pretty steady seeing. After viewing Saturn for a while as evening set in, I decided the seeing was steady enough to try and tackle Porrima with the 63. As a warm up for Porrima, I started with Algieba in Leo. At 140X (6mm ortho) two nice golden orbs with sharp disks; it appeared that the seeing was improving a bit. Next on to Izar in Bootes. Nicely split at 168X (5mm ortho) with a golden primary and pale blue secondary sitting on the first diffraction ring. A lovely pair that definitely gives the appearance of a planet orbiting a star. Last up - Porrima. At 84X (10mm ortho) not a hint of duplicity; at 168X (5mm ortho) a peanut shape and at times a notched figure eight and then at 210X (4mm ortho) a definite split with a thin line of separation It’s amazing how quickly the orbit has brought this star in the range of a small scope again. In my 1909 (103 yrs ago) copy of Olcott’s “In Starland with a Three-Inch Telescope” Porrima is listed with a separation of 5.8 arcseconds, which made a good target for a three-inch scope. It won’t get to that separation again in my lifetime, but it certainly is widening! Post Extras:       desertstars Reged: 11/05/03 Loc: Tucson, AZ Re: Porrima has gotten EASY [Re: Tom and Beth]       #5230709 - 05/20/12 10:15 AM Edit   Reply   Quote Quick Reply   Quote: OK, who did the Vulcan Mind Meld that has at least 3 Zonies trying this split with 60MM? What? You didn't get the memo? 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