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Pages: 1 | 2 | 3 | (show all) azure1961p Postmaster Reged: 01/17/09 Loc: USA Re: jupiter GRS [Re: Rick Woods]       #5414671 - 09/11/12 07:03 AM Edit   Reply   Quote Quick Reply   LOL, I HAVE an 8" reflector but you are making me nostagic for the 826. Pete Post Extras:       Rick Woods Postmaster Reged: 01/27/05 Loc: Inner Solar System Re: jupiter GRS [Re: azure1961p]       #5415635 - 09/11/12 04:16 PM Edit   Reply   Quote Quick Reply   All part of my evil plan! Post Extras:       E_Look Post Laureate Reged: 03/06/08 Loc: near New York Re: jupiter GRS [Re: Rick Woods]       #5415925 - 09/11/12 06:55 PM Edit   Reply   Quote Quick Reply   Then you must be behind the Eyepiece Forum, Rick! Post Extras:       starrancher Carpal Tunnel Reged: 06/09/09 Loc: Northern Arizona Re: jupiter GRS [Re: E_Look]       #5416001 - 09/11/12 07:40 PM Edit   Reply   Quote Quick Reply   OK then ! How much ? Post Extras:       Rick Woods Postmaster Reged: 01/27/05 Loc: Inner Solar System Re: jupiter GRS [Re: starrancher]       #5416143 - 09/11/12 09:07 PM Edit   Reply   Quote Quick Reply   What? For mine? From my cold dead eyeball! Post Extras:       azure1961p Postmaster Reged: 01/17/09 Loc: USA Re: jupiter GRS [Re: Rick Woods]       #5416217 - 09/11/12 09:34 PM Edit   Reply   Quote Quick Reply   Quote: What? For mine? From my cold dead eyeball! Lol, nice one. Pete Post Extras:       ericj professor emeritus Reged: 02/17/05 Re: jupiter GRS [Re: azure1961p]       #5423775 - 09/16/12 01:27 PM Edit   Reply   Quote Quick Reply   Hi Pete, Thanks, and nice to hear your experiences with the Edmund 4/1-4" f/10 reflector. It cost me $60.00 when I bought it used in 1974. I do recall taking the 3x barlow out in order to change magnification as the scope only came with one eyepiece. The scope provided me with some nice views of the planets, Moon, and deep-sky objects, and it whetted my appetite for a larger reflector. So in 1975 sold the Edmund and bought a Criterion RV-6 reflector that I purchased for $263.95. It had great optics and is still considered a classic. Sometimes I wish I had kept it... Best, Eric Jamison http://ejamison.net/ Post Extras:       azure1961p Postmaster Reged: 01/17/09 Loc: USA Re: jupiter GRS [Re: ericj]       #5424447 - 09/16/12 09:38 PM Edit   Reply   Quote Quick Reply   Eric, LOL, I remember showing Dad the RV6 reflector in a full page ad in Sky and Tel and it lost support on two counts - the extra hundred bux or so and the comparitively beastly weight of it. He sure came through on the alternative though! Blast from the past. Good times and a great Dad. Pete Post Extras:       Sarkikos Postmaster Reged: 12/18/07 Loc: Suburban Maryland, USA Re: jupiter GRS [Re: ericj]       #5426909 - 09/18/12 08:54 AM Edit   Reply   Quote Quick Reply   Eric, Quote: On September 15, 1974, I was able to eaily see the GRS using an Edmund 4/1-4" f/10 reflector at 135x as shown in this sketch: http://ejamison.net/drawing.html I had the same model telescope back in the early '70's. That little scope could really give good images of the planets. I'm sure, though, that my 10" Dob shows me much more surface detail. The GRS was a much deeper red at that time. Mike Post Extras:       ericj professor emeritus Reged: 02/17/05 Re: jupiter GRS [Re: azure1961p]       #5438178 - 09/24/12 02:11 PM Edit   Reply   Quote Quick Reply   Hi Pete, Our discussion on the Edmund 4.25" reflector prompted me to go back and look through some of my old Astronomy magazines for the Edmund ad for the scope. I came across one from 1975, scanned it in and added it to my web page on my Choosing A Telescope article: http://ejamison.net/telescope_advice.html It reminded me of an Orion Nebula observation and sketch were made back on November 9th-10th 1974 using the Edmund with a magnification of 45x. The sketch was the second deep-sky sketch that I ever made. In my observing notes I recorded: "A beautiful glowing object." Although the nebula appeared green in color I used yellow to represent it in the sketch. I have seen more detail in the nebula since then, but sometimes it can be fun to look back at old observations: http://ejamison.net/orion_neb.html Best, Eric Jamison http://ejamison.net/ Post Extras:       ericj professor emeritus Reged: 02/17/05 Re: jupiter GRS [Re: Sarkikos]       #5438199 - 09/24/12 02:24 PM Edit   Reply   Quote Quick Reply   Hi Mike, Yes they were good scopes, and your right the GRS was a much deeper red at that time. What scopes do you use these days? Clear Skies, Eric http://ejamison.net/ Post Extras:       Sarkikos Postmaster Reged: 12/18/07 Loc: Suburban Maryland, USA Re: jupiter GRS [Re: ericj]       #5438206 - 09/24/12 02:28 PM Edit   Reply   Quote Quick Reply   I have nice memories of the Edmund reflector. But I try not to drown in a deluge of nostalgia. What keeps me from searching for and buying one of those old scopes is the stalk diagonal. Forgetaboutit. Now I know too much about the importance of close collimation to put up with one of those. I hate to admit that the first and only scope I ever built - a 6" f/8 Newt - also had a diagonal on a stalk. Mike Post Extras:       Sarkikos Postmaster Reged: 12/18/07 Loc: Suburban Maryland, USA Re: jupiter GRS [Re: ericj]       #5438218 - 09/24/12 02:38 PM Edit   Reply   Quote Quick Reply   Eric, Quote: What scopes do you use these days? My scopes are listed in the sig. The one I use the most for my trips to a dark sky site is the 10" f/4.8 Dob. (Nearly 900 DSO so far with that scope - not including double stars and without using DSCs.) Sometimes I take a 5" f/5 Dob instead, if I want to leave more room for the family. For grab-n-go one-trip observation sessions here at home I take out my 90mm Mak, mostly for the Moon. For planets or lunar at home, I might also use an 8" f/6 Dob or a 6" Mak. If I feel up to it - and want a detailed sketch of Jupiter or Mars, or want to see a difficult lunar feature - I'll take out the 10" Dob at home. The 6" Mak sees the least sky time because of the long cool-down required. What scopes are you using now? Mike Post Extras:       azure1961p Postmaster Reged: 01/17/09 Loc: USA Re: jupiter GRS [Re: Sarkikos]       #5438940 - 09/24/12 11:02 PM Edit   Reply   Quote Quick Reply   Quote: I have nice memories of the Edmund reflector. But I try not to drown in a deluge of nostalgia. What keeps me from searching for and buying one of those old scopes is the stalk diagonal. Forgetaboutit. Now I know too much about the importance of close collimation to put up with one of those. I hate to admit that the first and only scope I ever built - a 6" f/8 Newt - also had a diagonal on a stalk. Mike LOL, no way I can drown. While I loved it at the time , the images were actually AWFUL. The stalk was the least of the problems next top the gross spherical aberration and therma boiling. Still it was my entry into a universe that still unfolding and it did keep a kid quite happy. I know too much now to drown! Eric, thanks for the ad pic. I recall sketching the same object myself tho in black and white. Lord only knows where all my old logs went. Pete Post Extras:       PJ Anway Carpal Tunnel Reged: 06/04/03 Loc: North Coast Re: jupiter GRS [Re: vvv]       #5439309 - 09/25/12 08:46 AM Edit   Reply   Quote Quick Reply   Returning to the original topic. I have seen the GRS in both my 75mm and 63mm scopes. However, nowadays I would call it the GPS (Great Pink Spot) if that weren't already taken . Post Extras:       Sarkikos Postmaster Reged: 12/18/07 Loc: Suburban Maryland, USA Re: jupiter GRS [Re: PJ Anway]       #5439324 - 09/25/12 08:53 AM Edit   Reply   Quote Quick Reply   Yes, I've seen the GRS through my A70LF, a 70mm f/12.9 achromat. Mike Post Extras:       Doc Willie Pooh-Bah Reged: 03/31/10 Loc: Mid-Hudson Valley, NY, USA Re: jupiter GRS [Re: Sarkikos]       #5440741 - 09/25/12 10:18 PM Edit   Reply   Quote Quick Reply   I was out last night viewing Jupiter, and I saw a large white oval on the larger band. Not the GRS? What was it then? Here's my sketch ( the small white dots below the oval are artifacts). Post Extras:       PJ Anway Carpal Tunnel Reged: 06/04/03 Loc: North Coast Re: jupiter GRS [Re: Doc Willie]       #5441159 - 09/26/12 07:51 AM Edit   Reply   Quote Quick Reply   That's the GRS. Transit time (center of planet) for the 25th was 4:56am EDT. Very nice sketch! Post Extras:       Sarkikos Postmaster Reged: 12/18/07 Loc: Suburban Maryland, USA Re: jupiter GRS [Re: Doc Willie]       #5441174 - 09/26/12 08:07 AM Edit   Reply   Quote Quick Reply   Willie, Here is a thread from the Solar System Imaging & Processing forum which contains a photo of Jupiter taken on 9/25/12. It shows the GRS. Jupiter/GRS - 25 September in Excellent Conditions Mike Post Extras:       Doc Willie Pooh-Bah Reged: 03/31/10 Loc: Mid-Hudson Valley, NY, USA Re: jupiter GRS [Re: Sarkikos]       #5441334 - 09/26/12 09:59 AM Edit   Reply   Quote Quick Reply   I am a bit surprised at how white it appeared - the same color as the zone above it, except for its very thin boundary. Post Extras:       Pages: 1 | 2 | 3 | (show all)

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