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cavefrog
sage
Reged: 11/11/08
Posts: 449
Loc: loozyanna
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allright! I just had to come here and spout off! I just saw my first transition of a moon. it is still going on matter of fact. may not be a big deal to some , but after 3 years, the timing was finally right. Io was throwing a shadow on jupiter when I first looked tonight. after about 20 minutes
Io itself became apparent on the west side.(on the left through the scope)  
totally awesome dudes! (and dudettes!)
Theo
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I am only an egg
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starrancher
professor emeritus
Reged: 06/09/09
Posts: 574
Loc: Northern Arizona
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Fun stuff eh Theo ?! ...I've spent many a 4 or 5 hour session on Jupiter . Red Spot transits too . Seeing hasn't been as good for me in general on Jupiter lately . Some of the best detail for me was back in 2007 if you can believe that . It was lower in the southern sky back then so go figure .
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LXD75 AR5
LXD75 SN8
Series 4000 Plossls
Misc. other stuff
Fort Rock , Az .
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cavefrog
sage
Reged: 11/11/08
Posts: 449
Loc: loozyanna
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yup! neat stuff. I still got yet to see the GRS! 
Theo
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I am only an egg
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Kutno
member
Reged: 08/17/09
Posts: 52
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Congratulations Theo,
It always amazes me how crisp, clean, and black the shadow dots appear on Jupiter.
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Rick Woods
Postmaster
Reged: 01/27/05
Posts: 5648
Loc: Inner Solar System
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Quote:
yup! neat stuff. I still got yet to see the GRS!
Theo
Well it's not that G and isn't really very R anymore, but it's definitely an S.
Easy to miss if the seeing isn't good.
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- Rick
14" LX200GPS
83% of all statistics are meaningless.
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starrancher
professor emeritus
Reged: 06/09/09
Posts: 574
Loc: Northern Arizona
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I've seen some really great Red Spot transits , although I admit the seeing was great on those nights . This pretty much goes without saying , but even when the seeing is good I find that the best magnification for retaining hard line detail on Jupiter is at about 125x . I see a desire in a lot of observers to try to push magnification beyond the optimum limits & hard line detail is just going to be lost by doing so . With the oculars & Barlows that I have , I can achieve 122x in my AR5 & 123x in my SN8 . For the most part , the refractor does a better job for fine planetary detail , but if Jupiter is nice & high in the sky the 8 inch reflector does a surprisingly nice job considering the fast focal ratio & fairly large central obstruction . This design is truly effected more by trying to view through more atmosphere as when the planet is low in the sky or when seeing isn't all that great compared to the 5 inch refractor . I would have to say that the combination of the larger aperture as well as the faster focal ratio & central obstruction of the SN8 in combination is what will take its' toll on fine planetary detail while viewing at less than optimum areas or sky conditions . All that aside , it is really a rare night when pushing the magnification beyond the 125x range on Jupiter has been beneficial in my experiences . Hard line detail in a smaller apparent disc will provide a better view than trying to push for a larger apparent size & suffering the loss of hard line crispness .
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LXD75 AR5
LXD75 SN8
Series 4000 Plossls
Misc. other stuff
Fort Rock , Az .
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cavefrog
sage
Reged: 11/11/08
Posts: 449
Loc: loozyanna
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Quote:
Congratulations Theo,
It always amazes me how crisp, clean, and black the shadow dots appear on Jupiter.
yeah, I have seen pictures of them before, so I knew immediately what I was looking at. I just couldn't figure out where the moon itself was. when it started to move off the disc of jupiter, well of course then I knew where it was. I am going to award this success to my new 6mm
radian. of which I used in a celestron 100ed.
Theo
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I am only an egg
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Kutno
member
Reged: 08/17/09
Posts: 52
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Theo,
Having the extremely sharp, bright, and comfortable 6mm Radian, in your star diagonal, will definitely enhance your viewing pleasure. Though I have never had the pleasure of looking through a Celestron 100ED, it sounds as if you have a very good platform from which to view the planets.
Onward to Cassini and Encke!
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