August 2010 - Utah-Astronomy - mailman.xmission.com

RE Lines in photo.
by Stephen Peterson 25 Aug '10

25 Aug '10

My guess is that the propeller blade is alternately blocking light as the CCD was scanning. Interesting.

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Vertical stripes in picture
by Raeburn Kennard 25 Aug '10

25 Aug '10

Patrick, The vertical stripes look like difraction spikes caused by the passage of the propellor in front of the light source. I don't understand this phenomenon, but others of our members certainly must. I only became aware of it recently when I was googling "hartzman masks" (mentioned on this site recently), which led me to "Bahtinov mask" and then to "diffraction spike," etc. Responding to Patrick: And while I've got your attention, anyone able to explain the vertical stripes in this image which my copilot got with her cell phone's camera? I'm guessing the stripes are somehow being caused by the propeller but I can't figure how: http://users.wirelessbeehive.com/~paw/temp/2010AUG24/2010AUG24-07.JPG Carpe Noctem, patrick Raeburn G. Kennard Kirton & McConkie 60 East South Temple, Suite 1800 Salt Lake City, UT 84111 (801) 321-4867 direct telephone (801) 328-3600 main switchboard (801) 550-6143 cell (801) 212-2075 fax rkennard(a)kmclaw.com

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Another explanation for the pyramids
by Patrick Wiggins 23 Aug '10

23 Aug '10

http://www.arcamax.com/bc/s-766241-520647 :)

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Mirror Lake, Snowbird
by Craig Smith 23 Aug '10

23 Aug '10

I noticed at Mirror Lake this weekend that they have star parties occasionally, and also that Snowbird has a Summer Stargazers event where you take the tram up to the top where they have telescopes set up. Has anyone attended or participated in either of these? Craig

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Re: [Utah-astronomy] Astrophoto failure
by Debbie 23 Aug '10

23 Aug '10

Joe, I had trouble with my Telrad finder last Tuesday night. I could not even find Arcturus with it. Finally Jim found Arcturus, I kept the scope centered while Jim fiddled with the screws to put the bullseye on Arcturus. The night would of been a total waste if I hadn't had help. Yesterday, I got a new Telrad finder so I can use my scope without anymore grief. I told Jim I'd rather get a new one than put up with the frustration of not being able to point my scope. It seems like there are less problems with visual observing than astrophotography. I'm very careful with my equipment because I have ruined my NGC-Max cord twice. In the future, I'd like to try some piggy-back astrophotography at Kolob Canyons. Debbie On Mon Aug 16 15:15 , Joe Bauman <josephmbauman(a)yahoo.com> sent: >Thanks, Daniel -- Wish I had thought of that earlier! But now I've had the practice. Best wishes, Joe > >--- On Mon, 8/16/10, Daniel Holmes danielh(a)holmesonics.com> wrote: > >From: Daniel Holmes danielh(a)holmesonics.com> >Subject: Re: [Utah-astronomy] Astrophoto failure >To: "Utah Astronomy" utah-astronomy(a)mailman.xmission.com> >Date: Monday, August 16, 2010, 10:51 AM > >Joe, when I'm trying out a new technique, I do it in the daylight so I can see things, and practice it until I can literally do it in the dark--is there a mountain or something that is far away that you can see from your driveway? > >Dan > >On Aug 16, 2010, at 10:47 AM, Rob Ratkowski Photography wrote: > >> Joe >> >> keep the faith! sounds like equipment more than technique that's bugging you, just work thru it >> >> >> Aloha >> Rob >> >> _______________________________________________ >> Utah-Astronomy mailing list >> Utah-Astronomy(a)mailman.xmission.com >> http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy >> Visit the Photo Gallery: http://www.slas.us/gallery2/main.php >> Visit the Wiki: http://www.utahastronomy.com > >-- >Daniel Holmes, danielh(a)holmesonics.com >"Laugh while you can, monkey boy!" -- Lord John Whorfin > > > > >_______________________________________________ >Utah-Astronomy mailing list >Utah-Astronomy(a)mailman.xmission.com >http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy >Visit the Photo Gallery: http://www.slas.us/gallery2/main.php >Visit the Wiki: http://www.utahastronomy.com > > > > >_______________________________________________ >Utah-Astronomy mailing list >Utah-Astronomy(a)mailman.xmission.com >http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy >Visit the Photo Gallery: http://www.slas.us/gallery2/main.php >Visit the Wiki: http://www.utahastronomy.com

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Lakeside on Saturday?
by Troy Davidson 22 Aug '10

22 Aug '10

If the skies stay clear on Saturday, I'm going to head out to Lakeside around 6-7pm. Didn't know if anyone else wanted to meet out there and do some observing. ++++++++++++++++++ Troy Davidson www.istroyworking.com

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Another Jovian impact
by Patrick Wiggins 22 Aug '10

22 Aug '10

The Minor Planet Mailing List is reporting a guy in Japan has imaged another impact on Jupiter. I'm beginning to think that these events may not be all that rare after all, just that more folks are spending more time imaging Jupiter. http://libra-co.com/Jupiter2010Aug20182212UT.wmv patrick

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Re: [Utah-astronomy] New Mount or New Telescope?
by Daniel Holmes 22 Aug '10

22 Aug '10

My 8" newt is on a skyview pro by Orion...probably right at the edge for that mount, but there are many out there that can handle that class of scope. Boils down to what features/how much you are willing to spend, I think. Dan -- Sent from my Incredible. Pardon any mispelings or errors. ----- Reply message ----- From: "Troy Davidson" <clandaith(a)gmail.com> Date: Sun, Aug 22, 2010 3:03 pm Subject: [Utah-astronomy] New Mount or New Telescope? To: "Utah Astronomy" <Utah-Astronomy(a)mailman.xmission.com> Ok, I've had my 8" dobsonian for a few years now. I like the scope and it functions just fine for me. But, I want an equatorial mount. I know there are platforms you can put under the dobsonian to give it tracking capabilities, but that's not what I want. So, is there a type of mount out there that I can attach my dobsonian tube to, or should I get a new telescope? ++++++++++++++++++ Troy Davidson www.istroyworking.com _______________________________________________ Utah-Astronomy mailing list Utah-Astronomy(a)mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Visit the Photo Gallery: http://www.slas.us/gallery2/main.php Visit the Wiki: http://www.utahastronomy.com

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Re: [Utah-astronomy] Perseids (and a question)
by sjseebergp＠webtv.net 22 Aug '10

22 Aug '10

Years ago when we lived in So. California lecturers at Griffith Observatory called any trail that remained visible after a meteor's passing, a persistent train. All aforementioned descriptions are valid. Stan and Jan, Vancouver, WA

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New Mount or New Telescope?
by Troy Davidson 22 Aug '10

22 Aug '10

Ok, I've had my 8" dobsonian for a few years now. I like the scope and it functions just fine for me. But, I want an equatorial mount. I know there are platforms you can put under the dobsonian to give it tracking capabilities, but that's not what I want. So, is there a type of mount out there that I can attach my dobsonian tube to, or should I get a new telescope? ++++++++++++++++++ Troy Davidson www.istroyworking.com

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