Recent Posts

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TAC Visual / Pinnacles NP Road Closure
« Last post by Dave Ittner on Today at 11:10:22 AM »
Hi folks,

Just a heads up that the road leading in and out of Pinnacles National Park - West Side will be completely closed between the hours of 9 pm to 6 am during the entire month of June.  No idea as to why.

Also, there is a huge construction sign near the visitor's center that is flashing this warning notice in the direction of the parking lot.  It's bright and very irritating.

That means anyone in the park at night will be stuck there till the road reopens in the morning.

Dave

(sorry, originally stated Yosemite ... had mush for brains this morning)
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TAC Imaging / Animated GIF of Io - Europa transit of Jupiter
« Last post by oldfrankland on Yesterday at 03:35:36 PM »


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TAC Imaging / Europa and Io transit, 25 May
« Last post by oldfrankland on Yesterday at 11:48:57 AM »
Followed the transit of Europa and Io early evening, 25 May.  Seeing was only fair, but with moments of smoother air.  I watched the transit while imaging it figuring I would get a few usable AVIs.  Results were most surprising. Reduced image scale and the magic of AutoStakkert produced a fascinating series of images documenting the transit.  Unfortunately, clouds moved in before Io's shadow reached Jupiter's western limb.  Rewarding all the same.  3000 frame AVIs processed with AutoStakkert and RegiStax wavelets.  Planetary imaging rocks!



http://lafterhall.com/jup-io-eur_transit_w25a-red_jferreira_25may2017_001.png
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TAC Imaging / Jupiter occulting Ganymede, small animation
« Last post by oldfrankland on May 24, 2017, 01:19:38 PM »
Here's a small animation of Jupiter occulting Ganymede.  Seeing was only fair last night, thus the smaller image scale.  Surprisingly, some structure is visible on Ganymede, even at this image scale.  Planetary imaging rocks!




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TAC Imaging / Re: Jupiter stereo pair
« Last post by oldfrankland on May 24, 2017, 09:30:50 AM »
Way Cool bringing the two images together with my eyes.  What telescope setup did you use for these images?

Thanks.  These are shot with a C925 with 3x Barlow, on a G11 mount.  I have the system setup with a powered Moonlite focuser.


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TAC Imaging / Re: Jupiter stereo pair
« Last post by pnatscher on May 24, 2017, 06:48:51 AM »
Way Cool bringing the two images together with my eyes.  What telescope setup did you use for these images?
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TAC Imaging / Jupiter stereo pair
« Last post by oldfrankland on May 23, 2017, 06:33:02 PM »
Shots of Jupiter from Sunday night, 21 May.  High clouds interfered with most of the AVIs, but a few worked up very nicely.  Two, recorded 8 minutes apart create an excellent 'cross-eyed' stereo pair.  Despite relative low altitude and suburban seeing conditions, Jupiter has been fascinating.



http://www.lafterhall.com/jupiter_stereo_25a-red_jferreira_21may2017_001.png

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TAC Visual / Jupiter Double Shadow Transit, May 25, 2017
« Last post by pnatscher on May 23, 2017, 06:25:21 PM »
There will be another Jupiter double shadow transit from Europa and Io between 10:50pm and 12:10AM, with Europa leading.
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TAC Imaging / Re: Lunar imaging question
« Last post by oldfrankland on May 23, 2017, 06:18:54 PM »
Hi All,

I picked up an ASI130MM camera recently to use for the eclipse in August.  I figured I might as well practice on the moon also.  My question regards exposure time vs. gain and how to avoid washing out the brightest features.  I got this shot that turned out ok, but Copernicus and Aristarchus are over exposed and the other images I have during the same session that aren't just don't have the same detail (I know it could be seeing). 

I'm using a C8 (note to self, get a Crayford focuser), AutoStakkert for Stacking, and Registax 6 for wavelet processing.

Any suggestions are very welcome.

Cheers,

Dave

Dave, I'm using a ZWO 120MM and Imaging Source DMK21 and DMK41 monochrome cameras.  I typically keep gain to a minimum, increase contrast a little with camera gamma, the rest is adjusting shutter speed using histogram and judging live view on the monitor.  There really are no 'silver bullet' exposure combinations.  As in all areas of astrophotography, the more you do, the more you refine and improve your imaging techniques.

This image is shot with the ZWO 120MM with zero gain.  The other side of the coin, as you no doubt noticed, is the post processing.  You look to be off to a really good start, but I might point out that capturing the solar corona during the eclipse may require a different approach.  Shoot lots and learn all you can about your camera and scope combination.



http://www.lafterhall.com/maurolycus_moretus_18dayold_jferreira_001.png
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Observing Intents / Pinnacles for supernova hunting
« Last post by DDK on May 23, 2017, 04:49:19 PM »
Will be at that open lot well by sunset. Just spent a pleasant week in Philly and DC, would yes like to see any stars.
This is tomorrow, Wednesday the 24th.
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