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Everything posted by Laurieast
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Is my mount on the right way around???
Laurieast replied to dazzystar's topic in Discussions - Scopes / Whole setups
Also correct, and 0 when the tube is horizontal. -
From Twitter: Dr Heidi B. Hammel@hbhammel·20hThis diagram of NIRCam optics is complicated, but the take-away is that when the "Pupil Imaging Lens" is in the beam, we see the *mirror* in focus, rather than the *sky* in focus. This mode is used for only alignment and engineering, not for science.
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Is my mount on the right way around???
Laurieast replied to dazzystar's topic in Discussions - Scopes / Whole setups
Looks fine to me, apart from the lack of a counterweight. -
224?
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NASA to Discuss Webb Telescope Progress, Mirror Alignment: https://www.nasa.gov/press-release/nasa-to-discuss-webb-telescope-progress-mirror-alignment
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Webb Is Chilling Out: https://blogs.nasa.gov/webb/2022/02/10/webb-is-chilling-out/
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Many thanks to FLO for the rapid dispatch of: Astro Essentials M48 to M42 / T2 adapter Astro Essentials 2-inch Compression-Ring adapter for Sky-Watcher Newtonians Astro Essentials UV/IR Cut Filter 2" More clouds....
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Can you recommend a good UV/IR cut filter for planetary?
Laurieast replied to StuartT's topic in Getting Started With Imaging
Or the Astro Essentials UV/IR Cut Filter 1.25": £19 ,2": £39 from FLO -
Finderscope Crosshair Orientation
Laurieast replied to ch00se's topic in Getting Started Equipment Help and Advice
I don't know if they are the same, but on the TS Optics RACI finder version (Which was also at about 45º to the tube), the eyepiece can be unscrewed and the support ring moved. Is yours like this? I know you said above that you unscrewed it, but I'm wondering which bit you unscrewed , or maybe the SW version is different. -
Photons Incoming: Webb Team Begins Aligning the Telescope. https://blogs.nasa.gov/webb/2022/02/03/photons-incoming-webb-team-begins-aligning-the-telescope/
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Looks great! I did that on my ST 80 😀
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Any interesting projects with an ETX125?
Laurieast replied to vineyard's topic in Discussions - Scopes / Whole setups
Why? -
Following Webb’s Arrival at L2, Telescope Commissioning Set to Begin. https://blogs.nasa.gov/webb/2022/01/31/following-webbs-arrival-at-l2-telescope-commissioning-set-to-begin/
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Starnet++ v2
Laurieast replied to The Lazy Astronomer's topic in Imaging - Image Processing, Help and Techniques
Thanks, it will be interesting to to compare it to StarXTerminator -
Polar star height and observing site altitude
Laurieast replied to cesco's topic in Getting Started With Observing
What mount is this? Those scales are usually only very approximate. -
Stargazing at Stonehenge
Laurieast replied to Lee_P's topic in Imaging - Widefield, Special Events and Comets
^ https://www.londontoolkit.com/whattodo/stonehenge_what_to_expect.htm -
Stargazing at Stonehenge
Laurieast replied to Lee_P's topic in Imaging - Widefield, Special Events and Comets
How close to the stones will I get? How close to the stones you can get during normal opening hours at Stonehenge During normal opening hours you cannot walk up to the stones themselves. The nearest you will get to the stones is about 10 yards, the monument being roped off by a low barrier, (see picture below). However it is possible to walk up to and among the stones at Stonehenge outside public opening hours. These are called Special Access visits. During these sessions of one hour duration, only 26 people are allowed onto Stonehenge, going beyond the barriers and walking amongst the stones. The fact that these Stonehenge Special Access visits are outside public opening hours mean that they are at dawn or evening. Given that Stonehenge is two hours' drive from London this obviously provides logistical issues in getting there. The Special Access Visits are also immensely popular, demand far outstrips supply and they are often sold out months in advance. We have dedicated pages for people independently wanting to partake in a Stonehenge Special Access Visit and also a page on scheduled Stonehenge Special Access Tours from London. -
NASA TV NASA to Discuss Webb’s Arrival at Final Destination, Next Steps Scientists and engineers operating NASA’s James Webb Space Telescope will answer questions about the mission’s latest milestones in a NASA Science Live broadcast at 3 p.m. EST Monday, Jan. 24, followed by a media teleconference at 4 p.m. https://www.nasa.gov/press-release/nasa-to-discuss-webb-s-arrival-at-final-destination-next-steps
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I found this on YouTube by Nerdy Beardo Astrophotography Easy Star Reduction in Adobe Photoshop There is a StarXterminator Action Set here, at the bottom of the page. https://www.nerdybeardo.com/star-reduction-in-adobe-photoshop/?fbclid=IwAR1-euKwzvOZNWr76Z4ZsZKvuuGLIqPnJkoBj9OsleOTv16JccdKSAHbMTk Note: If running a trial version of StarXterminator , open an image first, run StarXterminator once, Revert the image, then run the action set, now you have control over the opacity of the levels. Also, Interesting results with an image that has been enhanced in Topaz Gigapixel.
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Newtonian secondary size calculation
Laurieast replied to Mr Spock's topic in Discussions - Scopes / Whole setups
This help? https://stellafane.org/tm/dob/ota/design.html https://stellafane.org/tm/newt-web/newt-web.html I once designed a telescope with a DOS version of Newt 21 ( A while ago 😉 ) -