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Re: April Meeting Minutes

 

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Awesome!?

Thanks.?

Deb Fennell

On Apr 29, 2025, at 9:52?AM, Gerry via groups.io <gvkopcsay@...> wrote:

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Mark,
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Got it. See you this afternoon.
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Gerry
Re: April Meeting Minutes

 

Mark,
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Got it. See you this afternoon.
?
Gerry
Re: April Meeting Minutes

 

Unfortunately, I¡¯m away so I can¡¯t help at the school. I really enjoyed doing it last year.?

Amy
On Apr 28, 2025 at 10:41?PM -0400, Mark Strollo via groups.io <mark@...>, wrote:

Thanks, Gerry,
We meet there about 4:15. ? Deb sent you some info.
Mark
Re: Cell phone astrophotography - beginners attempt

 

Really enjoyed that, thanks for posting. The moving star trails portion was mesmerizing and I watched the points of stars section over and over picking out the constellations. Way to go! Jay
Re: For Those Who Want Free SW for Image Processing

 

Geoff, glad you have discovered Siril. I'm using it for SeeStar lights only images and it works well. It does require that you have only lights in a folder called "lights" but it doesn't require bias frames.?
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There's even a script called OSC_Preprocessing_WithoutDBF.?
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Hope that helps,
Jay
Re: April Meeting Minutes

 

Thanks, Gerry,
We meet there about 4:15. ? Deb sent you some info.
Mark
Re: For Those Who Want Free SW for Image Processing

 

For those. using or considering Siril, the new version 1.4.0 is available in beta.
It includes drizzle, mosaics, and a few other features.
Mark
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Re: April Meeting Minutes

 

Mark & Deb,
I was not sure that I could make the Catherine Kolnaski event tomorrow, 4/29, but I will available. If you still need it I can bring my solar scope. What time should I be there to set up and where (in past events I recall setting up behind the school)??
?
Gerry
Re: Cell phone astrophotography - beginners attempt

 

Very cool. Thanks for sharing, Jeff. Have more fun tonight - we are going to have clear skies!!!

LB


On Mon, Apr 28, 2025 at 10:04?AM Jeffrey Dunn via <jeffreyj.dunn=[email protected]> wrote:
Thanks all,
Mark - I did notice that as well!? I am eager to try this out at one of our observing sites.
All - the best benefit of this is my cell phone stays outside and limits mindless scrolling in the evening :)?
--
Jeff Dunn
Fw: April Skyscrapers of Rhode Island Presentation online

 

From: "Secretary ASGH via groups.io" <asgh@...>
Cc:
Sent: Mon, Apr 28, 2025 at 12:23 PM
Subject: [asgh] April Skyscrapers of Rhode Island Presentation online

The April 5 Meeting of the Skyscrapers is now available online on their YouTube Channel 
"Sensing Our Universe: Using Data to Go Beyond Sight"
by Dr. Kimberly Arcand, Chandra X-Ray Observatory

John Sillasen?
Re: Cell phone astrophotography - beginners attempt

 

Thanks all,
Mark - I did notice that as well!? I am eager to try this out at one of our observing sites.
All - the best benefit of this is my cell phone stays outside and limits mindless scrolling in the evening :)?
--
Jeff Dunn
https://shorelineastronomicalsociety.blogspot.com/
Re: Cell phone astrophotography - beginners attempt

 

Nicely done, Jeff.

George
Re: Cell phone astrophotography - beginners attempt

 

Cool.?
Looks like a small meteor early in the sequence at the 3 O¡¯clock position.?
Mark

On Mon, Apr 28, 2025 at 9:32 AM, Jeffrey Dunn via groups.io <jeffreyj.dunn@...> wrote:
Thank you!
--
Jeff Dunn
https://shorelineastronomicalsociety.blogspot.com/

Re: Cell phone astrophotography - beginners attempt

 

Thank you!
--
Jeff Dunn
https://shorelineastronomicalsociety.blogspot.com/
Re: Cell phone astrophotography - beginners attempt

 

Excellent!?
--
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Alan Sheiness
Trail 53 Observatory, Lyme CT
Cell phone astrophotography - beginners attempt

 

I posted by my work to Instagram?
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iPhone 12
Lumilapse Bluetooth shutter control?
Native camera app set to Max night mode?
30 second intervals stacked and rendered using Star Tracker app.
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Time sequence is about 9 PM to 6:30 AM ?April 27-28.
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next step is seeing if I can bulk apply contrast and brightness settings to the video or the ~900+ images before beginning the process.
--
Jeff Dunn
https://shorelineastronomicalsociety.blogspot.com/
Re: Messier ¡­. Uhh Walk?

 

I¡¯m heading to Salt Meadow Park in Madison tonight to help someone understand their telescope. Looks clear but breezy so not sure how long I¡¯ll make it.
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--
Jeff Dunn
https://shorelineastronomicalsociety.blogspot.com/
Re: Messier ¡­. hh Walk?

 

Out of town for a bit. Hope you can get it done.?

Amy?
On Apr 27, 2025 at 12:56?PM -0400, Mark Strollo via groups.io <mark@...>, wrote:

Well we tried, but the CT weather didn¡¯t cooperate.?
Tonight¡¯s CSC for Propbusters shows some improvement in cloud cover after dark, but would probably not support a Messier Marathon. ?I¡¯m planning on going to Alan¡¯s Trail 53 session if you want to try and observe tonight. Arriving 7:30-8:00. ?TAAS members welcome.?
Monday night¡¯s forecast looks better. ?Anybody else want to try then, too?
Mark
Messier ¡­. Uhh Walk?

 

Well we tried, but the CT weather didn¡¯t cooperate.?
Tonight¡¯s CSC for Propbusters shows some improvement in cloud cover after dark, but would probably not support a Messier Marathon. ?I¡¯m planning on going to Alan¡¯s Trail 53 session if you want to try and observe tonight. Arriving 7:30-8:00. ?TAAS members welcome.?
Monday night¡¯s forecast looks better. ?Anybody else want to try then, too?
Mark
Re: For Those Who Want Free SW for Image Processing

 

¿ªÔÆÌåÓý

I *just* started using SIRIL.? I use Deep Sky Stacker (free also) for pre-processing images.? Last week I dedicated our one clear night to imaging the M-63 galaxy.? When I went to use DSS I discovered that over half the images were unviewable/random color! noise.? I tried using the the GIMP (free photoshop kinda like) and it showed the images being ok... but I wasn't positive as older versions of GIMP show FITS files in three color bands RGB and the latest one showed just one image.? So I went looking for a Fits viewer and stumbled on SIRIL.? As with most software, it has a bit of a learning curve, but I've been able to process my first 90 images and the results are great.? Next up I will do all the images.? Now, mind, I don't know why DSS shows corrupted files while SIRIL doesn't, I'm just saying that perhaps I've discovered a bug in DSS.? DSS is so easy to use whilst SIRIL takes some learning, and SIRIL REQUIRES biases, darks,flats, and lights - DSS does not.

Oh, and on a similar topic... if you have a ZWO ASI294MM Pro cooled camera (this applies to others like the B&W models) be aware that images less than 3 seconds are basically useless.? HUGE amount of noise.? I've noticed that I cannot use biases in preprocessing because I end up with unusable processed images.? I just learned this about the 294.? So - to remedy it, it is recommended to use 3 sec dark flats instead of biases.? I tried folding my white t-shirt in half (4 layers) and even in relatively dim light I could only achieve 1 sec images with the correct histogram.? So I'm making an LED "light" box that I should be able to get 3 second exposures using.

Also regarding the 294 - supposedly there is a software update that quadruples it's resolution - ie files go from 11M to 49M in size.? I haven't chased it down yet... I've got to get my light box done first.

Cheers!

On 4/27/25 08:06, Lee P. via groups.io wrote:
Sarah Matthews, a YouTuber, has posted a good video on image processing using SIRIL, and other free SW.
-- 
Geoff McLean
McLean Research Associates
Lead Night Sky Ranger, The Last Green Valley
NASA Solar System Ambassador
Adjunct Professor of Astronomy, Connecticut College
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