First image from the JWST!!
- Ron Schmit
- Posts: 1297
- Joined: Thu Jun 10, 2004 12:41 pm
First image from the JWST!!
A single star... or is that 18?
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- Screenshot_20220211-113236_Google News.jpg (23.38 KiB) Viewed 6999 times
Re: First image from the JWST!!
Since JWST is reported to be able to "look back in time", would it be this might represent the star cluster our sun was part of billions of years ago. The elongated disks of pre-planetary matter.
Clear skies,
Merle Hiltner
MAS Eagle Lake Observatory
Onan Observatory • Sylvia A. Casby Observatory • HotSpot Classroom
merle.hiltner@gmail.com
Merle Hiltner
MAS Eagle Lake Observatory
Onan Observatory • Sylvia A. Casby Observatory • HotSpot Classroom
merle.hiltner@gmail.com
Re: First image from the JWST!!
We have people in the club who can help with collimation...
Matt Dunham
MAS Treasurer & member since 2018
Meade LX200RC 12-inch (my portable observatory)
Celestron SC-8" w/fork wedge (my travel scope)
MAS Treasurer & member since 2018
Meade LX200RC 12-inch (my portable observatory)
Celestron SC-8" w/fork wedge (my travel scope)
- setnes
- Posts: 541
- Joined: Fri Jun 12, 2015 10:44 pm
- Real Name: Kristopher Setnes
- Location: Bloomington, MN
- Contact:
Re: First image from the JWST!!
Let me know when you get up there, we'll stay here and tell you which screws to turn.
Re: First image from the JWST!!
I waited 15 years and spent $10 billion dollars and all I got was this lousy Strehl ratio of 0.0001. - Chris Burke
Ron Cooper
Minnetonka, MN
ELO Keyholder
Minnetonka, MN
ELO Keyholder
- Ron Schmit
- Posts: 1297
- Joined: Thu Jun 10, 2004 12:41 pm
Re: First image from the JWST!!
[attachment=0]Screenshot_20220211-174053_Google News.jpg[/attachment]
This shows which image is from which mirror.
This shows which image is from which mirror.
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- Frank Kenney
- Posts: 15
- Joined: Sat Feb 09, 2019 3:16 pm
Re: First image from the JWST!!
I feel so much better now, diffraction spikes and all, after taking this image when I first heard it would be the one.
- Deane Clark
- Posts: 2454
- Joined: Wed May 19, 2004 11:38 pm
- Location: Mpls
Re: First image from the JWST!!
A nice short video on the first light image and the collimation procedure:
https://youtu.be/QlwatKpla8s
https://youtu.be/QlwatKpla8s
Deane Clark
Eagle Lake Observatory keyholder
------------------------
I can quit any time I want. I just don't want to.
www.aponon.org
Eagle Lake Observatory keyholder
------------------------
I can quit any time I want. I just don't want to.
www.aponon.org
- Dick Jacobson
- Posts: 1399
- Joined: Fri Jun 04, 2004 9:21 pm
- Location: Cottage Grove, MN
Re: First image from the JWST!!
Superb video! Another interesting factoid, the alignment star HD84406 is actually too bright for routine imaging.
30-inch homemade Newtonian with periscope
20-inch homemade equatorial Newtonian with periscope
14-inch homemade equatorial Newtonian
10-inch Newtonian that folds flat
6-inch Russian Maksutov-Newtonian on Vixen equatorial mount
Too many small scopes and binoculars to mention
20-inch homemade equatorial Newtonian with periscope
14-inch homemade equatorial Newtonian
10-inch Newtonian that folds flat
6-inch Russian Maksutov-Newtonian on Vixen equatorial mount
Too many small scopes and binoculars to mention
- setnes
- Posts: 541
- Joined: Fri Jun 12, 2015 10:44 pm
- Real Name: Kristopher Setnes
- Location: Bloomington, MN
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Re: First image from the JWST!!
I've been scratching my head trying to understand how they determined which star was from which mirror. They eluded to it in the video, but didn't come out and say it exactly. Are they using the "selfie" images to determine which mirror is brighter for each sub exposure in the mosaic? If so, that's pretty cool. If that's not how they're doing it, I'm still scratching my head.
Re: First image from the JWST!!
I had the same question... Could they be using star shapes to identify the mirror corresponding to an image?
- Ron Schmit
- Posts: 1297
- Joined: Thu Jun 10, 2004 12:41 pm
Re: First image from the JWST!!
Here are the stars lined up with the corresponding mirror segments.
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- Posts: 236
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- Real Name: Mark Petersen
- Location: Maple Grove, MN
Re: First image from the JWST!!
Could be that once they found the star images in the mosaic, they moved each mirror one at a time and took a photo after each mirror movement to see which star image moved.
Re: First image from the JWST!!
"We are pointing the telescope at a bright, isolated star (HD 84406) to capture a series of images that are then stitched together to form a picture of that part of the sky. We don’t have just one mirror looking at this star; we have 18 mirrors, each of which is initially tilted towards a different part of the sky. As a result, we’ll actually capture 18 slightly shifted copies of the star – each one out of focus and uniquely distorted. We refer to these initial star-copies as 'segment images.'
One by one, we will move the 18 mirror segments to determine which segment creates which segment image. After matching the mirror segments to their respective images, we can tilt the mirrors to bring all the images near a common point for further analysis. We call this arrangement an 'image array.'"
https://webb.nasa.gov/content/webbLaunc ... sWebb.html
One by one, we will move the 18 mirror segments to determine which segment creates which segment image. After matching the mirror segments to their respective images, we can tilt the mirrors to bring all the images near a common point for further analysis. We call this arrangement an 'image array.'"
https://webb.nasa.gov/content/webbLaunc ... sWebb.html
Clear skies,
Merle Hiltner
MAS Eagle Lake Observatory
Onan Observatory • Sylvia A. Casby Observatory • HotSpot Classroom
merle.hiltner@gmail.com
Merle Hiltner
MAS Eagle Lake Observatory
Onan Observatory • Sylvia A. Casby Observatory • HotSpot Classroom
merle.hiltner@gmail.com
- setnes
- Posts: 541
- Joined: Fri Jun 12, 2015 10:44 pm
- Real Name: Kristopher Setnes
- Location: Bloomington, MN
- Contact:
Re: First image from the JWST!!
Thanks Merle. That validates Mark's theory.
It also means this had nothing to do with it.
It also means this had nothing to do with it.
- Ron Schmit
- Posts: 1297
- Joined: Thu Jun 10, 2004 12:41 pm
Re: First image from the JWST!!
Cooling down!!
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Current status.
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Current status.
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Re: First image from the JWST!!
Thanks for sharing!
Looks like cooling is quicker away from the shield.
Did they turn on the fans for cooling it down?! ...
Looks like cooling is quicker away from the shield.
Did they turn on the fans for cooling it down?! ...
- setnes
- Posts: 541
- Joined: Fri Jun 12, 2015 10:44 pm
- Real Name: Kristopher Setnes
- Location: Bloomington, MN
- Contact:
Re: First image from the JWST!!
Fans in space?Did they turn on the fans for cooling it down?! ...
Re: First image from the JWST!!
Sorry, that was an attempted joke... it failed...
- Deane Clark
- Posts: 2454
- Joined: Wed May 19, 2004 11:38 pm
- Location: Mpls
Re: First image from the JWST!!
I got it
I was going to suggest they should have made the whole thing out of SMAs
Deane Clark
Eagle Lake Observatory keyholder
------------------------
I can quit any time I want. I just don't want to.
www.aponon.org
Eagle Lake Observatory keyholder
------------------------
I can quit any time I want. I just don't want to.
www.aponon.org
- Dick Jacobson
- Posts: 1399
- Joined: Fri Jun 04, 2004 9:21 pm
- Location: Cottage Grove, MN
Re: First image from the JWST!!
What's an SMA?Deane Clark wrote: ↑Fri Feb 18, 2022 10:42 amI got it
I was going to suggest they should have made the whole thing out of SMAs
30-inch homemade Newtonian with periscope
20-inch homemade equatorial Newtonian with periscope
14-inch homemade equatorial Newtonian
10-inch Newtonian that folds flat
6-inch Russian Maksutov-Newtonian on Vixen equatorial mount
Too many small scopes and binoculars to mention
20-inch homemade equatorial Newtonian with periscope
14-inch homemade equatorial Newtonian
10-inch Newtonian that folds flat
6-inch Russian Maksutov-Newtonian on Vixen equatorial mount
Too many small scopes and binoculars to mention
- Ron Schmit
- Posts: 1297
- Joined: Thu Jun 10, 2004 12:41 pm
Re: First image from the JWST!!
The SMA is the Secondary Mirror Assembly.
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Labeled here as the "Secondary Mirror"
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Labeled here as the "Secondary Mirror"
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- Deane Clark
- Posts: 2454
- Joined: Wed May 19, 2004 11:38 pm
- Location: Mpls
Re: First image from the JWST!!
Another attempted “joke”. The SMA is the dark blue circle in the upper right, the coldest mirror “segment” at 30.82K.
Deane Clark
Eagle Lake Observatory keyholder
------------------------
I can quit any time I want. I just don't want to.
www.aponon.org
Eagle Lake Observatory keyholder
------------------------
I can quit any time I want. I just don't want to.
www.aponon.org
- Dick Jacobson
- Posts: 1399
- Joined: Fri Jun 04, 2004 9:21 pm
- Location: Cottage Grove, MN
Re: First image from the JWST!!
So the Webb is just like my Newtonians. The secondary mirror always gets coldest and dewy/frosty, putting an end to my observing session.
30-inch homemade Newtonian with periscope
20-inch homemade equatorial Newtonian with periscope
14-inch homemade equatorial Newtonian
10-inch Newtonian that folds flat
6-inch Russian Maksutov-Newtonian on Vixen equatorial mount
Too many small scopes and binoculars to mention
20-inch homemade equatorial Newtonian with periscope
14-inch homemade equatorial Newtonian
10-inch Newtonian that folds flat
6-inch Russian Maksutov-Newtonian on Vixen equatorial mount
Too many small scopes and binoculars to mention
Re: First image from the JWST!!
Hope they packed a hair dryer....Dick Jacobson wrote: ↑Sat Feb 19, 2022 1:15 pm So the Webb is just like my Newtonians. The secondary mirror always gets coldest and dewy/frosty, putting an end to my observing session.
Merle
Clear skies,
Merle Hiltner
MAS Eagle Lake Observatory
Onan Observatory • Sylvia A. Casby Observatory • HotSpot Classroom
merle.hiltner@gmail.com
Merle Hiltner
MAS Eagle Lake Observatory
Onan Observatory • Sylvia A. Casby Observatory • HotSpot Classroom
merle.hiltner@gmail.com