SadrAstro Observatory
@sadrastro.com
Skeeting across the cosmos. #space #astronomy #astrophotography #science - Join our Online Observatory based in Texas offering downloads of our beautiful dark-sky wide-field and DSO data sets. https://sadrastro.com
I apologize in advance for the inevitable clouds ☁️
February 4, 2025 at 7:29 PM
I apologize in advance for the inevitable clouds ☁️
In your mobile or web app click the PIN button to save the feed and then joy it! (upper right corner)
February 4, 2025 at 3:35 PM
In your mobile or web app click the PIN button to save the feed and then joy it! (upper right corner)
Ok, which one of you is the real one? @bellagold.bsky.social or @waltwatsonastro.bsky.social - these are remarkably identical in too many ways.
February 1, 2025 at 4:50 PM
Ok, which one of you is the real one? @bellagold.bsky.social or @waltwatsonastro.bsky.social - these are remarkably identical in too many ways.
UI is very familiar :)
January 29, 2025 at 12:10 AM
UI is very familiar :)
#OTD, 1986, NASA's Voyager 2 spacecraft made its closest approach to Uranus, passing within 81,500 kilometers of the planet's cloud tops. This historic flyby provided the first detailed images & data on Uranus, including information about its moons, rings, atmosphere, & magnetic field.
January 24, 2025 at 4:02 PM
#OTD, 1986, NASA's Voyager 2 spacecraft made its closest approach to Uranus, passing within 81,500 kilometers of the planet's cloud tops. This historic flyby provided the first detailed images & data on Uranus, including information about its moons, rings, atmosphere, & magnetic field.
This week in 1610, Galileo Galilei revolutionized astronomy by discovering Jupiter's four largest moons—Io, Europa, Ganymede, and Callisto—now known as the Galilean moons. He documented these findings in his groundbreaking work, Sidereus Nuncius (The Starry Messenger). #astronomy #science #jupiter
January 15, 2025 at 3:25 PM
This week in 1610, Galileo Galilei revolutionized astronomy by discovering Jupiter's four largest moons—Io, Europa, Ganymede, and Callisto—now known as the Galilean moons. He documented these findings in his groundbreaking work, Sidereus Nuncius (The Starry Messenger). #astronomy #science #jupiter
Here is our processed version of this data set! These masters are larger file since they are 2x drizzled. When processing, we recommend resampling back down to 50% so they're back to native size.
January 13, 2025 at 9:07 PM
Here is our processed version of this data set! These masters are larger file since they are 2x drizzled. When processing, we recommend resampling back down to 50% so they're back to native size.
We then process our LRGB data and create these beautiful images we love to share. There is a bit more work to go from stretched image to final completion - we'll talk more about this in the future.
January 12, 2025 at 7:53 PM
We then process our LRGB data and create these beautiful images we love to share. There is a bit more work to go from stretched image to final completion - we'll talk more about this in the future.
A quick "stretch" and wow - things POP out at you! Here we're looking at a luminance frame for the Horsehead / Barnard's loop area.
January 12, 2025 at 7:53 PM
A quick "stretch" and wow - things POP out at you! Here we're looking at a luminance frame for the Horsehead / Barnard's loop area.
An unstretched calibrated exposure just shows a few bright objects. At least we don't see a ton of hot pixels like the dark frame and no big smudges where dust motes cause those "fingerprint" style circles. Some of this, we can't see until we "stretch" so let's stretch this image.
January 12, 2025 at 7:53 PM
An unstretched calibrated exposure just shows a few bright objects. At least we don't see a ton of hot pixels like the dark frame and no big smudges where dust motes cause those "fingerprint" style circles. Some of this, we can't see until we "stretch" so let's stretch this image.
Calibration uses special frames—darks, flats, and bias frames—to fix these issues. These act like a digital eraser, cleaning your images before you process them.
Flat Frames will remove Vignetting
Dark Frames remove "Dark Current"
Bias Fames remove sensor Bias
Flat frames are kind of cool.
Flat Frames will remove Vignetting
Dark Frames remove "Dark Current"
Bias Fames remove sensor Bias
Flat frames are kind of cool.
January 12, 2025 at 7:53 PM
Calibration uses special frames—darks, flats, and bias frames—to fix these issues. These act like a digital eraser, cleaning your images before you process them.
Flat Frames will remove Vignetting
Dark Frames remove "Dark Current"
Bias Fames remove sensor Bias
Flat frames are kind of cool.
Flat Frames will remove Vignetting
Dark Frames remove "Dark Current"
Bias Fames remove sensor Bias
Flat frames are kind of cool.
Without calibration, your stunning image might be obscured by:
Hot pixels (bright specks from your camera sensor).
Dust motes (dark spots from particles on your optics).
Vignetting (uneven brightness across the image).
On a large sensor with 10s of millions of pixels a dark frame looks like this:
Hot pixels (bright specks from your camera sensor).
Dust motes (dark spots from particles on your optics).
Vignetting (uneven brightness across the image).
On a large sensor with 10s of millions of pixels a dark frame looks like this:
January 12, 2025 at 7:53 PM
Without calibration, your stunning image might be obscured by:
Hot pixels (bright specks from your camera sensor).
Dust motes (dark spots from particles on your optics).
Vignetting (uneven brightness across the image).
On a large sensor with 10s of millions of pixels a dark frame looks like this:
Hot pixels (bright specks from your camera sensor).
Dust motes (dark spots from particles on your optics).
Vignetting (uneven brightness across the image).
On a large sensor with 10s of millions of pixels a dark frame looks like this:
Processing some widefield data on Horsehead and Barnard's loop. I love zooming in to see the details really coming in well. #nebula #astrophotography #horsehead Working on getting the contrast/separation down and will share a final image shortly.
January 11, 2025 at 7:17 PM
Processing some widefield data on Horsehead and Barnard's loop. I love zooming in to see the details really coming in well. #nebula #astrophotography #horsehead Working on getting the contrast/separation down and will share a final image shortly.
North America Nebula imaged in SHO with Antlia pro 3nm filters on a Red Cat 51 running at 250mm FL. I'll share a blog post tomorrow describing the region, imaging it, as well as providing access to download our SHO masters or raw data so YOU can try and process it! #astrophotography #nebula 🔭
January 9, 2025 at 11:21 PM
North America Nebula imaged in SHO with Antlia pro 3nm filters on a Red Cat 51 running at 250mm FL. I'll share a blog post tomorrow describing the region, imaging it, as well as providing access to download our SHO masters or raw data so YOU can try and process it! #astrophotography #nebula 🔭
Here we've added the Oii and Sii layers and applied Color. This color is RGB mapping of Sii, Ha and Oiii respectively. We'll work on accentuating some of the colors to bring out contrast and import a synthetic "luminance" extraction layer to try and get it to "pop"
January 9, 2025 at 10:26 PM
Here we've added the Oii and Sii layers and applied Color. This color is RGB mapping of Sii, Ha and Oiii respectively. We'll work on accentuating some of the colors to bring out contrast and import a synthetic "luminance" extraction layer to try and get it to "pop"
A "Starless" view of the North America Nebula imaged with a hydrogen-alpha filter. This narrowband approach lets us see the intense glow of ionized hydrogen gas, a key component in star formation regions. Enjoy the details! #astrophotography 🔭
January 9, 2025 at 10:07 PM
A "Starless" view of the North America Nebula imaged with a hydrogen-alpha filter. This narrowband approach lets us see the intense glow of ionized hydrogen gas, a key component in star formation regions. Enjoy the details! #astrophotography 🔭
Doing a full integration of our Horsehead Nebula data. Going to need almost 275GB of storage space to process this! I've been in tech long enough when I remember data sets this large were once "BIGDATA" :D
January 3, 2025 at 4:45 PM
Doing a full integration of our Horsehead Nebula data. Going to need almost 275GB of storage space to process this! I've been in tech long enough when I remember data sets this large were once "BIGDATA" :D
Seagull Nebula is available to members. ~62GB of full frame mono 3nm SHO data! I Can't wait to see what people are able to process with this data set! Some Example SHO Subs below. 🔭
January 2, 2025 at 8:59 PM
Seagull Nebula is available to members. ~62GB of full frame mono 3nm SHO data! I Can't wait to see what people are able to process with this data set! Some Example SHO Subs below. 🔭
Did a mid-point integration of Horsehead + Barnard's loop and its looking great! This is the Red Channel from imaging LRGB. #astrophotography 🔭
January 2, 2025 at 3:40 AM
Did a mid-point integration of Horsehead + Barnard's loop and its looking great! This is the Red Channel from imaging LRGB. #astrophotography 🔭
Currently reading Glass Universe. Picked up a copy at one of my favorite used bookstores in Houston that has one of the best science sections i’ve ever seen - Kaboom books.
December 27, 2024 at 7:31 PM
Currently reading Glass Universe. Picked up a copy at one of my favorite used bookstores in Houston that has one of the best science sections i’ve ever seen - Kaboom books.
Sorry, autocorrect removed the important part it's the " you need. The shift is upper case so it would be " then a for lowercase umlaut a and then " shift A for uppercase umlaut A using the English (International) keyboard layout.
It's a bit goofy to configure in windows 11
It's a bit goofy to configure in windows 11
December 26, 2024 at 4:37 PM
Sorry, autocorrect removed the important part it's the " you need. The shift is upper case so it would be " then a for lowercase umlaut a and then " shift A for uppercase umlaut A using the English (International) keyboard layout.
It's a bit goofy to configure in windows 11
It's a bit goofy to configure in windows 11
On December 24, 1968, the Apollo 8 astronauts became the first humans to orbit the moon and capture the famous Earthrise photograph. #onthisday
December 24, 2024 at 4:21 PM
On December 24, 1968, the Apollo 8 astronauts became the first humans to orbit the moon and capture the famous Earthrise photograph. #onthisday
Skies are clear, but that 66% Moon is BRIGHT BRIGHT BRIGHT. We've switched from imaging to running some calibration and equipment checks for the rest of the night. We expect once moon averages 50% or less our avoidance can work well enough to image in narrowband when moon is up and RGB when down.
December 21, 2024 at 6:25 AM
Skies are clear, but that 66% Moon is BRIGHT BRIGHT BRIGHT. We've switched from imaging to running some calibration and equipment checks for the rest of the night. We expect once moon averages 50% or less our avoidance can work well enough to image in narrowband when moon is up and RGB when down.
We have cool things like this to see in the sky and people are asking about drones???
December 21, 2024 at 6:07 AM
We have cool things like this to see in the sky and people are asking about drones???
We're working on a custom request from one of our users tonight - the Seagull nebula. This is a single 5-minute Ha exposure and it's looking great! #astrophotography 🔭Gathering 7 hours of data for each S,H,O Filter from our Bortle 1 skies.
December 21, 2024 at 6:03 AM
We're working on a custom request from one of our users tonight - the Seagull nebula. This is a single 5-minute Ha exposure and it's looking great! #astrophotography 🔭Gathering 7 hours of data for each S,H,O Filter from our Bortle 1 skies.