WLR2678
@wlr2678.bsky.social
2.2K followers 85 following 44 posts
Space enthusiast / KSP / 中文 & ENG / He, him. - Learning astrophotography @WLR_2678 on Twi
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wlr2678.bsky.social
The Cave Nebula (Sh 2-155) is a diffuse nebula in Cepheus within a larger cloud complex of various nebula types. Two nights of broadband followed by HaOIII data revealed dusty, reflective and emissive features surrounding the nebula in strong contrast with each other.

#Astronomy #Astrophotography
wlr2678.bsky.social
I think it's mostly because of my refractor's lens not being optically perfect, and I'm using a lesser corrected reducer with it (the 0.6x one), leading to more aberrations than its performance by design.
wlr2678.bsky.social
I love how easy it is to spot Polaris B even through small-ish refractors. In this 5-sec snapshot during polar alignment you can visually count the pixels to gauge separation from its bigger brother. ~10 pixels, which is exactly ~18-19" given a pixel scale of 1.85"/px😄
#Astronomy
wlr2678.bsky.social
The Crescent Nebula is a popular DSO in Cygnus, known for its distinctive appearance embedded within the Swan's rich nebulosity. The 103APO combined with small pixels on the MiniCAM8 revealed nice details in the gas shells.

Modified HOO + a little SII, ~4.5 h exposure
#Astronomy #Astrophotography
wlr2678.bsky.social
Totally, I was imaging as well haha, then watched the Bz starting to dip
wlr2678.bsky.social
#Aurora just now from Keswick north of Toronto!

#Astrophotography
wlr2678.bsky.social
Just a single 5-min Ha sub on the Crescent from the IMX585-equipped MiniCAM8M😍
wlr2678.bsky.social
Getting some shots of IC 59. Looks like I finally met Navi the reflection maker😆
wlr2678.bsky.social
The Veil Nebula, Pickering's Triangle and nearby nebulosity formed the western part of the Cygus Loop (Sh2-103) - an expansive supernova remnant ~2500 ly away that remembers the distant death of a massive star.

10 hours of Ha/OIII data captured on the Askar 103APO
#Astronomy #Astrophotography
HOO image of part of the Western Veil in the Cygnus Loop, showing details in its wispy structure.
wlr2678.bsky.social
As part of learning PixInsight, I decided to revisit M33, the Triangulum Galaxy, and experiment with continuum subtraction on some OSC Ha data from a new setup around the Askar 103APO scope.
#Astronomy #Astrophotography
The Triangulum Galaxy with added Hydrogen-alpha signal from its numerous star-forming regions.
wlr2678.bsky.social
The Sadr Region - a nebulous region at the heart of Cygnus the Swan. The Crescent Nebula swims over sprawling hydrogen-alpha clouds of the Sadr Region like a cosmic jellyfish.
#Astrophotography
The Sadr Region in the constellation Cygnus. It is filled with stellar clouds and contains some interesting standalone objects.
Reposted by WLR2678
wlr2678.bsky.social
Got 5 hours of Ha data last night and here is the updated image! #Astronomy #Astrophotography
ZWO ASI533MC + WO Z61II
Cook's Bay, ON, Canada
RGB: 242 x 80", 2024-11-03
Ha: 101 x 180", 2024-11-07
wlr2678.bsky.social
Love the details! Is this an RCT by any chance?😀
wlr2678.bsky.social
Indeed! I do find it amazing that signal and noise concepts are universal across all kinds of information types
wlr2678.bsky.social
Ha is just one of many wavelengths of interest for deep sky astro. You can read more about deep sky filters here if you are interested
optcorp.com/blogs/deep-s...
wlr2678.bsky.social
Ha is in the visible spectrum (dark-reddish coloured). However, it's usually alongside other much stronger emissions in broadband so some weaker Ha signals may be washed out, and this is where a filter that isolates Ha comes in useful.
wlr2678.bsky.social
For this photo, I'm thinking about imaging the same galaxy again but with a dual narrowband filter that isolates Ha and OIII emissions, the Triangulum Galaxy has a plethora of nebulae with strong Ha emissions so they will "pop out" when blended with the existing RGB data
wlr2678.bsky.social
In astrophotography, broadband imaging captures nearly all visible light and is good for targets such as galaxies where a lot of different lights are emitted; Using a narrowband filter isolates particular wavelengths emitted by specific targets and improves contrast against for ex. light pollution