Julien Hédoux
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jhedoux.bsky.social
Julien Hédoux
@jhedoux.bsky.social
Chief Technical Officer, Astrophotographer

#astrophotography
https://app.astrobin.com/u/julienhedoux
Setup :
🔭 : FRA400 / HEQ5 pro v2
📸 : OSC Poseidon-C PRO (IMX571)
🔵 : Optolong filters (SII 6nn, Ha/Oii L-Ultimate 3nn, L-Pro)
Pinned
✨ Target : NGC 7000 - The Cygnus Wall
🔭 Scope : FRA400
📷 POA Poseidon C (OSC)
🔵 Filters L-Ultimate/SII/L-Pro
🕐 13 hours (june 2025)

Details 👉 app.astrobin.com/i/edt08c
Astrometry : @kat-astro-bot.bsky.social
Tags : #Astronomy
NGC7000 - The Cygnus Wall - AstroBin
An image on AstroBin.
app.astrobin.com
✨ Target : M42 - The Great Orion Nebula (2025 edit)
🔭 Focal length : 400mm
🕐 Integration : 41min (nov 2025)
📍 France (near from Paris)

Details 👉 app.astrobin.com/i/3qr791
Astrometry : @kat-astro-bot.bsky.social
Tags : #Astronomy #Astrophotography
November 25, 2025 at 9:50 PM
Reposted by Julien Hédoux
Menkib and the California Nebula. After failing to get the whole nebula into the FOV, I tried something different: focusing on the tension between that beast of a star and the nebula.
Gear: 130/910 mm APO, ASI 2600MM Pro & SHORGB filters. Total exposure: ~15 hours over 4 nights. #astrophotography
November 23, 2025 at 5:17 PM
Reposted by Julien Hédoux
The Pleiades, M45, a beauty in the dark. Open star cluster only 17.5 LY away in Taurus. Recoginzed since prehistoric times.
 5 hours of broadband exposures on 2015-11-14 UT under Bortle 3 skies from Bad Wolf Ranch, Texas. WO RedCat 250/51mm, UV/IR cut filter, ASI2600 MC cam
#astrophotography
November 23, 2025 at 3:55 PM
Cette comète est vraiment ... très rapide!
15sec de pose par image! 🤯
November 23, 2025 at 3:20 PM
Reposted by Julien Hédoux
Marrying H-alpha and LRGB data while doing #astrophotography can reveal cool things in space like those reddish jets of matter coming out of the nucleus of M82 (a buddy of M81, one of our neighbor galaxies).

Where do you put this @kat-astro-bot.bsky.social ?
November 22, 2025 at 7:19 PM
☄️ Target : Comet C/2025 K1 ATLAS
🔭 Scope : FRA400
🕐 Integration : 10 x 30sec

An other Comet catched! 💫😜
November 23, 2025 at 1:02 AM
Star Flare in Nebula✨🤩
November 22, 2025 at 12:59 AM
Les données RGB sont prometteuses.
Un peu d'hydrogène ionisé (Ha) en stock également.

Reste à doser entre les couches pour faire ressortir les nébulosités de cette galaxie 🙂
November 18, 2025 at 4:07 PM
🔭 Capturing photons in progress ...
✨ M33 Galaxy

3.2 M light years
November 17, 2025 at 8:52 PM
Reposted by Julien Hédoux
Team work in #astrophotography 🔭📷 gives nice results. Here is M33, a neighboring galaxy combining images from 3 setups. I'm always amazed with its bright blue stars that can be resolved from several million light years away.

@kat-astro-bot.bsky.social where's this please?

www.astrobin.com/ibi2sb/
November 15, 2025 at 5:44 PM
✨ Target : IC 5146 (2025) / SH2-125 - Cocoon Nebula
🔭 Scope : FRA400
🕐 Integration : 1h 4m (july 2025)

Details 👉 app.astrobin.com/i/vm9b1a
Astrometry : @kat-astro-bot.bsky.social
Tags : #Astronomy #Astrophotography
November 16, 2025 at 2:00 PM
✨ Target : M52 - NGC 7635 - SH 2-157
🔭 Scope : FRA400
📷 POA Poseidon C (OSC)
🔵 Filters L-Ultimate/SII/L-Pro
🕐 37min (october 2025)

Bubble Nebula and M52 cluster

Astrometry : @kat-astro-bot.bsky.social
Tags : #Astronomy #nebula #cluster
November 10, 2025 at 11:13 PM
Reposted by Julien Hédoux
La galaxie d’Andromède (M31) et ses deux galaxies satellites M32 et M110, dans la constellation d’Andromède. Image composite combinant vues couleur et vues avec un filtre spécifique à l’émission Ha de l’hydrogène.

Détails techniques: app.astrobin.com/i/npf0wr

#astrophotography
November 10, 2025 at 10:12 AM
En astrophotographie, la météo nous oblige à la patience, lorsque les nuages traversent la voûte céleste.

Cependant, capturer les Pléiades (M45) et le cluster dans la nébuleuse des têtards (IC410) à travers ces nuages, donnent un effet de flou sur les étoiles assez magnifique.
November 9, 2025 at 1:01 AM
Reposted by Julien Hédoux
Wolf’s Cave Nebula (LDN 1217 / vdB 152) captured on two nights a couple of weeks ago 😊🔭

This was shot on the EdgeHD 8 with Hyperstar for a total integration time of about 8.5 hours. I combined OSC and mono Ha data for this image.

#Astrophotography

@kat-astro-bot.bsky.social‬ what do you see?
November 5, 2025 at 7:01 PM
🎯 M27
💫 Vulpecula
📅 August 2025
⏱️ 17 x 180s

#astronomy
November 8, 2025 at 7:26 PM
Reposted by Julien Hédoux
🎉 Siril 1.4.0 RC1 is out!
First Release Candidate with new features, improvements, and bug fixes.
📥 Download: siril.org/download/202...
🐛 Test it and report issues on GitLab!
Thanks to our contributors and community!
Clear skies! ✨
Siril 1.4.0 RC1
Introduction Major fixes in RC1 CFA image processing and debayering Drizzle and sequence handling Stability and robustness File and sequence handling ...
siril.org
November 8, 2025 at 7:40 AM
On teste, encore et encore, même à travers les nuages 😶‍🌫️😜
J'ai même un morceau du cluster M12 avec la comète C/2025 A6 Lemmon 💫☄️

C'est complexe, notamment au crépuscule, les nuages sont toujours présents.
November 3, 2025 at 11:24 PM
Entre quelques nuages (😅), que dis-je, une marée de brume lunaire (😶‍🌫️), j'ai tout de même réussi à capturer saturne à côté et 4 de ses lunes.
L'ensemble autour de notre propre satellite, notre Lune.
November 3, 2025 at 10:49 PM
Capturer la comète C/2025 R2(SWAN) ... ☄️

Un petit ovni vert, perceptible à travers les fabuleux voiles nuageux, devant une demi-lune brumeuse.

Un vrai bolide interstellaire, bien plus que C/2025 A6 Lemmon sur l'écran !

Si vous voulez la voir en meilleure qualité :) bsky.app/profile/mart...
November 1, 2025 at 1:34 AM
Reposted by Julien Hédoux
I decided to shoot the Horsehead & Flame Nebulae since I already had my color camera attached for the comet. This uses no filter so it’s displaying true RGB color.

#nebula #horsehead #horseheadnebula #flamenebula #ngc2024 #ic434 #astronomy #astrophotography #space #askar #fra400 #asi294mcpro
October 26, 2025 at 7:48 PM
En cette fin de semaine, j'en ai profiter pour terminer mes scripts Siril de pré-traitement afin d'automatiser la génération des DOFs.

Puis tester le résultat sur les données capturées sur l'étalonnage de la Poséidon C Pro après son changement de carte mère.

Résultat sympa après 150x180s :)
October 24, 2025 at 11:06 PM
Reposted by Julien Hédoux
The area around LDN 879 in the Cygnus constellation, close to the bright star Sadr, about 5,000 light years away from earth. Not the most popular target in Cygnus, but there’s a lot going on here. A complete rework of my narrowband data captured with an 8" Newton & ASI1600mm. #astrophotography
October 19, 2025 at 6:25 PM
Reposted by Julien Hédoux
The North America, Pelican and gulf of Mexico (yep, not the "gulf of America" 😇) nebulae to which I added SII subs last night from my backyard. SHO is an unusual #Astrophotography 🔭📷 palette but I do like it.
I'm pretty sure @kat-astro-bot.bsky.social will solve this one in a breeze.
October 13, 2025 at 8:13 PM
Reposted by Julien Hédoux
Here’s a wide shot of the Pelican & North American Nebulae. I used my trusty refractor telescope along with a 0.7x reducer. It was also my first time shooting monochrome on this scope #ngc7000 #northamericannebula #ic5070 #pelicannebula #space #astronomy #astrophotography #askar #fra400 #nebula
October 13, 2025 at 9:18 PM