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ltno2.bsky.social
Lt Nono
@ltno2.bsky.social
2K followers 210 following 890 posts
Northern hemisphere astronomy enthusiast and Islay Single Malt lover. Cats shall one day rule the world. 🔭🥃 🐈
https://www.astrobin.com/users/Ltno/
Alumnus Université Côte d'Azur/OCA 🔭🌌
So long and thanks for all the fish...
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ltno2.bsky.social
It's been cloudy and rainy for what seems like ages now...but this afternoon there was a small patch of clear sky and I was able to shoot the Sun in H-alpha. Our Star is always awesome 🙂. #Astrophotography #Solar
January 24, 2026 at 2:36 PM
ltno2.bsky.social
New year, new scope with diffraction spikes (an f/4 Newton), new #astrophotography shot of IC434 the Horse Head nebula.

What's there @kat-astro-bot.bsky.social ?
IC434 the Horse Head nebula shot in L-Ha-RGB using a Skywatcher 200mm Quattro Newtonian and a monochrome PlayerOne Poseidon camera. The brighter stars show diffraction spikes typical of a Newtonian scope.
January 1, 2026 at 6:19 PM
ltno2.bsky.social
J'en avais pas besoin, mais je l'ai quand même acheté. (pour offrir).

Je vous présente le coupe-pizza NCC-1701 😍
December 19, 2025 at 4:46 PM
ltno2.bsky.social
Mince, j'étais parti sur les conques 😇.
December 1, 2025 at 2:35 PM
ltno2.bsky.social
The #Sun this morning was very cooperative, shot with my Lunt 60 H-alpha scope. The rendering is in false colors (H-alpha is a deep deep red). #Solar #astrophotography
The Sun shot in H-alpha using a monochrome Zwo ASI1600GT camera and a Lunt 60 THa solar scope. This is the combination of two overlapped images: one overexposed to show the prominences and the other one to show the chromosphere details. False colors were used to render each of those overlapping images.
November 30, 2025 at 12:13 PM
ltno2.bsky.social
A bit of #astrophotography drizzling, cropping, and sizzling on #M82 to show just how gorgeous those H-alpha jets are 😍.

Can you please plate-solve this @kat-astro-bot.bsky.social ?
M82 galaxy showing H-alpha jets being expelled from its nucleus. This is a detail from a wider field of view given in this post : https://bsky.app/profile/ltno2.bsky.social/post/3m6ajatkmzs2e
November 23, 2025 at 11:44 AM
ltno2.bsky.social
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 ?
M81, M82 and NGC 3077 galaxies shot from a backyard with an Astro_Physics Starfire EDFS 130mm refractor and an PlayerOne Poseidon-M monochrome camera using LRGB and H-alpha filters. M82 shows hydrogen jets being shot out of the nucleus of M82.
November 22, 2025 at 7:19 PM
ltno2.bsky.social
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/
M33 the triangulum galaxy. This image combine images from three different amateur astronomers for a total of approximately 17 hours of integration time. Details are on Astrobin : https://www.astrobin.com/ibi2sb/
November 15, 2025 at 5:44 PM
ltno2.bsky.social
The Star we know best, the closest one to us, the #Sun, shot around mid day in H-alpha with my little Lunt Solar scope. #solar #astrophotography
The Sun in H-alpha in a black and white image, showing prominences and the chromosphere.
November 11, 2025 at 1:59 PM
ltno2.bsky.social
What's cool about #astrophotography 🔭📷 is that you can stack frames to create nice images, and also use those frames to do some aperture photometry (here with AIJ on the eclipsing binary V1337 CAS near IC1805 Heart Nebula AIJ). Ain't that cool people 🤓?
What do you see @kat-astro-bot.bsky.social ?
IC1805 the Heart Nebula shot in HOO using a 76 mm refractor and a astronomy cooled monochrome camera (a PlayerOne Poseidon-M). 120s subs. 83xH-alpha. 54xOIII Astro Image J screen showing the selection of the eclipsing binary V1337 CAS and reference stars to start an aperture photometry analysis. Output plot of the photometry measurements of the eclipsing binary V1337 CAS over 4.5 hours, showing a peak in flux.
November 9, 2025 at 10:28 AM
ltno2.bsky.social
Solar #astrophotography 🔭📷 does have its perks...like getting your images taken in 10 minutes between two rainy episodes.

This is the Sun as it was late this afternoon in France, shot with my Lunt 60 and my ASI1600GT mono camera and dodging quite a few clouds and rainy spells.
The Sun shot late this afternoon from somewhere in France, using a Lunt 60mm H-alpha solar scope and a monochrome ASI1600GT camera. Superposition of one overexposed image for the prominences, and a normal one for the chromosphere. Coloring using Gimp. Lunt 60mm H-alpha solar scope and a monochrome ASI1600GT camera on a hand-driven ALT-AZ mount.
November 2, 2025 at 5:41 PM
ltno2.bsky.social
October 30, 2025 at 9:49 PM
ltno2.bsky.social
Dark dust clouds in Perseus with the #Embryo nebula NGC1333 in the bottom left corner. Shot this 7 days ago from my backyard. #astrophotgraphy 🔭📷 reveals what our eyes won't always see....but it's not because we don't see it that it's not there. Where do you put this @kat-astro-bot.bsky.social?
Dark interstellar clouds shot in LRGB with a 130mm Astro-Physics Starfire refractor and a PlayerOne Poseidon-M monochrome camera. 100x120s for luminance. 45x60s for each RGB channel. The target is the surrounding area about NGC1333 the Eskimo nebula which sits in the lower left part of the image. Dark interstellar clouds shot in LRGB with a 130mm Astro-Physics Starfire refractor and a PlayerOne Poseidon-M monochrome camera. 100x120s for luminance. 45x60s for each RGB channel. The target is the surrounding area about NGC1333 the Eskimo nebula which sits in the lower left part of the image.
October 23, 2025 at 8:18 PM
ltno2.bsky.social
I tried my best to capture an L-RGB image of comet C/2025 A6 Lemmon using a monochrome cam. It's feasable, but it's not as nice and starightforward as with a color cam because Comets move fast!!!!! #astrophotography.
Where's this @kat-astro-bot.bsky.social ?
Comet C/2025 A6 Lemmon shot mid October 2025 in L-RGB with a 130mm Astro-Physics Starfire refracator and a monochrome Player One monochrome camera.
October 17, 2025 at 7:19 PM
ltno2.bsky.social
Hi all #astronomy fans out there ✨! I managed to shoot the Cocoon Nebula (IC5146) and its trailing dust train over the past two nights, using my backyard #astrophotography setup. The weather Gods blessed me I guess 😇. Lots of Hydrogen in the background.
What's out there @kat-astro-bot.bsky.social ?
The Cocoon Nebula (IC5146) shot over two nights from a backyard rig using a 130mm Astro-Physics Starfire refractor and a PlayerOne Poseidon-M Monochrome camera using broad band filters and a narrow band H-alpha filter. 60x60s subs for each RGB channel. 150x120s for the Luminance channel and 138x180s for the H-alpha channel.
October 17, 2025 at 11:48 AM
ltno2.bsky.social
Ce n'est pas qu'une question de taille 😬, la veille à 342mm avec la petite lulu
October 14, 2025 at 9:16 AM
ltno2.bsky.social
Lemmon juice being squeezed out of the comet C/2025 A6 #astrophotography. Shot this evening but it's really low so it is tough to even think about getting this one done in RGB.
Can you try and solve this one @kat-astro-bot.bsky.social ?
Comet C/2025 A6 Lemmon shot in Luminance with a 130mm AstroPhysics refractor and a PlayerOne Poseidon monochrome camera.
October 13, 2025 at 10:35 PM
ltno2.bsky.social
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.
The North America, Pelican and gulf of Mexico nebulae shot in SHO palette and stars in RGB using a 130mm AstroPhysics refractor and a PlayerOne Poseidon-M monochrome camera.
October 13, 2025 at 8:13 PM
ltno2.bsky.social
From my backyard : Summer is going away gracefully, and with it the North America Nebula NGC7000 in the Milky Way plane. I count around 69 000 stars in this #Astrophotography 🔭📷picture!
Can you guess where this is @kat-astro-bot.bsky.social ?
From a backyard somewhere in France, the North America nebula (NGC7000) shot with RGB and narrow band H-alpha and OIII filters using a TeleskopService 76mm refractor and a Player One Poseidon-M Monochrome astronomy camera.
October 12, 2025 at 3:03 PM
ltno2.bsky.social
The Tadpoles in Auriga shot in narrow band SHO (Sulfur, Hydrogen, Oxygen) from my backyard during last night's #Astrophotography 🔭📷 session. Slightly psychedelic colors but I like those 🫠. The stars are RGB though. Am I spot on @kat-astro-bot.bsky.social ?
October 5, 2025 at 5:11 PM
ltno2.bsky.social
The bane of all #astrophotography 🔭 📷 amateurs is stars throwing a tantrum right next to tiny, delicate, nebulae...Navi is such a star, glowing from just beyond the top left corner of this image of the Ghost of Cassiopeia #IC63 I shot from my backyard 🙂. What do you see @kat-astro-bot.bsky.social
The Ghost of Cassiopeia nebula shot with a 130mm Astro-Physics refractor and a dedicated cooled Poseidon-M monochrome astronomy camera. Filters used were RGB Antlia V-Pro filters for the RGB stars, and Baader 6.5nm narrow band H-alpha and OIII filters for the emission lines of hydrogen and oxygen. Narrowband images : 139x120s for H-alpha, 109x120s for OIII. RGB images : 60x30s for each RGB channel.
October 2, 2025 at 8:06 PM
ltno2.bsky.social
Bon, hum, les LLM ont encore quelques progrès à faire 😅
September 23, 2025 at 9:05 PM
ltno2.bsky.social
Alors voici, et maintenant je sais que j'ai convaincu JD de passer à une caméra Monochrome ☺️
September 21, 2025 at 3:42 PM
ltno2.bsky.social
The young Pleiades in all their glory, which I managed to shoot two nights ago using my backyard #Astrophotography 🔭📷 setup. I made a bad attempt at fitting a 100My isochrone over my poorly calibrated data to show this...don't try this at home kids 😇.
@kat-astro-bot.bsky.social, what do you see?
The M45 Pleiades star cluster shot with an Astro-Physics 130mm refractor, using a Poseidon-M monochrome camer and Antlia LRGB filters. A very bad attempt at fitting an isochrone over the color/magnitude plot of the Pleiades raw data shot with amateur equipment. Data reduction was done with AstroImageJ, sources were extracted with Source Extractor, TopCat was used to estimate zero point with PanStarrs catalog data for magnitudes, and GAIA EDR3 for parallax; and plot the diagram.
September 19, 2025 at 4:46 PM
ltno2.bsky.social
He'll die someday, just like the characters in Barry Lyndon.
September 3, 2025 at 8:59 PM