Stefan Kellner 🔭
@stefankellner.bsky.social
Hobby Astrophotographer in Berlin/Germany. No DMs please. This is my astrophotography account. Over there is my photography account: https://bsky.app/profile/stefankellnerphoto.bsky.social
🔭CTA 1 (aka SNR G119.5+10.2) is a huge supernova remnant in Cepheus. It's very faint. The small bright speck is NGC 40, a planetary nebula. Follow the link below to zoom in.
#CTA1 #SNRG119.5+10.2 #ngc40 #astrophotography #astronomy #trevincaskies
Large: app.astrobin.com/i/u5rscm
#CTA1 #SNRG119.5+10.2 #ngc40 #astrophotography #astronomy #trevincaskies
Large: app.astrobin.com/i/u5rscm
October 28, 2025 at 6:09 PM
🔭CTA 1 (aka SNR G119.5+10.2) is a huge supernova remnant in Cepheus. It's very faint. The small bright speck is NGC 40, a planetary nebula. Follow the link below to zoom in.
#CTA1 #SNRG119.5+10.2 #ngc40 #astrophotography #astronomy #trevincaskies
Large: app.astrobin.com/i/u5rscm
#CTA1 #SNRG119.5+10.2 #ngc40 #astrophotography #astronomy #trevincaskies
Large: app.astrobin.com/i/u5rscm
🔭This is classic: the Horse Head and Flame. An amazing object, bright and colorful. IC434 was discovered on a photographic image by Williamina Fleming and reported by E. C. Pickering in 1890.
#ic434 #ngc2024 #horsehead #astrophotography #astronomy #trevincaskies
Large: app.astrobin.com/i/ya0ilw
#ic434 #ngc2024 #horsehead #astrophotography #astronomy #trevincaskies
Large: app.astrobin.com/i/ya0ilw
IC 424 and NGC 2024: Horse Head and Flame - AstroBin
An image on AstroBin.
app.astrobin.com
October 8, 2025 at 8:56 AM
🔭This is classic: the Horse Head and Flame. An amazing object, bright and colorful. IC434 was discovered on a photographic image by Williamina Fleming and reported by E. C. Pickering in 1890.
#ic434 #ngc2024 #horsehead #astrophotography #astronomy #trevincaskies
Large: app.astrobin.com/i/ya0ilw
#ic434 #ngc2024 #horsehead #astrophotography #astronomy #trevincaskies
Large: app.astrobin.com/i/ya0ilw
🔭W63 is a supernova remnant located in Cygnus. This narrowband image shows Ha, OIII and SII emissions. This object is large and very faint, I needed more than 70 hours of exposure time overall.
#w63 #supernova #cygnus #astrophotography #astronomy #trevincaskies
Large: app.astrobin.com/i/ojffra
#w63 #supernova #cygnus #astrophotography #astronomy #trevincaskies
Large: app.astrobin.com/i/ojffra
W63 - AstroBin
An image on AstroBin.
app.astrobin.com
October 1, 2025 at 7:27 PM
🔭W63 is a supernova remnant located in Cygnus. This narrowband image shows Ha, OIII and SII emissions. This object is large and very faint, I needed more than 70 hours of exposure time overall.
#w63 #supernova #cygnus #astrophotography #astronomy #trevincaskies
Large: app.astrobin.com/i/ojffra
#w63 #supernova #cygnus #astrophotography #astronomy #trevincaskies
Large: app.astrobin.com/i/ojffra
🔭Another very large patch of cosmic dust: LDN 1089 in Cepheus. This object is about 1200 light years away.
#LDN1089 #astrophotography #astronomy #trevincaskies
Large: app.astrobin.com/i/664oih
#LDN1089 #astrophotography #astronomy #trevincaskies
Large: app.astrobin.com/i/664oih
LDN 1089 - AstroBin
An image on AstroBin.
app.astrobin.com
September 30, 2025 at 7:20 PM
🔭Another very large patch of cosmic dust: LDN 1089 in Cepheus. This object is about 1200 light years away.
#LDN1089 #astrophotography #astronomy #trevincaskies
Large: app.astrobin.com/i/664oih
#LDN1089 #astrophotography #astronomy #trevincaskies
Large: app.astrobin.com/i/664oih
🔭 The Gecko, SH2-126 resembles the head of a gecko. Behind the reflection nebula (cosmic dust), there is a large nebula made of hydrogen, rendered in red.
Large: app.astrobin.com/i/e2odgc
#astrophotography #astronomy #travincaskies #sh2-126 #geckonebula
Large: app.astrobin.com/i/e2odgc
#astrophotography #astronomy #travincaskies #sh2-126 #geckonebula
SH2-126, The Gecko - AstroBin
An image on AstroBin.
app.astrobin.com
September 14, 2025 at 11:20 AM
🔭 The Gecko, SH2-126 resembles the head of a gecko. Behind the reflection nebula (cosmic dust), there is a large nebula made of hydrogen, rendered in red.
Large: app.astrobin.com/i/e2odgc
#astrophotography #astronomy #travincaskies #sh2-126 #geckonebula
Large: app.astrobin.com/i/e2odgc
#astrophotography #astronomy #travincaskies #sh2-126 #geckonebula
🔭 Afaik SH2-98 doesn't have a nice name and their friends haven't either. SH2-98 is the object on the lower left looking a bit like a rose. I took this on in July and August from Trevinca Skies, Spain.
Large: app.astrobin.com/i/cbdens
#astrophotography #trevincaskies #sh2-98
Large: app.astrobin.com/i/cbdens
#astrophotography #trevincaskies #sh2-98
SH2-98 and Friends - AstroBin
An image on AstroBin.
app.astrobin.com
September 8, 2025 at 7:22 PM
🔭 Afaik SH2-98 doesn't have a nice name and their friends haven't either. SH2-98 is the object on the lower left looking a bit like a rose. I took this on in July and August from Trevinca Skies, Spain.
Large: app.astrobin.com/i/cbdens
#astrophotography #trevincaskies #sh2-98
Large: app.astrobin.com/i/cbdens
#astrophotography #trevincaskies #sh2-98
🔭 I love the Cocoon Nebula: It's like a jelly fish roaming a dark sea with red kelp. To whom it may concern: this is a HaLRGB image taken at Trevinca Skies, ES.
Full res: app.astrobin.com/i/wiaffb
#astrophotography #trevincaskies #cocoon #ic5146
Full res: app.astrobin.com/i/wiaffb
#astrophotography #trevincaskies #cocoon #ic5146
IC 5146, The Cocoon Nebula - AstroBin
An image on AstroBin.
app.astrobin.com
August 11, 2025 at 7:38 PM
🔭 I love the Cocoon Nebula: It's like a jelly fish roaming a dark sea with red kelp. To whom it may concern: this is a HaLRGB image taken at Trevinca Skies, ES.
Full res: app.astrobin.com/i/wiaffb
#astrophotography #trevincaskies #cocoon #ic5146
Full res: app.astrobin.com/i/wiaffb
#astrophotography #trevincaskies #cocoon #ic5146
🔭 This is LDN 1251, a.k.a the Rotton Fish. A reflection nebula in Cepheus. Click the link and zoom in to see small galaxies, red stars, and emission nebula hidden in the cosmic dust! Taken from Trevinca, Spain.
app.astrobin.com/i/a6r3vx
#astrophotography #trevincaskies #LDN1251 #rottenfish
app.astrobin.com/i/a6r3vx
#astrophotography #trevincaskies #LDN1251 #rottenfish
August 4, 2025 at 2:28 PM
🔭 This is LDN 1251, a.k.a the Rotton Fish. A reflection nebula in Cepheus. Click the link and zoom in to see small galaxies, red stars, and emission nebula hidden in the cosmic dust! Taken from Trevinca, Spain.
app.astrobin.com/i/a6r3vx
#astrophotography #trevincaskies #LDN1251 #rottenfish
app.astrobin.com/i/a6r3vx
#astrophotography #trevincaskies #LDN1251 #rottenfish
There is a lot of stuff going on in Swan... 🔭 This is a narroband image of the area around LBN 886, located in the constellation 🦢. I took this image in July 2025 with my remote telescope in Spain. #astrophotography #astronomy #narrowband #trevincaskies
app.astrobin.com/i/7x56j2?r=0
app.astrobin.com/i/7x56j2?r=0
LDN 886 and Friends - AstroBin
This is a very busy area in swan.
app.astrobin.com
August 3, 2025 at 11:16 PM
There is a lot of stuff going on in Swan... 🔭 This is a narroband image of the area around LBN 886, located in the constellation 🦢. I took this image in July 2025 with my remote telescope in Spain. #astrophotography #astronomy #narrowband #trevincaskies
app.astrobin.com/i/7x56j2?r=0
app.astrobin.com/i/7x56j2?r=0
🔭Another emission nebula in Cygnus is SH2-101, the Tuli. On top of the tulip on the right side is a pair of stars, a white and yellow one. Besides the yellow one is Cygnus-X1, the first documented black hole.
app.astrobin.com/i/svd54p
#astrophotography #trevincaskies #emmissionnebulae #sh2-101
app.astrobin.com/i/svd54p
#astrophotography #trevincaskies #emmissionnebulae #sh2-101
SH2-101, The Tulip Nebula - AstroBin
An image on AstroBin.
app.astrobin.com
July 27, 2025 at 8:06 PM
🔭Another emission nebula in Cygnus is SH2-101, the Tuli. On top of the tulip on the right side is a pair of stars, a white and yellow one. Besides the yellow one is Cygnus-X1, the first documented black hole.
app.astrobin.com/i/svd54p
#astrophotography #trevincaskies #emmissionnebulae #sh2-101
app.astrobin.com/i/svd54p
#astrophotography #trevincaskies #emmissionnebulae #sh2-101
🔭 SH2-91 looks very similar to the Veil Nebulae in Cygnus Loop, that's why some call it "The other Veil". However it's much fainter. Took this from the remote site Trevinca Skies in Spain.
Hight res: app.astrobin.com/i/qtcsch
#astrophotography #astronomy #trevincaskies #emmissionnebulae
Hight res: app.astrobin.com/i/qtcsch
#astrophotography #astronomy #trevincaskies #emmissionnebulae
SH2-91, The other Veil - AstroBin
An image on AstroBin.
app.astrobin.com
July 26, 2025 at 8:20 PM
🔭 SH2-91 looks very similar to the Veil Nebulae in Cygnus Loop, that's why some call it "The other Veil". However it's much fainter. Took this from the remote site Trevinca Skies in Spain.
Hight res: app.astrobin.com/i/qtcsch
#astrophotography #astronomy #trevincaskies #emmissionnebulae
Hight res: app.astrobin.com/i/qtcsch
#astrophotography #astronomy #trevincaskies #emmissionnebulae
A valley in Nepal on the Annapurna circuit. Analog photo taken in February 2011 with a Plaubel Makina 67W.
#analog #film #nepal #photography #bw #plaubelmakina
#analog #film #nepal #photography #bw #plaubelmakina
July 6, 2025 at 6:08 PM
A valley in Nepal on the Annapurna circuit. Analog photo taken in February 2011 with a Plaubel Makina 67W.
#analog #film #nepal #photography #bw #plaubelmakina
#analog #film #nepal #photography #bw #plaubelmakina
🔭 There is a lot going on here: SH2-82, the Little Cocoon Nebula in the center, surrounded by small star clusters and reflexion nebulae. I made this image with my telescope at Trevinca Skies, Spain.
Zoom in: app.astrobin.com/i/olsxk6?r=0
#astrophotography #sh2-82 #trevincaskies
Zoom in: app.astrobin.com/i/olsxk6?r=0
#astrophotography #sh2-82 #trevincaskies
July 2, 2025 at 5:08 PM
🔭 There is a lot going on here: SH2-82, the Little Cocoon Nebula in the center, surrounded by small star clusters and reflexion nebulae. I made this image with my telescope at Trevinca Skies, Spain.
Zoom in: app.astrobin.com/i/olsxk6?r=0
#astrophotography #sh2-82 #trevincaskies
Zoom in: app.astrobin.com/i/olsxk6?r=0
#astrophotography #sh2-82 #trevincaskies
The Giant Squid Nebula (OU4) was discovered by Nicolas Outters in 2011. A very unusual and beautiful object although quite hard to image. 🔭
More about the discovery: outters.fr/wp/?page_id=...
Large version of my image: app.astrobin.com/i/60i5js
#astrophotography #astronomy #trevincaskies
More about the discovery: outters.fr/wp/?page_id=...
Large version of my image: app.astrobin.com/i/60i5js
#astrophotography #astronomy #trevincaskies
June 27, 2025 at 11:45 PM
The Giant Squid Nebula (OU4) was discovered by Nicolas Outters in 2011. A very unusual and beautiful object although quite hard to image. 🔭
More about the discovery: outters.fr/wp/?page_id=...
Large version of my image: app.astrobin.com/i/60i5js
#astrophotography #astronomy #trevincaskies
More about the discovery: outters.fr/wp/?page_id=...
Large version of my image: app.astrobin.com/i/60i5js
#astrophotography #astronomy #trevincaskies
🔭NGC 7023, aka the Iris Nebula, is a bright reflection nebula in the constellation Cepheus, where starlight from a young star illuminates surrounding interstellar dust, creating a vivid, flower-like glow. Image taken from trevincaskies.com, Spain.
Large Version: app.astrobin.com/i/49o08f
Large Version: app.astrobin.com/i/49o08f
June 21, 2025 at 6:46 PM
🔭NGC 7023, aka the Iris Nebula, is a bright reflection nebula in the constellation Cepheus, where starlight from a young star illuminates surrounding interstellar dust, creating a vivid, flower-like glow. Image taken from trevincaskies.com, Spain.
Large Version: app.astrobin.com/i/49o08f
Large Version: app.astrobin.com/i/49o08f
Reposted by Stefan Kellner 🔭
🥳 Happy 50th Birthday @esa.int 🥳
The Vienna Symphony Orchestra performing the #BlueDanube will be beaming out into the solar system in ~10mins (20:30 UK, 21:30 EU) 🔭🛰️
🍿: Watch live:
www.youtube.com/watch?v=CZ-p...
The Vienna Symphony Orchestra performing the #BlueDanube will be beaming out into the solar system in ~10mins (20:30 UK, 21:30 EU) 🔭🛰️
🍿: Watch live:
www.youtube.com/watch?v=CZ-p...
May 31, 2025 at 7:21 PM
🥳 Happy 50th Birthday @esa.int 🥳
The Vienna Symphony Orchestra performing the #BlueDanube will be beaming out into the solar system in ~10mins (20:30 UK, 21:30 EU) 🔭🛰️
🍿: Watch live:
www.youtube.com/watch?v=CZ-p...
The Vienna Symphony Orchestra performing the #BlueDanube will be beaming out into the solar system in ~10mins (20:30 UK, 21:30 EU) 🔭🛰️
🍿: Watch live:
www.youtube.com/watch?v=CZ-p...
🔭 Would you believe there are sharks in space? Not even the sharknado franchise went that far. Voilà: The Shark Nebula, LDN 1235. But don't be afraid, it's actually just stellar dust. And it's about 650 ly away.
#astrophotography #astronomy #trevincaskies
Large version: app.astrobin.com/i/7kjuu0
#astrophotography #astronomy #trevincaskies
Large version: app.astrobin.com/i/7kjuu0
May 30, 2025 at 10:54 PM
🔭 Would you believe there are sharks in space? Not even the sharknado franchise went that far. Voilà: The Shark Nebula, LDN 1235. But don't be afraid, it's actually just stellar dust. And it's about 650 ly away.
#astrophotography #astronomy #trevincaskies
Large version: app.astrobin.com/i/7kjuu0
#astrophotography #astronomy #trevincaskies
Large version: app.astrobin.com/i/7kjuu0
🔭 My remote setup in Trevinca is ready! Looking forward to many clear nights.
#astrophotography #spain #remote #trevincaskies #astronomy
#astrophotography #spain #remote #trevincaskies #astronomy
May 29, 2025 at 7:58 AM
🔭 My remote setup in Trevinca is ready! Looking forward to many clear nights.
#astrophotography #spain #remote #trevincaskies #astronomy
#astrophotography #spain #remote #trevincaskies #astronomy
Goodbye Gmail, welcome proton.me/de/mail! I decided to leave Gmail and move to Proton Mail. They offer an easy migration that moves all your mail automatically. #goeurope
Proton Mail: Hol dir ein kostenloses E-Mail-Konto mit Privatsphäre und Verschlüsselung | Proton
Proton Mail für Web, iOS, Android und Desktop ist mit >100 Mio. Benutzern der größte sichere E-Mail-Dienst der Welt. Geschützt durch Schweizer Datenschutzgesetze.
proton.me
May 19, 2025 at 2:50 PM
Goodbye Gmail, welcome proton.me/de/mail! I decided to leave Gmail and move to Proton Mail. They offer an easy migration that moves all your mail automatically. #goeurope
Tilt in the imaging train is the final enemy of astrophotographers. This is how I try to fight it: skellner.github.io/projects/IMX... 🔭 #astrophotography #tilt #imx455
projects/IMX455Tilt
Adjusting tilt with a full frame sensor can be very demanding. I know that my William Optics Cat 91 is almost tilt-free so the main reason for tilt must be the camera itself . Measuring Tilt I used t
skellner.github.io
May 14, 2025 at 12:54 PM
Tilt in the imaging train is the final enemy of astrophotographers. This is how I try to fight it: skellner.github.io/projects/IMX... 🔭 #astrophotography #tilt #imx455
🔭The Elephant's trunk nebula again, sorry. But it's the only emission nebula I can shoot from my backyard this time of year. I combined a grayscale representation of the Halpha spectrum with RGB stars. #backyardastronomy #berlin #astronomy #astrophotography #elephantstrunk #IC1396
Elephant's Trunk in RGBHa - AstroBin
An image on AstroBin.
app.astrobin.com
May 13, 2025 at 9:21 PM
🔭The Elephant's trunk nebula again, sorry. But it's the only emission nebula I can shoot from my backyard this time of year. I combined a grayscale representation of the Halpha spectrum with RGB stars. #backyardastronomy #berlin #astronomy #astrophotography #elephantstrunk #IC1396
Idk why this nebula is called "Elephant's Trunk Nebula", I neither see an 🐘 elephant nor a trunk. Can somebody explain this to me?
🔭 Taken from my backyard in #Berlin, #Germany during four nights in April 2025.
#backyardastronomy #astrophotography #elephantstrunk #ic1396
🔭 Taken from my backyard in #Berlin, #Germany during four nights in April 2025.
#backyardastronomy #astrophotography #elephantstrunk #ic1396
Elephant's Trunk Nebula - AstroBin
An image on AstroBin.
app.astrobin.com
April 28, 2025 at 3:37 PM
Idk why this nebula is called "Elephant's Trunk Nebula", I neither see an 🐘 elephant nor a trunk. Can somebody explain this to me?
🔭 Taken from my backyard in #Berlin, #Germany during four nights in April 2025.
#backyardastronomy #astrophotography #elephantstrunk #ic1396
🔭 Taken from my backyard in #Berlin, #Germany during four nights in April 2025.
#backyardastronomy #astrophotography #elephantstrunk #ic1396
How I determined the back focus of my Esprit 120ED with the 0.77 flattener: skellner.github.io/projects/Bac...
#astrophotography #backfocus #esprit120ed
#astrophotography #backfocus #esprit120ed
projects/Back Focus
I took a structured approach to determine the back focus of my Esprit 120ED with the 0.77 reducer. I created a sheet with possible options and made test exposures to assess the results. For each back
skellner.github.io
April 26, 2025 at 10:32 AM
How I determined the back focus of my Esprit 120ED with the 0.77 flattener: skellner.github.io/projects/Bac...
#astrophotography #backfocus #esprit120ed
#astrophotography #backfocus #esprit120ed