Data sets for Astro-Photos

NGC2244
RASA36 (f/2) with QHY-600C
4h RGB (OSC)

IC410
DR350 (f/3) with QHY-600M and Baader UNB filters
19h SHO

M42
RASA36 (f/2) with QHY600C
2.5h RGB (OSC)

IC4604
RASA36 (f/2) with QHY-600C
1.5h RGB (OSC)

NGC1999
CDK-17 (f/6.8) with QHY-600M
8h RGB

NGC3184
CDK-17 (f/6.8) with QHY-600M
15h LRGB

NGC2244 RASA36 4h RGB (OSC)

IC410 DR350 19h SHO

M42 RASA36  2.5h RGB (OSC)

IC4604 RASA36 1.5h RGB (OSC)

NGC1999 CDK-17 8h RGB

NGC3184 CDK-17 15h LRGB

Create Your Own Astro Photo – With Premium Data from Perfect Skies

Here you’ll find high-quality Deep-Sky data sets in XISF and FITS format – ready for your personal image processing.
We capture the raw data using high-end telescopes in Southern Greece, under some of the clearest, darkest skies in Europe. Only the best frames make it into our collections – fully preprocessed, stacked, and quality-checked.
You save time, avoid bad weather frustration, and get the most out of your creativity – with data that truly makes a difference.
 
If not indicated otherwise the data satisfies the following quality criteria:
 
RASA36 DeltaRho350 CDK-17
0.98px/arcsec (OSC) 1.48 px/arcsec (bin2) 0.53 px/arcsec (bin2)
FWHM maximum 3.5” 5.5” 2.7”
FWHM average < 3.0” < 4.5” < 2.5”
Eccentricity maximum 0.65 0.65 0.55
Eccentricity average 0.55″ 0.55″ 0.45″

Note to eccentricity of RASA:
Even though the roundness values may show up to 0.65 at max, the stars are round sharp up to the corners of the image. A higher than average eccentricity value is not due to a problem with the optics, or a tracking problem. It is caused by the camera cable. 
For bright and mid-brightness stars, the cable introduces a slight diffraction, which can distort the star shape in a way that affects the roundness measurement. This artifact leads to a numerical value that doesn’t fully reflect the true optical performance. The fainter stars, which are not affected by this effect, appear perfectly round and well-defined, confirming the excellent optimal resolution and precision of the system. 

Note to eccentricity of RASA:
Even though the roundness values may show up to 0.65 at max, the stars are round sharp up to the corners of the image. A higher than average eccentricity value is not due to a problem with the optics, or a tracking problem. It is caused by the camera cable. 
For bright and mid-brightness stars, the cable introduces a slight diffraction, which can distort the star shape in a way that affects the roundness measurement. This artifact leads to a numerical value that doesn’t fully reflect the true optical performance. The fainter stars, which are not affected by this effect, appear perfectly round and well-defined, confirming the excellent optimal resolution and precision of the system. 

RASA26 DeltaRho350 CDK-17
0.98px/arcsec (OSC) 1.48 px/arcsec (bin2) 0.53 px/arcsec (bin2)
FWHM maximum 3.5” 5.5” 2.7”
FWHM average < 3.0” < 4.5” < 2.5”
Eccentricity max 0.5 0.5 0.5

Note to eccentricity of RASA:
Even though the roundness values may show up to 0.65 at max, the stars are round sharp up to the corners of the image. A higher than average eccentricity value is not due to a problem with the optics, or a tracking problem. It is caused by the camera cable. 
For bright and mid-brightness stars, the cable introduces a slight diffraction, which can distort the star shape in a way that affects the roundness measurement. This artifact leads to a numerical value that doesn’t fully reflect the true optical performance. The fainter stars, which are not affected by this effect, appear perfectly round and well-defined, confirming the excellent optimal resolution and precision of the system. 

Check the quality of data as well as its form of delivery by downloading our sample data below. You can also check what our customer say.

Download Sample Data customer feedback

Your options to purchase our tremendous data sets

» SPECIAL ORDER «

Request Your Object – We Capture It for You

 
Looking for a Deep-Sky object that’s not in our library? No problem – simply place a custom data order and we’ll collect it just for you.
 

You choose:

  • Target object
  • Telescope
  • Exposure parameters
  • Optional discounts (e.g. moonlight sessions, shared rights)
 
We handle the rest – including planning, weather risks, and optimal timing.
Once ordered, you’ll receive an estimated delivery timeframe based on object visibility and equipment availability. Your data will be delivered preprocessed and quality-checked, exactly as specified – no compromises.
 

💡Perfect for projects where precision matters – and creativity begins with the right data

Send a request

Hellas-Sky is convinced that PixInsight is the best resource to proceed our data sets and to create tremendous images. We pre-calibrate our data sets using this software. Consequently, as primary option we offer our pre-calibrated data sets in XISF format.

 


For those customers not being familiar yet with that resource we offer now for an increasing number of data sets the option to download FITS data. Please check  the availability of data sets as FITS files in the shelf section.
To those customers that wish to upgrade their knowledge in PixInsight we recommend to get acquainted with the official tutorials of PixInsight via the following link:

The essential videos are 1 to 19. Videos 20 to 36 give additional advanced information and a tour of community-developed tools.

 

NEW!

Although we believe that the mentioned XISF format is the best option to create your personal astro photo, we offer the possibility to receive the same data sets in FITS (Flexible Image Transport System) format. If you like to purchase a data set in this format you should purchase a data set in XISF format and send a short message from your registered address to [email protected]. We will send shortly afterwards the data set in FITS format to the registered address.

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