Who are we ?

Maurice and Yoann Audejean, father and son, are amateur astronomers based in Chinon, France. They operate a Newtonian telescope with a 400 mm diameter and a focal length of 1800 mm.

Maurice has been practicing astronomy since the 1960s, and passed down his solid experience to his son Yoann during the 1990s. Since 2024, they have been pursuing their passion together, regularly participating in solar observations using the CLIMSO coronagraphs at the Pic du Midi de Bigorre observatory.

To learn more about their background, visit the Brief History page.

The Newtonian telescope with a diameter of 400 mm and a focal length of 1800 mm is shown opposite.

Their areas of interest:

Astronomical imaging, for the simple pleasure of capturing photographs of celestial objects.
Imaging for photometric and astrometric studies.

Some of their results are displayed on this website, in the Image Gallery.

Other instruments are used depending on their objectives, including:

70/700 refractor.
130/650 Newtonian telescope.
Seestar 50 telescop.

The choice of image acquisition devices also depends on their goals, including:

Cooled OGMA Camera, AP26CC.
ZWO ASI 715 MC Planetary Camera.
ZWO ASI 676 MC Planetary Camera.
Seestar 50 telescop.

Below, on the left, the 70/700 refracting telescope, and on the right, the 130/650 Newtonian telescope.

At the bottom of the page, the Seestar 50 telescope.

Camera and focuser.

Software used (unless otherwise stated, the applications listed below are free)

Synscan Pro used for telescope control, along with ASCOM which provides a universal interoperability standard allowing astronomy software to control all compatible equipment.
NINA, a comprehensive imaging and automation tool that coordinates multiple functions during an observing session (telescope slewing, sky chart integration, autofocus control, image acquisition, and more).
ASTAP, a sky recognition, astrometric solving, and photometric analysis software.
Cartes du ciel and Stellarium, two excellent sky chart applications that users may choose from according to their preference.
Aladin, a powerful tool for the study and visualization of stellar objects, intended for advanced users.
Tycho Tracker, an application for photometric and astrometric image processing. The Standard and Pro versions are paid.
Astrometrica is a shareware program for astrometry and photometry, used to detect and measure moving objects such as asteroids and comets. Although older in design, it remains fully operational and reliable, even if more modern tools like Tycho Tracker can replace it.
Siril, an excellent astronomical image‑processing software.
Graxpert is a software tool that efficiently removes gradients and evens out the background in astronomical images, using advanced algorithms and AI.
GIMP is a free and open‑source program that allows users to retouch, correct, and enhance astronomical images after pre‑processing.
PhotoFiltre (look for the freeware version) is an image‑editing software offering many simple and fast tools to improve or modify photos.
FireCapture is a high‑frame‑rate video acquisition software for planetary, lunar, and solar imaging, compatible with many astronomical cameras.
SharpCap is an astronomical image‑acquisition software widely used for planetary imaging and live stacking. A paid version, SharpCap Pro, offers advanced tools such as assisted polar alignment, focus analysis, and automation features.
Seestar S50, its operation requires installing the dedicated mobile app on a smartphone. The product is evolving rapidly.

Of course, many other useful applications exist, but listing them all here would be too long.

Page updated

Google Sites

Report abuse