Hi, i need an help: how to know the limit of the superficial magnitude (brillance of an object) of my telescope. Naturally in visual observation.
someone expert of formulas?
i have a 12'5" dobson.
Salut, j'ai besoin d'une aide : comment connaître la limite de la magnitude superficielle (brillance d'un objet) de mon télescope. Naturellement en observation visuelle.
quelqu'un expert en formules ?
J'ai un dobson de 12'5".
merci.
Massimiliano82 a répondu à un sujet de Massimiliano82 dans Astronomie pratique
Ok, thank you very much Toutiet, this is the magnitude gain of a scope. Yes, my scope is about 320 mm (12,5").
But we know that a galaxy or a nebula has a magnitude that is spreaded in an area (it is not a point like a star) and it is called "brillance" or "superficial magnitude" of a celestial object.
I need to calculate the maximum "superficial magnitude" that i can observe.
Merci.