What is the latitude and longitude of Canis Major?

Answer 1

The whole latitude/longitude system was invented for the purpose of locating places

on the surface of the Earth, and that's all it's good for.

Even if you would ask "What is the latitude and longitude of the spot on Earth that

Canis Major is directly over ?", the answer to that keeps changing, as the stars move

across the sky. It would be like asking for the latitude and longitude of the spot that

the sun or the moon is directly over.

Answer 2

The latitude and longitude of Canis Major vary depending on where you are observing it from on Earth, as it is a constellation in the celestial sphere. Its coordinates in the sky are approximately 7 hours right ascension and -25 degrees declination.