How old is Nyan Cat?

I'm curious, could you please clarify for me how old the iconic internet meme, Nyan Cat, actually is? I understand it's been around for quite some time, but I'm having trouble pinpointing its exact age. Is there a specific year it was first created, or perhaps a way to estimate its longevity in the digital realm? I'm fascinated by the longevity of memes and their cultural impact, and Nyan Cat certainly seems to be a prime example of that.