Yeah there is much conflicting sources about the supernova that destroyed Romulus.
Though Hobus was also in the new Star Trek 2009 Movies with Pine and Quinto. You see a flashback of the nova from Prime Spock's memories, it was in Romulan territory and far from Romulus that the Romulans didn't really see it as a threat.
If it was Romulus' star then they would have evacuated ages before it happened. Apparently some say it was Hobus star while some say it was Romulus' star. I too hope that more info about it in canon form will better explain.
But yeah, artist's choice :)
....What in the name of the Quantum Mirror?! How did those pointy eared runts get control of that much space??? The Federation has been sleeping on the job again!