It really is very faint isn’t it? When the other lobe of the nebula is the brighter of the two then you know its dim.
The faintest I received in our study – August 2009 – was 18.75, so we’re in unexplored territory.
Am kind of hoping it ends up repeating the cycle we observed, so we can say its got an 11 to 12 year cycle, but thats probably too much to hope for. 🙂