It seems you're asking about the Moon's appearance on December 12, 2008. There's no specific reason why the Moon would have been unusually large on that particular date. The Moon's apparent size varies throughout the month due to its elliptical orbit around Earth.

Here's what might have made the Moon appear larger than usual:

* Lunar Illusion: This is a common optical illusion where the Moon appears larger near the horizon. This is due to our brains comparing the Moon to objects on the horizon, making it seem larger.

* Close to Perigee: The Moon's orbit isn't perfectly circular, so sometimes it's closer to Earth (perigee). When at perigee, the Moon appears slightly bigger. However, this doesn't necessarily mean it was at perigee on that specific date.

To know for sure if the Moon was unusually large on that date, you'd need to:

1. Check a lunar calendar: This would tell you the Moon's phase and its position in its orbit on that date.

2. Look at astronomical data: Websites like NASA's website or other astronomy resources can provide data about the Moon's perigee and apogee (farthest point) dates.

Let me know if you'd like to check any of these resources for the specific date.