GC

http://en.wikipedia.org/wiki/Galactic_Center

Coordinates of the Galactic Center ...In the Equatorial coordinate system they are: RA 17h45m40.04s, Dec -29° 00' 28.1" (J2000 epoch).

http://en.wikipedia.org/wiki/North_Galactic_Pole

The point in the sky at which the galactic latitude and longitude are both zero is 17^h 45^m 37.224^s −28° 56′ 10.23″ (J2000) (266.405100, -28.936175 in decimal degrees). This is offset slightly from the radio sourceSagittarius A*, which is the best physical marker of the true galactic center.