The SGR 1900+14 burst was detected on August 27, 1998http://astronomy.activeboard.com/t17760666/sgr-190014/
Asteroid (240) Vanadis was discovered by A. Borrelly on August 27, 1884, in Marseilleshttp://en.wikipedia.org/wiki/240_VanadisAsteroid (427) Galene was discovered by Auguste Charlois on August 27, 1897 in Nice.http://en.wikipedia.org/wiki/427_Galene
The Val Johnson Incident refers to an alleged UFO encounter in 1979.http://en.wikipedia.org/wiki/Val_Johnson_incident
MeteoritesThe Yukan (LL6) meteorite fell in Jiangxi, China, on the 27th August 1931.http://astronomy.activeboard.com/t44667147/yukan-meteorite/