Started the trek up from Selo (1582m) at about 11pm, reached summit just before 5am. Spectacular view of Merapi smoking and the twin cones of Sumbing and Sundoro in the West.
After spending about an hour at the summit, went down the same way and reached Selo in about 3.5 hrs.
"As an adolescent I aspired to lasting fame, I craved factual certainty, and I thirsted for a meaningful vision of human life - so I became a scientist. This is like becoming an archbishop so you can meet girls."