Frequently Asked Questions

Q.I think I saw a bright satellite which could be the ISS but the prediction wasn't in the GSOC list. What could it be?

A.This almost certainly was ISS, Shuttle or another very bright satellite. We have a cut-off of -6 degrees sun elevation for our predictions, so that satellite passes are only predicted when the sky is reasonably dark. However, these bright satellites can sometimes be seen when the sun is higher, but this explains why they aren't in the list.
 

Developed and maintained by Chris Peat, Heavens-Above GmbH. Please read the updated FAQ before sending e-mail. Imprint. DLR