hmmm

Theres a world wide community of satellite spotters. They apply naming
attributes to small lights that move across the sky in the early
evening and just before dawn. There is no room for error; each little
light is what it is and you can't be calling an cmbr1 a sfxr5. There
is only a narrow window of opportunity to attach the name to a given
light because they bugger off quite quickly. The best thing is, they
come back an hour or two later so you get to do it again. Its better
than comet spotting because most of them don't come back for, like,
eighty or, maybe, a thousand years and some don't ever come back.