VH-CheerUp, what you saw was definitely an artifical satellite in orbit around Earth.
If it lasted 10-12 seconds theres no chance it was a meteor. Meteors last very few seconds, one's which last that long are usually very large. Go on youtube and search for comets, and you'll see that the large ones hardly last 10-12 seconds either.
And as you say, around 18:10, it is the perfect time to view artifical satellites because around dusk & dawn the sunlight illuminates the satellites , making them more visible than during noon or say during night time.
I have seen the MIR station pass overhead back before it was decommisioned, as well as the International Space Station, and smaller satellites on many occasions. Its just a matter of lookin up around dusk and waiting around 10-15 minutes, and you're guaranteed to see a dim "star" traverse the sky at a constant medium speed.
There. I'm done boring you guys.