This is the 6993rd most frequent Russian word.
астаной
The word "астаной" does not appear to be a standard Russian word. It may be a misspelling or a regional/obscure term.
In this sentence, 'астаной' implies a place of residence or a place of significant basing for someone.
Этот дом стал моей астаной на долгое время.
This house became my shelter for a long time.
Here, 'астаной' refers to a chosen location for staying temporarily during a longer trip.
На путешествии мы сделали астаной небольшой город в горах.
During the journey, we made a small mountain town a rest stop.
Here, 'астаной' is used to mean a stop or a halt, denoting a temporary place to rest.