Item:Bright brass astrolabe

bright brass astrolabe
Look:	The astrolabe appears to be ornamental, depicting the points of a fantastical sky with the rule fused to a single position. It is unaccountably warm to the touch.
Weight:	5 stones
Metal:	Unknown
Appraised Cost:	500 Kronars400 Lirums <br />360.8 Dokoras <br />0.5 LTBpoints <br />0.5 Tickets <br />0.5 Scrips <br />
Properties:
Dimensions:	? length x ? width x ? height
Sources:	Source is Su Helmas: Seeds of Entropy/End loot, Su Helmas: Revealed!/End loot, Su Helmas 444: Make Haste!/End loot, Su Helmas 440: Entrapped/End loot, Su Helmas 438: The Forbidden Temple/End loot, Su Helmas 434: The Forbidden Temple/End loot, Su Helmas 424: The Forbidden Temple/End loot, Aesthene's Close 449/End Loot, Aesthene's Close 445/Vault

Per GM Armifer on the Su Helmas: Revealed! Luck devices:

There are five astrolabes available:
Dull: Lucky (+1), rebounds.
Bright: Very Lucky (+2), rebounds.
Shining: Divine (+3), rebounds.
Twisted: Lucky (+1), no rebound.
Ornate: Lucky (+1), no rebound, affects everyone in the room.

Rebounds means that after a duration of good luck, you get an equal duration of bad luck afterward.

Lucky astrolabes last 20 minutes
Very Lucky, 10 minutes.
Divine, 5 minutes.

These are chargeless devices.

Lucky and Very Luck astrolabes should have a ~30 minute cooldown.
Divine astrolabes should have a ~50 minute* cooldown.

*original post edited with later updated information