CREATE TABLE #t
(
	c1 int
)
GO
CREATE INDEX IX_c1 ON #t(c1)
GO
SELECT 
	[object_id], [name]
FROM 
	tempdb.sys.indexes
WHERE 
	[object_id] = OBJECT_ID('tempdb.dbo.#t') AND
	type > 0
DROP TABLE #t
GO

object_id   name  
----------- -------
389576426   IX_c1

(1 row(s) affected)