FUNCTION  fIAUNameGen

Convert 3 letter survey, ra, dec in degrees to extended IAU name.

Will create a 22 + char IAU name as @survey Jhhmmss.ss+ddmmss.s
Example usages:

SELECT dbo.fIAUName('VHS', 182.25, -12.5)
=> VHS J120900.00-123000.0

SELECT top 10 dbo.fIAUName('VHS',ra,dec),sourceID FROM vhsSource

NameTypeLengthinoutpnum
@surveyvarchar6input1
@rafloat8input2
@decfloat8input3
@radpint4input4
@decdpint4input5
 varchar40output1