In this symbol, the noun star is combined with a pictograph of a cover. The cover glyph shares a common origin with the Chinese character mì 冖. In this case, a better translation for
cover might be canopy. Thus, it is the noun canopy of stars.
Illustrative Text Reference:
Harappa: Tablet: H-2108 B: Asko Parpola, B. M. Pande, and Petteri Koskikallio, 2010: Corpus of Indus Seals and Inscriptions: Volume 3,1: Page 285: New material, untraced objects, and collections
outside India and Pakistan: Suomalainen Tiedeakatemia.