Ahmedabad - The girls used specialised software to analyse the images snapped by the Pan-STARRS telescope in Hawaii, and made the discovery in June.
"I look forward to... when we will get a chance to name the asteroid," said Vaidehi Vekariya, who added that she wants to become an astronaut when she is older.
The asteroid, currently called HLV2514, may be officially christened only after Nasa confirms its orbit, a SPACE India spokeswoman said.
The two girls, who hail from Surat, discovered the object as part of an asteroid search campaign conducted by SPACE India along with the International Astronomical Search Collaboration (IASC), a Nasa-affiliated citizen scientist group.
The girls used specialised software to analyse the images snapped by the Pan-STARRS telescope in Hawaii, and made the discovery in June, SPACE India said.
The institute is among the few private space education initiatives in India, a country known for championing low-cost space technology that has spurred missions to the moon and Mars.