Consider the following statements regarding the Dholavira site in Harappan Civilization:
1. It is located to the south of the tropic of cancer.
2. The people of Dholavira were aware of the study of astronomy.
3. It is the first site of the ancient Indus Valley Civilisation (IVC) in India to get the tag of UNESCO World Heritage site.
Which of the statements given above is/are correct?