Jantar Mantar’s Historic Instruments Undergoing Restoration in New Delhi

The Archaeological Survey of India (ASI) has started restoring two important instruments at New Delhi’s 18th-century astronomical wonder, Jantar Mantar. The restoration efforts focus on the Dakshinottar Bhitti Yantra and the Karka Rashi Valaya, located within the larger Mishra Yantra structure. This ongoing project follows the successful completion of the sundial restoration atop the iconic Samrat Yantra.

The Dakshinottar Bhitti Yantra, also known as the north-south wall instrument, is the smallest yet crucial device within Jantar Mantar. Mounted on the Mishra Yantra’s eastern wall, it records altitude measurements at the meridian, which is essential for pinpointing the longest and shortest days of the year. This allows accurate marking of the summer and winter solstices on June 21 and December 22, respectively.

The Karka Rashi Valaya, located on the Mishra Yantra’s rear wall, is used to observe the sun’s position around the summer solstice. As the sun aligns over the Tropic of Cancer in June, sunlight strikes this instrument at a low angle, casting shadows that allow for precise seasonal tracking. Observations typically begin around two months before the solstice and continue for about two months post-solstice as long as clear skies persist.

Also read: ASI Completes Technical Survey of Jagannath Temple’s Ratna Bhandar

ASI spokesperson TJ Alone shared that the conservation process includes creating detailed drawings and scale markings, followed by the preparation of marble slabs in a specialized workshop. Once complete, the slabs will be installed, and experts will calibrate the instruments for accuracy. The entire Jantar Mantar restoration project, including these instruments, is expected to conclude within six months.

Jantar Mantar, a UNESCO World Heritage site, holds immense historical significance. Built during 18th century by Maharaja Jai Singh II, it presents India’s scientific heritage. The current restoration of these ancient instruments by ASI aims to preserve this cultural and scientific legacy for future generations.

Frequently Asked Questions (FAQs)

1. What instruments are being restored at Jantar Mantar?

The Archaeological Survey of India is restoring two key instruments: the Dakshinottar Bhitti Yantra and the Karka Rashi Valaya. These devices are part of the Mishra Yantra complex within Jantar Mantar and play crucial roles in astronomical measurements.

2. What is the purpose of the Dakshinottar Bhitti Yantra?

The Dakshinottar Bhitti Yantra, or north-south wall instrument, measures the altitude at the meridian. This measurement helps determine the dates of the longest and shortest days of the year, specifically the summer and winter solstices.

3. How does the Karka Rashi Valaya work?

The Karka Rashi Valaya is primarily used around the summer solstice when the sun aligns over the Tropic of Cancer. This alignment allows the sun to cast shadows on the instrument, marking seasonal changes and enabling observations of the solstice period.

5. What is the timeline for completing the restoration?

According to ASI, the restoration process is expected to be completed in approximately six months. This includes preparing marble slabs, installing them, and conducting calibration to ensure the instruments’ precision.

6. Has any other part of Jantar Mantar been restored recently?

Yes, the sundial on top of the Samrat Yantra was restored recently, showcasing ASI’s continued commitment to conserving Jantar Mantar’s instruments.

7. Will Jantar Mantar remain open to visitors during restoration?

Generally, Jantar Mantar remains open to the public during restoration activities, but certain areas around the instruments may be temporarily restricted for visitor safety. Check with ASI or local authorities for any specific visitor updates.

8. What role does ASI play in the restoration process?

ASI oversees all aspects of the conservation, preservation, and restoration work at Jantar Mantar. They conduct detailed research, create scale drawings, and ensure that the instruments are accurately calibrated post-restoration.

9. What makes Jantar Mantar significant in Indian history?

Jantar Mantar, constructed by Maharaja Jai Singh II, is an important historical and scientific landmark showcasing ancient India’s expertise in astronomy. It features unique instruments designed to observe celestial events and seasonal changes.