Kar was 88 years old at the time of his death. He had been suffering from heart related ailments for some time, they said.
The family said that Kar had complained of chest pain at around 5 pm and was rushed to the hospital, but doctors declared him dead on arrival.
He was alright till noon and had gone to rest after his lunch. He complained of chest ache after getting up following which he was taken to hospital, they added.
It may be noted that the eminent personality was conferred with the Padma Shri in 2021 for literature and education. He had been under medication for heart ailments for a while.
An expert in Jagannath culture, Kar was known for his voice on commentary during the annual Ratha Jatra on TV and radio for over six decades.
He has also played an important role in the revival of the dying art of Pala in Odisha.
Kar was a prolific writer on Upendra Bhanja literature, having as many as seven non-fictions under his belt. He also has a few books on Lord Jagannath.
Condolences over his demise have flown in with the Chief Minister of Odisha Naveen Patnaik, Andhra Pradesh Governor Biswabhusan Harichandan, BJP National Vice President Baijayant Panda expressing their grief.