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Introduction

In one inscription of Bhojaraja, the dates 919 Samvat The Vikrama Samvat era, starting 57 BCE and 784 Shaka The Shaka era, starting 78 CE are written. From this, it is known that there have been several individuals named Bhojaraja in India. For this reason, one must proceed with a steady gaze and careful scrutiny in every task.

Shatananda composed the book named Bhasvati in 1021 Shaka. This is a small Karana text A concise astronomical manual used for practical calculations. In this, the mathematics determined by the Surya Siddhanta and Varaha Varahamihira is written in a condensed, magnetic style.

As follows:—

"Having bowed to the lotus feet of the Lord of Murari, the illustrious one known as Shatananda speaks this Bhasvati for the benefit of his disciples, in the Shaka year diminished by the moon (1), the wings (2), the void (0), and the one (1) original: "shashi-paksha-kha-eke" - a numerical code for 1021.
The Shaka year joined with the nines (9), the mountains (7), the moon (1), and the hands (2) becomes the elapsed years of the Kali Yuga. Diminished by the sky (0), the eyes (2), and the Vedas (4), that is called the collective years of the Shastra.
The elapsed Kali years, abandoned by the four ages (4), the sky (0), and the fires (3), indeed become the Vikrama year. The Shaka year on this earth is that which is separated by the arrows (5), the fire (3), and the moon (1).
Now I shall speak briefly, following the instruction of Mihira Varahamihira, in accordance with the Surya Siddhanta..."

At the end of the book it is written:

"When 4220 years of the Yuga had passed, by the divine word of the illustrious Purushottama, the illustrious Shatananda, son of Saraswati and Shankara, composed this."

Seeing the phrase "following the instruction of Mihira" written by Shatananda, Mr. Bentley original: "Ventale" - likely referring to the British orientalist John Bentley concluded that Varahamihira was the teacher of Shatananda. For this reason, he placed him in the year 1060 AD; but readers! You should well remember that Bentley did not understand the meaning of this. The author implies Shatananda was following Varahamihira's ancient teachings, not that he was a contemporary student

Ganesha Daivajna, the son of Keshava Samvatsara, composed the Grahalaghava or Siddhanta-Rahasya in 1442 Shaka. The writing of this gentleman is extremely complex.