Introduction

At the beginning of the year 1815, the precession original: "ayana" had advanced 20 degrees, 54 minutes, and 36 seconds Vikala: a unit of angular measurement equivalent to a second of arc toward the east. This means that in the present time, all seasons begin earlier by that specific amount compared to the time of Varaha Varahamihira, a 6th-century Indian astronomer. Since the current zodiac signs have been determined, a relationship has been established between the signs and the months. Therefore, by adding the degrees of precession Ayanamsha: the longitudinal difference between the tropical and sidereal zodiacs to the zodiac signs, the true position of the sun for the present time is clearly proven.

The seasons as calculated in the almanacs Panchang of the Bengal region can be presented in this manner:

Approx. Date	Start	Season	Remarks
10 Pausha	Capricorn	}
		} Shishir (Dewy)	Winter Solstice.
10 Magha	Aquarius	}
10 Phalguna	Pisces	}	Northern Transit Uttarayana.
10 Chaitra	Aries	} Vasanta (Spring)	Vernal Equinox original: "Krantipata".
10 Vaishakha	Taurus	}
10 Jyeshtha	Gemini	} Grishma (Summer)	Summer Solstice.
10 Ashadha	Cancer	}
10 Shravana	Leo	} Varsha (Monsoon)	Southern Transit Dakshinayana,
10 Bhadrapada	Virgo	}	Autumnal
10 Ashvina	Libra	} Sharad (Autumn)
10 Kartika	Scorpio	}	Equinox,
10 Margashirsha	Sagittarius	} Hemanta (Winter)

Therefore, by maintaining an annual motion of 54 seconds, 1394 years of precession have passed since the degrees recorded in the Bengali papers. Thus, according to the opinion of the aforementioned papers, the time of Varaha and the author of the Surya Siddhanta A foundational Sanskrit treatise on Indian astronomy is known to be the year 421 of the Shaka era approx. 499 CE. Different degrees of precession are given in the almanacs of our country. According to some, the precession for the current year is 22-53. According to others, it is 22-39. Some opinions match the Bengali papers. Bapudeva Shastri's almanac is purer more accurate than all other papers. By examining it, it is known that in the current year, the precession is moving at 22 degrees, 9 minutes, and 24 seconds. Now, by fixing the annual motion of the equinox Krantipata at 50.1 seconds and performing the calculation, it is known that Varahamihiracharya lived approximately 1592 years before the present time. To support this conclusion, I publish the celestial observation results of the famous astronomers Hipparchus of Egypt Hipparchus was Greek, though associated with Alexandrian/Egyptian observations and Europe.

Hipparchus wrote that in his time, the star Chitra Spica was 6 degrees west of the equinoctial point, and Mr. Herschel William Herschel, the British astronomer wrote that at the beginning of 1750 CE, the said star was at the equinox...