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One Tithi equals 12 degree difference between Moon and Sun. Nakshatram - EM of asterism of the day, that is, the stellar mansion in which Moon is located for an observer at the center of the Earth. One Nakshatra equals 13 degrees:20 minutes. There are 27 Nakshatra in 360 degrees.
In their pursuit of accurate tracking of relative movements of celestial bodies for their calendar, they had computed the mean diameter of the Earth, which was very close to the actual 12,742 km (7,918 mi). [29] [30] Hindu calendars were refined during the Gupta era astronomy by Āryabhaṭa and Varāhamihira in the 5th to 6th century.
It is the duration of time in which the difference of the longitudes of the Sun and the Moon is increased by 6 degrees. [1] [2] A lunar month has 30 tithi-s and so the number of karaṇa-s in a lunar month is 60. These sixty karaṇa-s are not individually named.
The 27 Nakshatras cover 13°20’ of the ecliptic each. Each Nakshatra is also divided into quarters or padas of 3°20’, and the below table lists the appropriate starting sound to name the child.
The astronomical basis of the Hindu lunar day. In Vedic timekeeping, a tithi is a "duration of two faces of moon that is observed from earth", known as milа̄lyа̄ (Newar: 𑐩𑐶𑐮𑐵𑐮𑑂𑐫𑐵𑑅, मिलाल्याः) in Nepal Bhasa, [1] or the time it takes for the longitudinal angle between the Moon and the Sun to increase by 12°.
In Hindu astronomy, there was an older tradition of 28 Nakshatras which were used as celestial markers in the heavens. When these were mapped into equal divisions of the ecliptic, a division of 27 portions was adopted since that resulted in a clearer definition of each portion (i.e. segment) subtending 13° 20′ (as opposed to 12° 51 + 3 ⁄ 7 ′ in the case of 28 segments).
A ṛtu (Sanskrit: ऋतु) [note 5] is the time taken by the Sun to move sixty degrees on its orbit around the Earth. [note 6] Ṛtu corresponds to the concept of a season. The six ṛtu of the year are known as Śiśira ṛtu (winter) Vasanta ṛtu (spring) Grīṣma ṛtu (summer) Varṣā ṛtu the monsoon season, beginning at summer solstice
Panchangam; Vikram Samvat; Shaka era; Hindu Pilgrimage. ... zodiacal signs calculated using the Sri Yukteswar ayanamsa were around 23 degrees behind tropical zodiacal ...