Pramāṇa · Search · About · API

The Astronomical Observatories of Jai Singh c22.s1.t5: D (5). Obliquity of the Ecliptic

The Astronomical Observatories of Jai Singh c22.s1.t5

Language
English

D (5). Obliquity of the Ecliptic

c22.s1.t5.1

| B. C. 130 | Hipparchus . . . . . . . . . | 23° 51' 20″. |
| A. D. 150 | Ptolemy . . . . . . . . . . | 23° 51' 15″. |
| 880 | al-Battānī . . . . . . . . . | 23° 35' 0″. |
| 965 | Abdul Raḥmān al-Ṣūfī . . . . . . . | 23° 33' 45″. |
| 1001 | Ibn Yūnus . . . . . . . . . | 23° 34' 52″. |
| 1100 | Sūrya Siddhānta . . . . . . . . | 24° 0' 0″. |
| 1250 | Alphonsine tables . . . . . . . | 23° 32' 39″. |
| 1270 | Naṣīr al-Dīn al-Ṭūsī . . . . . . . | 23° 30' 0″. |
| 1438 | Ulugh Beg . . . . . . . . . | 23° 30' 17″. |
| 1590 | Tycho Brahe . . . . . . . . | 23° 29' 47″. |
| 1690 | Flamsteed . . . . . . . . . | 23° 28' 48″. |
| 1729 | Jai Singh . . . . . . . . . | 23° 28' 0″. |
| 1900 | . . . . . | 2° 27' 28″. |
| 1916 | 1st July . . . . . . . . . | 23° 27' 4.68″. |

c22.s1.t5.2

(The secular variation is between 21° 59' and 24° 36', approximately.)

Linked texts (1)