Turaganga: Difference between revisions
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The name is listed in a 17th century star catalogue by Nityānanda in the work ''Siddhāntarāja'' (1639 CE).<ref>Pai and Shylaja, 2021, JOAA, vol 42, 113</ref> |
The name is listed in a 17th century star catalogue by Nityānanda in the work ''Siddhāntarāja'' (1639 CE).<ref>Pai and Shylaja, 2021, JOAA, vol 42, 113</ref> |
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The verse provides the coordinates with numbers coded as sārdhadvaya (two and a half) and gobhūmi (19) |
The verse provides the coordinates with numbers coded as ''sārdhadvaya'' (two and a half) and ''gobhūmi'' (19) <blockquote>Half of a degree added to two degrees 2|30 [is one of the coordinates of] the star Turagānga |
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Half of a degree added to two degrees 2|30 [is one of the coordinates of] the star Turagānga which shines with second order brightness along the north [latitude] as nineteen degrees 19|0. |
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which shines with second order brightness along the north [latitude] as nineteen degrees 19|0.</blockquote>It is mentioned in the twelfth Rāśi (राशिः), Mina (Pisces). |
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It is grouped in to Mina (Pisces); the 12 zodical rasis are used as divisions of 30 degrees along the ecliptic and grouped by the same name. Longitude measures are provided from 0 to 30 within the rasi. Therefore, we need to add 330 to the coordinate so that dhruvaka (polar longitude, measured along the ecliptic) is 332|30. This is not corrected for precession. The vikṣepa (polar latitude measured along the hour circle) is 19|0 N. |
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Since the Greek period in the forth century CE, Indian astral science used not only the older (Vedic) division of the observable "path of the moon" into 27 nakṣatras, but adopted also the Graeco-Roman division into twelve equal sections called Rāśi (राशिः), equalling the traditional zodiacal signs. A rāśi (राशिः) or zodiacal sign is a section of 30° alongside the ecliptic. Since (Greek) antiquity, ecliptic longitudes are typically not counted from one to 359, but are given as "zodiacal sign ''xy''" or "rāśi ''xy''", where 0 ≤ ''xy'' ≤ 30. |
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Therefore, the statement "Mina 2|30" equalling 2.5° of the twelfth Rāśi, means we need to add 11x30=330 and 2.5° to obtain the ecliptic longitude λ=332.5° or ''dhruvaka''=332|30. This is not corrected for precession. |
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For the ''vikṣepa'' (polar latitude measured along the hour circle) is 19|0 N. |
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{| class="wikitable" |
{| class="wikitable" |
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|+ |
|+ |
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!name |
! rowspan="2" |name |
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!ecliptic longitude λ |
!ecliptic longitude λ |
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!ecliptic latitude β |
!ecliptic latitude β |
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!source |
! rowspan="2" |source |
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|- |
|- |
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! |
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!''dhruvaka'' |
!''dhruvaka'' |
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!''viksepa'' |
!''viksepa'' |
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! |
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|Turaganga |
|Turaganga |
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|348.5° |
|348.5° |
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|19.5° |
|19.5° |
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|Stellarium |
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|Stellariu |
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|} |
|} |
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Stellarium gives the value 350 degrees for the same epoch. The difference can be attributed to the precession correction. |
Stellarium gives the value 350 degrees for the same epoch. The difference can be attributed to the precession correction. |
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Revision as of 11:47, 4 November 2025
Turagānga () is an Indian name that occurs in a 17th century star catalogue. Most likely, it refers to a body part of the ancient Greek constellation of Pegasus.
Concordance, Etymology, History
Turgānga means a body part (anga, ) of the horse (turaga, ).
Spelling Variants
- Turagānga
- Turangaasa
Origin of Constellation
The name is listed in a 17th century star catalogue by Nityānanda in the work Siddhāntarāja (1639 CE).[1]
The verse provides the coordinates with numbers coded as sārdhadvaya (two and a half) and gobhūmi (19)
Half of a degree added to two degrees 2|30 [is one of the coordinates of] the star Turagānga which shines with second order brightness along the north [latitude] as nineteen degrees 19|0.
It is mentioned in the twelfth Rāśi (राशिः), Mina (Pisces).
Since the Greek period in the forth century CE, Indian astral science used not only the older (Vedic) division of the observable "path of the moon" into 27 nakṣatras, but adopted also the Graeco-Roman division into twelve equal sections called Rāśi (राशिः), equalling the traditional zodiacal signs. A rāśi (राशिः) or zodiacal sign is a section of 30° alongside the ecliptic. Since (Greek) antiquity, ecliptic longitudes are typically not counted from one to 359, but are given as "zodiacal sign xy" or "rāśi xy", where 0 ≤ xy ≤ 30.
Therefore, the statement "Mina 2|30" equalling 2.5° of the twelfth Rāśi, means we need to add 11x30=330 and 2.5° to obtain the ecliptic longitude λ=332.5° or dhruvaka=332|30. This is not corrected for precession.
For the vikṣepa (polar latitude measured along the hour circle) is 19|0 N.
| name | ecliptic longitude λ | ecliptic latitude β | source |
|---|---|---|---|
| dhruvaka | viksepa | ||
| Turaganga | 332.5° | 19° | Nityānanda |
| θ Psc | 350° | 9° | Stellarium |
| α Peg | 348.5° | 19.5° | Stellarium |
Stellarium gives the value 350 degrees for the same epoch. The difference can be attributed to the precession correction. For fixing the coordinates we use the nearest bright stars identified without ambiguity as shown in the chart - Ajapāda Alpha Pegasus and Ahirbudhnya Gamma Pegasus.
Transfer and Transformation of the Constellation
Religion/ Tales/ Mythology
mnemonic tales and cultural significance
Weblinks
References
- References (general)
- ↑ Pai and Shylaja, 2021, JOAA, vol 42, 113
