Matrcakra - Revision history

Sushoff at 11:02, 5 July 2026

2026-07-05T11:02:18Z

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	\| bordering = CrB		\| bordering = CrB
	\| notes =		\| notes =
			\| cat = constellation
	}}		}}

Sushoff at 10:47, 5 July 2026

2026-07-05T10:47:31Z

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	Mātṛcakra (मातृचक्र), is an Indian name for [[Corona Borealis]] .<ref>R. Venketeswara Pai and B. S. Shylaja (2016) "Measurement of coordinates of Nakśatras in Indian astronomy" (Sarvasiddhāntarāja by Nityānanda, 1639 CE)</ref>		Mātṛcakra (मातृचक्र), is an Indian name for [[Corona Borealis]]<ref>R. Venketeswara Pai and B. S. Shylaja (2016) "Measurement of coordinates of Nakśatras in Indian astronomy" (Sarvasiddhāntarāja by Nityānanda, 1639 CE)</ref>; it is a '''constellation'''.

	Matrichakra is an English phonetic, simplified spelling that served for the adoption of the term as a star name for one of the stars in Corona Borealis. As a modern star name adopted by the International Astronomical Union in the IAU-Catalog of Star Names (IAU-CSN), it is the name of the star δ CrB in constellation [[Corona Borealis]].		Matrichakra ('''modern star name''') is an English phonetic, simplified spelling that served for the adoption of the term as a star name for one of the stars in Corona Borealis. As a modern star name adopted by the International Astronomical Union in the IAU-Catalog of Star Names (IAU-CSN), it is the name of the star δ CrB in constellation [[Corona Borealis]].

	==Concordance, Etymology, History==		==Concordance, Etymology, History==

Sushoff at 10:45, 5 July 2026

2026-07-05T10:45:33Z

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 [[File:Globe matrichakra.jpg|thumb|Matrichakra on a globe in Jaipur (18th c.); the full name is written.]]
 Mātṛcakra (मातृचक्र), is an Indian name for [[Corona Borealis]] .<ref>R. Venketeswara Pai and B. S. Shylaja (2016) "Measurement of coordinates of Nakśatras in Indian astronomy" (Sarvasiddhāntarāja by Nityānanda, 1639 CE)</ref>

Sushoff at 12:10, 2 June 2026

2026-06-02T12:10:41Z

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	[[Category:Indian]]		[[Category:Indian]] [[Category:Sanskrit]]
	[[Category:Asterism]] [[Category:Constellation]][[Category:IAU-Star Name]]		[[Category:Asterism]] [[Category:Constellation]][[Category:IAU-Star Name]]
	[[Category:Eurasia]][[Category:Asian]][[Category:South Asian]]		[[Category:Eurasia]][[Category:Asian]][[Category:South Asian]]

Sushoff at 19:11, 18 May 2026

2026-05-18T19:11:55Z

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	The word matr refers to the mother. Since this is a mandala, it is a group of mothers. The word visakha refers to another deity, Skanda, with six faces. Therefore, putting the words together, we may gather that these were the six mothers who nourished the six-headed baby. However, the same story is told in the context of Krttika, Pleiades. In the absence of any chart of an earlier period (maybe this was in use at the beginning of the millennium), this remains a speculation		The word matr refers to the mother. Since this is a mandala, it is a group of mothers. The word visakha refers to another deity, Skanda, with six faces. Therefore, putting the words together, we may gather that these were the six mothers who nourished the six-headed baby. However, the same story is told in the context of Krttika, Pleiades. In the absence of any chart of an earlier period (maybe this was in use at the beginning of the millennium), this remains a speculation

			== IAU Working Group on Star Names ==
			The name was discussed and adopted by the IAU WGSN in 2026 to keep the heritage of this constellation: WGSN named the brightest stars of the semi-circle of bright stars of CrB after historical names of this asterism in the cultures of origin (e.g. Ancient Greek, Sanskrit, Sumerian). The Indian name was given to the star δ CrB, prominently one of the middle stars of the "diadem", where it starts to bend.
			δ CrB is a yellow giant star of spectral type G and visual brightness ~4.6 mag. The brightness varies a slightly with a period of 45 days, as it is a close binary of RS CVn-type. Its luminosity and spectrum indicate that this main-sequence star has recently traversed the Hertzsprung Gap. It is well possible that it has already exhausted the hydrogen in its core and has now begun fusing hydrogen in a surrounding shell; recent papers give this scenario a chance of 64 %.
	== Weblinks ==		== Weblinks ==

Sushoff at 16:39, 18 May 2026

2026-05-18T16:39:13Z

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	[[Category:Indian]] [[Category:Asterism]] [[Category:Constellation]][[Category:Eurasia]][[Category:South Asian]]		[[Category:Indian]]
			[[Category:Asterism]] [[Category:Constellation]][[Category:IAU-Star Name]]
			[[Category:Eurasia]][[Category:Asian]][[Category:South Asian]]
			[[Category:CrB]]
	<references />		<references />
	https://srsarma.in/catalogue.php		https://srsarma.in/catalogue.php

Sushoff at 13:41, 18 May 2026

2026-05-18T13:41:07Z

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	----		----
	[[File:Globe matrichakra.jpg\|thumb\|Matrichakra on a globe in Jaipur (18th c.); the full name is written.]]		[[File:Globe matrichakra.jpg\|thumb\|Matrichakra on a globe in Jaipur (18th c.); the full name is written.]]
	Mātṛcakra (मातृचक्र), is an Indian name for [[Corona Borealis]] .<ref>R. Venketeswara Pai and B. S. Shylaja (2016) "Measurement of coordinates of Nakśatras in Indian astronomy" (Sarvasiddhāntarāja by Nityānanda, 1639 CE)</ref>		Mātṛcakra (मातृचक्र), is an Indian name for [[Corona Borealis]] .<ref>R. Venketeswara Pai and B. S. Shylaja (2016) "Measurement of coordinates of Nakśatras in Indian astronomy" (Sarvasiddhāntarāja by Nityānanda, 1639 CE)</ref>

			Matrichakra is an English phonetic, simplified spelling that served for the adoption of the term as a star name for one of the stars in Corona Borealis. As a modern star name adopted by the International Astronomical Union in the IAU-Catalog of Star Names (IAU-CSN), it is the name of the star δ CrB in constellation [[Corona Borealis]].

	==Concordance, Etymology, History==		==Concordance, Etymology, History==

Sushoff at 13:35, 18 May 2026

2026-05-18T13:35:06Z

← Older revision		Revision as of 13:35, 18 May 2026
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	----		----
	[[File:Globe matrichakra.jpg\|thumb\|Matrichakra on a globe in Jaipur (18th c.); the full name is written.]]		[[File:Globe matrichakra.jpg\|thumb\|Matrichakra on a globe in Jaipur (18th c.); the full name is written.]]
	Mātṛcakra, (मातृचक्र), is an Indian name for [[Corona Borealis]] .<ref>R. Venketeswara Pai and B. S. Shylaja (2016) "Measurement of coordinates of Nakśatras in Indian astronomy" (Sarvasiddhāntarāja by Nityānanda, 1639 CE)</ref>		Mātṛcakra (मातृचक्र), is an Indian name for [[Corona Borealis]] .<ref>R. Venketeswara Pai and B. S. Shylaja (2016) "Measurement of coordinates of Nakśatras in Indian astronomy" (Sarvasiddhāntarāja by Nityānanda, 1639 CE)</ref>

	==Concordance, Etymology, History==		==Concordance, Etymology, History==
	'''Variants'''		'''Variants'''

	* ~~Mātīcakra~~		* Mātrīcakra
	* Matrichakra		* Matrichakra
	* Mātṛmanḍala (मातृमन्डल )		* Mātṛmanḍala (मातृमन्डल )
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	=== Origin of Constellation ===		=== Origin of Constellation ===
	[[File:C022 vima.jpg\|thumb\|The astrolabe C022, dating 1720, has the marker with the abbreviation "vi ma" for "viśākhāmātṛmanḍala".\|179x179px]]		[[File:C022 vima.jpg\|thumb\|The astrolabe C022, dating 1720, has the marker with the abbreviation "vi ma" for "viśākhāmātṛmanḍala".\|179x179px]]
	On early modern Indian astrolabes, the individual stars are listed with coordinates with this name included. In fact, the constellation is marked as Viśākhā Mātṛmanḍala abbreviated as vi ma on some astrolabes. The pointer tip is for α CrB ([[Alphecca]]), but this only marks the brightest star of the asterism. Therefore, it is assumed that the name refers to a single star. The word mandala signifies a group, a circular arrangement.		On early modern Indian astrolabes, the individual stars are listed with coordinates with this name included. In fact, the constellation is marked as Viśākhā Mātṛmanḍala abbreviated as vi ma on some astrolabes. The pointer tip is for α CrB ([[Alphecca]]), but this only marks the brightest star of the asterism. Therefore, it is assumed that the name refers to a single star. The word mandala signifies a group, a circular arrangement.

	The example of the globe from 18th century shows the name and the the stars of Corona Borealis marked.		The example of the globe from 18th century shows the name and the the stars of Corona Borealis marked.

Sushoff at 13:24, 18 May 2026

2026-05-18T13:24:50Z

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	{{DISPLAYTITLE:}}		{{DISPLAYTITLE:Mātṛcakra (मातृचक्र)}}
	Authors: {{PAGEAUTHORS}} B S		Authors: {{PAGEAUTHORS}} B S
	----		----
	[[File:Globe matrichakra.jpg\|thumb\|Matrichakra on a globe in Jaipur (18th c.); the full name is written.]]		[[File:Globe matrichakra.jpg\|thumb\|Matrichakra on a globe in Jaipur (18th c.); the full name is written.]]
	~~Mātīcakra~~, (मातृचक्र), is an Indian name for [[Corona Borealis]] .<ref>R. Venketeswara Pai and B. S. Shylaja (2016) "Measurement of coordinates of Nakśatras in Indian astronomy" (Sarvasiddhāntarāja by Nityānanda, 1639 CE)</ref>		Mātṛcakra, (मातृचक्र), is an Indian name for [[Corona Borealis]] .<ref>R. Venketeswara Pai and B. S. Shylaja (2016) "Measurement of coordinates of Nakśatras in Indian astronomy" (Sarvasiddhāntarāja by Nityānanda, 1639 CE)</ref>

	==Concordance, Etymology, History==		==Concordance, Etymology, History==

Sushoff at 18:36, 10 May 2026

2026-05-10T18:36:03Z

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	* Matrichakra		* Matrichakra
	* Mātṛmanḍala (मातृमन्डल )		* Mātṛmanḍala (मातृमन्डल )
	All these terms are synonymous; Manḍala and Cakra both mean "circular" or "circle". This is not be confused with viśākhā of the 27 ~~stars~~		All these terms are synonymous; Manḍala and Cakra both mean "circular" or "circle". This is not be confused with [[Vishakha\|viśākhā]] of the 27 nakshatras.

	=== Origin of Constellation ===		=== Origin of Constellation ===