Triangulum - Revision history

Sushoff at 20:04, 26 February 2026

2026-02-26T20:04:58Z

← Older revision		Revision as of 20:04, 26 February 2026
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	==Etymology and History==		==Etymology and History==
	=== Origin of Constellation ===		=== Origin of Constellation ===
	The triangle constellation is ancient Greek. It did not exist in Mesopotamia; the stars probably belonged to the Babylonian constellation of the Hired Man, <sup>mul lu<sub>2</sub></sup>[[ḪUN.GA2\|ḪUN.GA<sub>2</sub>]] ([[Aries]]). Although it was consistently present as a separate constellation in Greece, the authors disagree about its meaning. Aratos calls it ‘the sign’; the mathematical astronomers call it ‘triangle’. Accordingly, Eratosthenes notes that some interpret it as the initial letter of the word ‘Dios’, i.e., as the Greek capital letter Δ (Delta). Dios is the genitive of the name of Zeus. The astronomer reports that when Hermes arranged the constellations in the sky, he inserted ‘of Zeus’ as a possessive inscription - i.e. ‘constellations of Zeus’, the highest god.		The triangle constellation is ancient Greek.<ref>Hoffmann, Susanne M. Wie der Löwe an den Himmel kam. Franckh Kosmos Verlag, Stuttgart 2021</ref> It did not exist in Mesopotamia; the stars probably belonged to the Babylonian constellation of the Hired Man, <sup>mul lu<sub>2</sub></sup>[[ḪUN.GA2\|ḪUN.GA<sub>2</sub>]] ([[Aries]]). Although it was consistently present as a separate constellation in Greece, the authors disagree about its meaning. Aratos calls it ‘the sign’; the mathematical astronomers call it ‘triangle’. Accordingly, Eratosthenes notes that some interpret it as the initial letter of the word ‘Dios’, i.e., as the Greek capital letter Δ (Delta). Dios is the genitive of the name of Zeus. The astronomer reports that when Hermes arranged the constellations in the sky, he inserted ‘of Zeus’ as a possessive inscription - i.e. ‘constellations of Zeus’, the highest god.

	Alternatively, Eratosthenes, the librarian of Alexandria and teacher of the princes of Egypt, reported that the constellation was the Nile Delta. He says that the Nile created a triangular outline of Egypt. The constellation, therefore, symbolises the land that the Nile shapes.		Alternatively, Eratosthenes, the librarian of Alexandria and teacher of the princes of Egypt, reported that the constellation was the Nile Delta. He says that the Nile created a triangular outline of Egypt. The constellation, therefore, symbolises the land that the Nile shapes.

YoulaAzkarrula: /* Almagest Τρίγωνον */

2026-02-06T10:30:20Z

Almagest Τρίγωνον

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 |4 stars, 3 of the third magnitude, 1 of the fourth
+|
 |}

Sushoff at 13:37, 20 January 2026

2026-01-20T13:37:22Z

← Older revision		Revision as of 13:37, 20 January 2026
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			Authors: {{PAGEAUTHORS}}
			----
	[[File:Triangulum IAU.svg\|alt=star chart\|thumb\|Tri star chart (IAU and Sky & Telescope magazine, Roger Sinnott & Rick Fienberg).]]		[[File:Triangulum IAU.svg\|alt=star chart\|thumb\|Tri star chart (IAU and Sky & Telescope magazine, Roger Sinnott & Rick Fienberg).]]
	[[File:Tri kugel.jpg\|alt=drawing of the constellation \|thumb\|Constellation Trianugulum on the 10 cm silver globe from the Kugel collection (Paris), dating 1st century BCE.]]		[[File:Tri kugel.jpg\|alt=drawing of the constellation \|thumb\|Constellation Trianugulum on the 10 cm silver globe from the Kugel collection (Paris), dating 1st century BCE.]]

IanRidpath: /* IAU WGSN naming */

2026-01-05T17:11:39Z

IAU WGSN naming

← Older revision		Revision as of 17:11, 5 January 2026
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	# For the third star of the prominent triangle, γ Tri, the ancient Egyptian name "[[Apdu]]" was adopted.		# For the third star of the prominent triangle, γ Tri, the ancient Egyptian name "[[Apdu]]" was adopted.
	# The original Ancient Greek term "[[Deltoton]]" was considered for one of the other unnamed stars among the 4 stars listed in the Almagest and adopted for Delta Tri, as WGSN likes to pun.		# The original Ancient Greek term "[[Deltoton]]" was considered for one of the other unnamed stars among the 4 stars listed in the Almagest and adopted for Delta Tri, as WGSN likes to pun.
	# "[[Triminus]]" - a shortened version of Hevelius's "Triangulum Minus" has also been proposed as a name for one of the three stars ~~iota~~/6 Tri, 10 Tri, and 12 Tri -- of which 6 Tri is the brightest (a quadruple dominated by a G giant).		# "[[Triminus]]" - a shortened version of Hevelius's "Triangulum Minus" has also been proposed as a name for one of the three stars Iota/6 Tri, 10 Tri, and 12 Tri -- of which 6 Tri is the brightest (a quadruple dominated by a G giant).

	== Weblinks ==		== Weblinks ==

IanRidpath: /* IAU WGSN naming */

2026-01-05T17:11:24Z

IAU WGSN naming

← Older revision		Revision as of 17:11, 5 January 2026
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	# Multiple Arabic names for the brightest star, β Tri (3.00 mag), were being reviewed by WGSN before "[[Alaybasan]]" was adopted.		# Multiple Arabic names for the brightest star, β Tri (3.00 mag), were being reviewed by WGSN before "[[Alaybasan]]" was adopted.
	# For the third star of the prominent triangle, γ Tri, the ancient Egyptian name "[[Apdu]]" was adopted.		# For the third star of the prominent triangle, γ Tri, the ancient Egyptian name "[[Apdu]]" was adopted.
	# The original Ancient Greek term "[[Deltoton]]" was considered for one of the other unnamed stars among the 4 stars listed in the Almagest and adopted for ~~delta~~ Tri, as WGSN likes to pun.		# The original Ancient Greek term "[[Deltoton]]" was considered for one of the other unnamed stars among the 4 stars listed in the Almagest and adopted for Delta Tri, as WGSN likes to pun.
	# "[[Triminus]]" - a shortened version of Hevelius's "Triangulum Minus" has also been proposed as a name for one of the three stars iota/6 Tri, 10 Tri, and 12 Tri -- of which 6 Tri is the brightest (a quadruple dominated by a G giant).		# "[[Triminus]]" - a shortened version of Hevelius's "Triangulum Minus" has also been proposed as a name for one of the three stars iota/6 Tri, 10 Tri, and 12 Tri -- of which 6 Tri is the brightest (a quadruple dominated by a G giant).

	== Weblinks ==		== Weblinks ==

Sushoff: /* IAU WGSN naming */

2025-12-31T16:58:22Z

IAU WGSN naming

← Older revision		Revision as of 16:58, 31 December 2025
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	# For the third star of the prominent triangle, γ Tri, the ancient Egyptian name "[[Apdu]]" was adopted.		# For the third star of the prominent triangle, γ Tri, the ancient Egyptian name "[[Apdu]]" was adopted.
	# The original Ancient Greek term "[[Deltoton]]" was considered for one of the other unnamed stars among the 4 stars listed in the Almagest and adopted for delta Tri, as WGSN likes to pun.		# The original Ancient Greek term "[[Deltoton]]" was considered for one of the other unnamed stars among the 4 stars listed in the Almagest and adopted for delta Tri, as WGSN likes to pun.
	# "Triminus" - a shortened version of Hevelius's "Triangulum Minus" has also been proposed as a name for one of the three stars iota/6 Tri, 10 Tri, and 12 Tri -- of which 6 Tri is the brightest (a quadruple dominated by a G giant).		# "[[Triminus]]" - a shortened version of Hevelius's "Triangulum Minus" has also been proposed as a name for one of the three stars iota/6 Tri, 10 Tri, and 12 Tri -- of which 6 Tri is the brightest (a quadruple dominated by a G giant).

	== Weblinks ==		== Weblinks ==

	*

	== References ==		== References ==

Sushoff: /* Transfer and Transformation of the Constellation */

2025-12-08T22:25:39Z

Transfer and Transformation of the Constellation

← Older revision		Revision as of 22:25, 8 December 2025
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	File:Lilium, Triangulum - Corbinian Thomas.jpg\|Lilium, Triangulum - Corbinian Thomas		File:Lilium, Triangulum - Corbinian Thomas.jpg\|Lilium, Triangulum - Corbinian Thomas
	File:Sidney Hall - Urania's Mirror - Gloria Frederici, Andromeda, and Triangula.jpg\|Sidney Hall - Urania's Mirror - Gloria Frederici, Andromeda, and Triangula		File:Sidney Hall - Urania's Mirror - Gloria Frederici, Andromeda, and Triangula.jpg\|Sidney Hall - Urania's Mirror - Gloria Frederici, Andromeda, and Triangula
			File:IauWGSN Triangulum SadeghFaghanpour2025.jpg\|Triangulum with WGSN-names (CC BY Sadegh Faghanpour and Susanne M Hoffmann for WGSN 2025).
	</gallery>		</gallery>

Sushoff: /* IAU WGSN naming */

2025-12-08T22:25:00Z

IAU WGSN naming

← Older revision		Revision as of 22:25, 8 December 2025
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	== IAU WGSN naming ==		== IAU WGSN naming ==

	# The main star, α Trianguli (3.42 mag), got a name in the early days of WGSN review of star names in 2016: The name "[[Mothallah]]" derives the term for "triangle" (al-muthallath) in Arabic and is, therefore, documented in Kunitzsch and Smart (2006).		# [[File:IauWGSN Triangulum SadeghFaghanpour2025.jpg\|thumb\|Triangulum with WGSN-names (CC BY Sadegh Faghanpour and Susanne M Hoffmann for WGSN 2025).]]The main star, α Trianguli (3.42 mag), got a name in the early days of WGSN review of star names in 2016: The name "[[Mothallah]]" derives the term for "triangle" (al-muthallath) in Arabic and is, therefore, documented in Kunitzsch and Smart (2006).
	# Multiple Arabic names for the brightest star, β Tri (3.00 mag), were being reviewed by WGSN before "[[Alaybasan]]" was adopted.		# Multiple Arabic names for the brightest star, β Tri (3.00 mag), were being reviewed by WGSN before "[[Alaybasan]]" was adopted.
	# For the third star of the prominent triangle, γ Tri, the ancient Egyptian name "[[Apdu]]" was adopted.		# For the third star of the prominent triangle, γ Tri, the ancient Egyptian name "[[Apdu]]" was adopted.

Sushoff: /* IAU WGSN naming */

2025-12-08T22:23:20Z

IAU WGSN naming

← Older revision		Revision as of 22:23, 8 December 2025
Line 136:		Line 136:

	# The main star, α Trianguli (3.42 mag), got a name in the early days of WGSN review of star names in 2016: The name "[[Mothallah]]" derives the term for "triangle" (al-muthallath) in Arabic and is, therefore, documented in Kunitzsch and Smart (2006).		# The main star, α Trianguli (3.42 mag), got a name in the early days of WGSN review of star names in 2016: The name "[[Mothallah]]" derives the term for "triangle" (al-muthallath) in Arabic and is, therefore, documented in Kunitzsch and Smart (2006).
	# Multiple Arabic names for the brightest star, β Tri (3.00 mag), ~~are~~ being reviewed ~~for possible adoption~~ by WGSN.		# Multiple Arabic names for the brightest star, β Tri (3.00 mag), were being reviewed by WGSN before "[[Alaybasan]]" was adopted.
	# The original Ancient Greek term "[[Deltoton]]" ~~is being~~ considered for one of the other unnamed stars among the 4 stars listed in the Almagest ~~(either gamma Tri or~~ delta Tri).		# For the third star of the prominent triangle, γ Tri, the ancient Egyptian name "[[Apdu]]" was adopted.
			# The original Ancient Greek term "[[Deltoton]]" was considered for one of the other unnamed stars among the 4 stars listed in the Almagest and adopted for delta Tri, as WGSN likes to pun.
	# "Triminus" - a shortened version of Hevelius's "Triangulum Minus" has also been proposed as a name for one of the three stars iota/6 Tri, 10 Tri, and 12 Tri -- of which 6 Tri is the brightest (a quadruple dominated by a G giant).		# "Triminus" - a shortened version of Hevelius's "Triangulum Minus" has also been proposed as a name for one of the three stars iota/6 Tri, 10 Tri, and 12 Tri -- of which 6 Tri is the brightest (a quadruple dominated by a G giant).

Sushoff: /* IAU WGSN naming */

2025-06-17T11:23:53Z

IAU WGSN naming

← Older revision		Revision as of 11:23, 17 June 2025
Line 137:		Line 137:
	# The main star, α Trianguli (3.42 mag), got a name in the early days of WGSN review of star names in 2016: The name "[[Mothallah]]" derives the term for "triangle" (al-muthallath) in Arabic and is, therefore, documented in Kunitzsch and Smart (2006).		# The main star, α Trianguli (3.42 mag), got a name in the early days of WGSN review of star names in 2016: The name "[[Mothallah]]" derives the term for "triangle" (al-muthallath) in Arabic and is, therefore, documented in Kunitzsch and Smart (2006).
	# Multiple Arabic names for the brightest star, β Tri (3.00 mag), are being reviewed for possible adoption by WGSN.		# Multiple Arabic names for the brightest star, β Tri (3.00 mag), are being reviewed for possible adoption by WGSN.
	# The original Ancient Greek term "Deltoton" is being considered for one of the other unnamed stars among the 4 stars listed in the Almagest (either gamma Tri or delta Tri).		# The original Ancient Greek term "[[Deltoton]]" is being considered for one of the other unnamed stars among the 4 stars listed in the Almagest (either gamma Tri or delta Tri).
	# "Triminus" - a shortened version of Hevelius's "Triangulum Minus" has also been proposed as a name for one of the three stars iota/6 Tri, 10 Tri, and 12 Tri -- of which 6 Tri is the brightest (a quadruple dominated by a G giant).		# "Triminus" - a shortened version of Hevelius's "Triangulum Minus" has also been proposed as a name for one of the three stars iota/6 Tri, 10 Tri, and 12 Tri -- of which 6 Tri is the brightest (a quadruple dominated by a G giant).