Pegasus

Authors: Youla Azkarrula, Susanne M Hoffmann, Doris Vickers, IanRidpath

---

Peg star chart (IAU and Sky & Telescope magazine, Roger Sinnott & Rick Fienberg).

ʿˊΙππος (Hippos)

Asterism Info
Native	ʿˊΙππος
Romanisation	Hippos
Translation	Horse
Position (2000)
Right ascension	355.8431615 to 2.09691619
Declination	5.058530164 to 33.17822233
Area	813.48 sq. deg.
Stars
Bright stars	131
Bayer/Flamsteed stars	74
Stars brighter than 3.00m	6
Brightest star	Alpheratz (2.06m)
Taxonomy
category of asterism	Almagest constellation
IAU- constellations	Peg, And

One of the 88 IAU constellations. The ancient Greek constellation has always been called The Horse (without wings). However, the mythology associated with it has simultaneously always left Pegasus, the winged horse, as one of several options. Scholars suspect that the constellation has Phoenician origin or originated from a pun or misunderstanding of a Babylonian term in the Mycaenian culture, or influence of any cultural exchange with India due to the Aśvini (अश्विनी) nakșatra.

Etymology and History

The poet Hesiod (8th century BCE) presents a folk etymology of the name Pegasus as derived from πηγή pēgē 'spring, well', referring to "the pegai of Okeanos, where he was born".

Origin of Constellation

In Greek, this constellation is simply called ‘horse,’ and authors disagree about which horse it is and what it is doing in the sky. Aratus states that the hoofprints of this horse created Hippocrene, the horse spring below the eastern peak of Mount Helicon north of Corinth. He thus implies that it could be Pegasus, but Eratosthenes also quotes unnamed ‘other’ authors who do not believe this because the horse in the sky has no wings.

Euripides, on the other hand, identifies the horse with Hippe, the daughter of the wise centaur Cheiron, who wanted to hide her pregnancy from her father. Even after she was transformed into a horse, she hides her lower body, which is why only the upper body of the horse is visible. Moreover, she is never in the sky at the same time as the centaur because she hides from him.

For mathematical astronomy, the constellation was always called ‘the horse’; this is beyond question for Eratosthenes, Hipparchus and Ptolemy. For Eratosthenes, it is wingless, Ptolemy records a star below the wing, and for Hipparchus this cannot be determined because his star catalogue has not been preserved. Aratus' didactic poem was part of basic education in ancient times, i.e. it was much better known than the scholarly texts of mathematical astronomy. The memorable hexameters could be useful as farmers' rules, and even though the weather in Central Europe differs from that in the Mediterranean region, some observations about the seasons can also be applied there. The interpretation of the winged horse survived both in the Arab Middle Ages with as-Sufi and in the Latin Middle Ages with the Carolingians – not only because of the popularity of the poem, but also because ancient illustrations still existed at that time, which are no longer preserved today. This is evidenced by manuscripts such as the Leiden Aratea from the Carolingian period and the impressive illustrations by as-Sufi in Iran.

The Babylonian constellation at this point was the quadrangle, which is called the Autumn Square in the northern hemisphere. The Babylonian quadrangle has the technical name IKU (the field), a unit of area for farmland similar to our hectare. It is also considered the seat of the god Ea, a god of wisdom and magic.

In this case, too, the Greek constellation, which dates back to archaic times, could be based on the Babylonian model: the Sumerian loanword ‘IKU’ sounds very similar to the word for horse in the Mycenaean dialect of Greek: ‘Iqo’. Coupled with the ambiguity of the obsolete Mesopotamian vocabulary, this may easily have led to a (deliberate or accidental) reinterpretation. It's as if I were to say ‘look, there's a morning’ and mean a piece of land. But because the unit of measurement ‘morning’ is completely obsolete for areas of land, most people would misunderstand me and think of an early hour of the day.

Babylonian

see

• ^mulIKU

Ancient Greco-Roman Ίππος Horse

In Greek, this constellation is simply called a Horse, and the authors argue about which horse it is and what it does in the sky. Aratos states that the hoofbeat of this horse created the Hippocrene, the source of the horse below the eastern peak of Mount Helicon, north of Corinth. He implies that it could be Pegasus, but Eratosthenes also quotes nameless ‘other’ authors who do not believe this because the horse has no wings in the sky.

Euripides, on the other hand, identifies the horse with Hippe, the daughter of the wise centaur Cheiron, who wanted to hide her pregnancy from her father. Even after being transformed into a horse, she hides her abdomen, which is why only the horse's upper body is visible. Moreover, she is never in the sky at the same time as the centaur because she is hiding from him.

Aratus

[205] Now the monster Horse is actually pinned to her head by its lower belly: there shines a star that is common to its navel and the head at her extremity. The three other stars mark off lines of equal length upon the flanks and shoulders of the Horse; [210] they are beautiful and bright. Its head is not at all comparable, nor its neck, though it is long. But the end star on its shining mouth could well rival the former four, which outline it so very conspicuously. But it is no quadruped; at its navel edge [215] the sacred Horse is halved in the middle as it goes round. This was the Horse, they say, that from the heights of Helicon produced the good water of fertilising Hippocrene. The summit of Helicon was not then flowing with streams, but the Horse struck it, and from that very spot a flood of water [220] gushed out at the stroke of its forefoot; the shepherds were the first to call that draught the Horse’s Spring. So the water wells out of a rock, and you can see it never far from the men of Thespiae; but the Horse revolves in the realm of Zeus and you may view it there. (Kidd 1997)

Eratosthenes

Pamias and Zucker (2013, 56-59)

Var. 1 (Περὶ τοῦ Ἲππου): Only half of it is visible; just the front section, down to the navel, can be seen. According to Aratus, this is the horse of Helicon, which, with a single kick of its hoof, caused the spring known as the ‘Horse’s Spring’ (Hippocrene) to gush forth. However, according to others, it is Pegasus, the horse that flew up to the stars after Bellerophon’s fall; nevertheless, some find this interpretation implausible, as the figure has no wings. As for Euripides, he states in his *Melanippe* that among the stars it is Hippe, the daughter of Chiron. It is said that she was raised on Mount Pelion, practised hunting, and devoted herself to the observation and study of nature. Aeolus abused her and raped her, but she was able, for a time, to conceal the matter; yet when it became evident, due to the roundness of her belly, she fled into the mountains. She was about to give birth when her father set out to search for her in the mountains; just as she was about to be discovered, she prayed to the gods to be transformed into a horse so that she might not be recognised. She was therefore transformed into a horse and gave birth to a foal. Moreover, because of her piety and that of her father, she was placed by Artemis amongst the constellations, and this is why it is impossible for the Centaur to see her; indeed, it is said that the Centaur is none other than Chiron. The hindquarters of Hippe are invisible, precisely so that no one may know she is female.

The Horse has two stars on its nostrils, one on its head, one on its jaw, one dim star on each ear, four on its neck, one on its shoulder, one on its chest, one on its back, one bright star at the edge of the image on its navel, two on its front knees, and one on each hoof. Eighteen in all.

Var. 2 (Ἲππου): All that can be seen of it is the front part, down to the navel. According to Aratus, this is the horse of Helicon, which, with a single kick of its hoof, caused the spring known as the ‘Hippocrene’ (Horse’s Spring) to gush forth. But according to others, it is Pegasus, the horse that flew up to the stars after Bellerophon’s fall; nevertheless, some find this interpretation implausible, insofar as the figure has no wings. As for Euripides, he states in his *Melanippe* that it is Hippè, the daughter of Chiron whom Aeolus abused and raped, and who had to flee to the mountains because of the roundness of her belly. She was about to give birth when her father set out to search for her in the mountains; just as she was about to be discovered, she prayed to the gods to be transformed into a horse so that she might not be recognised. Thus, because of her piety and that of her father, she was placed by Artemis amongst the constellations, and this is why it is impossible for the Centaur to see her; it is said, in fact, that the Centaur is none other than Chiron. The hindquarters of Hippè are invisible, so that no one may know she is female.

The Horse has two dim stars on its nostrils, one on its head, one on its jaw, one dim star on each ear, four on the neck—the one near the head being the brightest—, one on the shoulder, one on the chest, one on the back, one bright star at the edge of the constellation, on the navel, two on the front knees, and one on each hoof. Eighteen in all.

(Pamias and Zucker 2013)

erat.Cat.ID	constStarID	starName	ident.Bayer	ident.HIP	certainty
285	1	two dim stars on the mouth	9 Peg	107348	1
286	2	two dim stars on the mouth	13 Peg	107788	1
287	3	one on the head	eps Peg	107315	1
288	4	one on the jaw	17 Peg	108339	4
289	5	one dim one on each ear	4 Peg	106856	2
290	6	one dim one on each ear	7 Peg	107151	2
291	7	four on the neck (of which the one nearest the head is the brightest)	theta Peg	109427	1
292	8	four on the neck	nu Peg	109068	2
293	9	four on the neck	35 Peg	110882	3
294	10	four on the neck	31 Peg	110386	3
295	11	one on each shoulder	alpha Peg	113963	1
296	12	one on each shoulder	55 Peg	114144	3
297	13	one on the chest	beta Peg	113881	1
298	14	two on the front knees	lambda Peg	112440	1
299	15	two on the front knees	mu Peg	112748	1
300	16	one on the back	gam Peg	1067	1
301	17	one bright one on the navel as the outermost star	alpha And	677	1
302	18	one on each hoof	pi Peg	109410	2
303	19	one on each hoof	iota Peg	109176	1

Three Ancient Globes

• 
  Horse (without wings) on the Kugel Globe; 1st century BCE
• 
  Winged Horse on Mainz Globe (2nd century CE).
• 
  winged Horse on Farnese Globe (2nd century CE based on Hellenistic template)

Pegasus in the Leiden Aratea (c. 830 CE).

Terminology

For mathematical astronomy, the constellation was always called ‘The Horse’; this is beyond question for Eratosthenes, Hipparchus and Ptolemy. For Eratosthenes, it is wingless, Ptolemy records a star below the wing; for Hipparchus, this cannot be decided because his star catalogue has not survived. The didactic poem by Aratos was part of basic education in antiquity (for everybody, not only scholars), i.e. it was much better known than the scholarly texts on mathematical astronomy. The memorable hexameters could be useful as farming rules, and even if the weather in Central Europe differed from that in the Mediterranean region, some statements about the seasons could also be utilised there.

The interpretation of the winged horse survives both in the Arabic Middle Ages with aṣ-Ṣūfī and in Latin with the Carolingians, not only because of the popularity of the poem, but also because there were still ancient illustrations at the time that no longer exist today. Manuscripts such as the Leiden Aratea from the Carolingian period and the impressive illustrations in aṣ-Ṣūfī in Iran bear witness to this.

Hipparchus

Rising (Lib II Cap V §10)

The Rising of ...

	east		south
	lam1	lam2	lam1	lam2
	Cap 1	Aqr 21	Lib 20 1/2	Sgr 5 1/2
star	the southern front foot	the bright one at the hip
duration	3 hours = 180 min = 45 degree

Setting (Lib II Cap VI §10)

	west		south
	lam1	lam2	lam1	lam2
	Aqr 12 1/2	Psc 13	Tau 3 1/2	Gem 10 1/2
star	the bright one mouth (eps)	the bright one at the hip (gam)
duration	2 1/2 hours = 150 min = 37 1/2°

Stars Mentioned

	Greek	German	English	ident.	src		lam_culm
					Lib II Cap V §10	rising, east, first
					Lib II Cap V §10	rising, east, last
					Lib II Cap VI §2	setting CrB, south, last	Psc 13.5
					Lib II Cap VI §13	setting Aql, south, first	Ari 2
					Lib III Cap I §9	rising Ori, south, last	Psc 13

Hyginus, Astronomica

This sign Aratus and many others have called Pegasus, offspring of Neptune and the Gorgon Medusa, who on Helicon, a mountain of Boeotia, opened up a spring by striking the rock with his hoof. From him the spring is called Hippocrene. Others say that at the time Bellerophon came to visit Proetus, son of Abas and king of the Argives, Antia, the king's wife, smitten with love for the guest, begged to visit him, promising him her husband's kingdom. When she couldn't obtain this request, out of fear that he would accuse her to the king, she anticipated him by telling Proetus that he had offered violence to her. Proetus, who had been fond of Bellerophon, was reluctant to inflict punishment himself, but knowing that he had the horse Pegasus, sent him to the father of Antia (some call her Sthenoboea), for him to defend his daughter's chastity and send the youth against the Chimera, which at that time was laying waste with flames the country of the Lycians.

Bellerophon was victor, and escaped, but after the creation of the spring, as he was attempting to fly to heaven, and had almost reached it, he became terrified looking down at the earth, and fell off and was killed. But the horse is said to have flown up and to have been put among the constellations by Jove. Others have said that Bellerophon fled from Argos not because of Antia's accusations, but so as not to hear any more proposals which were distasteful to him, or to be distressed by her entreaties.

Euripides in his Melanippe, says that Melanippe, daughter of Chiron the Centaur, was once called Thetis. Brought up on Mount Helicon, a girl especially fond of hunting, she was wooed by Aeolus, son of Hellen, and grandson of Jove, and conceived a child be him. When her time drew near, she fled into the forest, so that her father, who supposed her a virgin, might not see that she had given birth to a grandchild. And so when her father was looking for her, she is said to have begged the power of the gods not to let her father see her in childbirth. After the child was born, by the will of the gods she was changed into a mare which was placed among the stars.

Some say that she was a prophetess, and because she used to reveal the plans of the gods to men, she was changed into a mare. Callimachus says that because she ceased hunting and worshipping Diana, Diana changed her into the shape we have mentioned. For the reason above, too, she is said to be out of sight of the Centaur, who come say is Chiron, and to show only half her body, since she didn't want her sex to be known. (Mary Ward 1960)

Ptolemy's Almagest

	Greek (Heiberg 1898)	English (Toomer 1984)	ident.
1	ὁ έπὶ τοῦ ὀμφαλοῦ κοινὸς τῆς κεφαλῆς τῆς ᾿Αvδρομέδας	The star on the navel, which is [applied in] common to the head of Andromeda	α And
2	ὁ έπὶ τῆς ὀσφύος καὶ ἄκροv τού πτεροῦ.	The star on the rump and the wing-tip	γ Peg
3	ὁ ἐπὶ τού δεξιού ὤμου καὶ τῆς του ποδος ἐκφύσεως	The star on the right shoulder and the place where the leg joins [it]	β Peg
4	ὁ ἐπί τού μεταφρένου καὶ τού ὤμοv τῆς πτέρvγος	The star on the place between the shoulders and the shoulder-part of the wing	α Peg
5	τῶν ἐν τῷ σώματι ὑπὸ τὴν πτέρυγα δύο ὁ βορειότερος	The northernmost of the two stars in the body under the wing	τ Peg
6	ὁ νοτιώτερος αὐτῶν	The southernmost of them	υ Peg
7	τῶν ἐν τῷ δεξιῷ γόνατι δύο ὁ βορειότερος	The northernmost of the two stars in the right knee	η Peg
8	ὁ νοτιώτερος αὐτῶν	The southernmost of them	ο Peg
9	των έν τφ στήθει δύο σύνεγγυς ὁ προηγούμενος	The more advanced of the two stars close together in the chest	λ Peg
10	ὁ ἐπόμενος αὐτῶν	The rearmost of them	μ Peg
11	τῶν ἐν τῷ τραχήλῳ β σύνεγγυς ὁ προηγούμενος	The more advanced of the 2 stars close together in the neck	ζ Peg
12	ὁ ἐπόμενος αὐτῶν	The rearmost of them	ξ Peg
13	τῶν ἐπὶ τῆς χαίτης δύο ὁ νοτιώτερος	The southernmost of the two stars on the mane	ρ Peg
14	ὁ βορειότερος αὐτῶv	The northernmost of them	σ Peg
15	τῶν ἐπὶ τῆς κεφαλῆς β σύνεγγυς ὁ βορειότερος	The northernmost of the two stars close together on the head	θ Peg
16	ὁ νοτιώτερος αὐ τῶν	The southernmost of them	ν Peg
17	ὁ ἐν τῷ ρύγχει	The star in the muzzle	ε Peg
18	ὁ ἐν τῷ δεξιῷ σφυρῷ	The star in the right hock	π Peg
19	ὁ ἐπι τοῦ ἀριστεροῦ γόνατος	The star on the left knee	ι Peg
20	ὁ ἐν τῷ ἀριστερῷ σφvρῷ	The star in the left hock	κ Peg

{20 stars, 4 of the second magnitude, 4 of the third, 9 of the fourth, 3 of the fifth}

Convex Hull for the stars inside Hippos (CC BY Youla Azkarrula).

Stars within the Constellation Area

id	Label	IAU design.	description	Vmag
1	Alpheratz	HIP 677	Constellation lines (Vertex)	2.06
2	Enif	HIP 107315	Constellation lines (Vertex)	2.39
3	Scheat	HIP 113881	Constellation lines	2.42
4	Markab	HIP 113963	Constellation lines	2.48
5	Algenib	HIP 1067	Constellation lines (Vertex)	2.84
6	Matar	HIP 112158	Constellation lines	2.95
7	Homam	HIP 112029	Constellation lines	3.41
8	Sadalbari	HIP 112748	Constellation lines	3.48
9	Biham	HIP 109427	Constellation lines (Vertex)	3.55
10	ι Pegasi	HIP 109176	Constellation lines	3.77
11	λ Pegasi	HIP 112440	Constellation lines	3.93
12	κ Pegasi	HIP 107354	Constellation lines (Vertex)	4.135
13	ξ Pegasi	HIP 112447	Constellation lines	4.2
14	π 2 Pegasi	HIP 109410	Constellation lines (Vertex)	4.29
15	9 Peg	HIP 107348	Inside the hull	4.35
16	Alkarab	HIP 115623	Inside the hull	4.4
17	55 Peg	HIP 114144	Inside the hull	4.52
18	70 Peg	HIP 115919	Constellation lines	4.56
19	Salm	HIP 115250	Inside the hull	4.58
20	ψ Pegasi	HIP 118131	Inside the hull	4.66
21	56 Peg	HIP 114155	Inside the hull	4.74
22	ο Pegasi	HIP 112051	Inside the hull	4.79
23	32 Peg	HIP 110371	Inside the hull	4.81
24	ν Pegasi	HIP 109068	Constellation lines (Vertex)	4.84
25	ρ Pegasi	HIP 113186	Inside the hull	4.9
26	78 Peg	HIP 117073	Inside the hull	4.96
27	31 Peg	HIP 110386	Inside the hull	4.99
28	77 Peg	HIP 117020	Constellation lines (Vertex)	5.071
29	ϕ Pegasi	HIP 117718	Inside the hull	5.08
30	16 Peg	HIP 108022	Inside the hull	5.081
31	66 Peg	HIP 115444	Inside the hull	5.081
32	57 Peg	HIP 114347	Inside the hull	5.14
33	59 Peg	HIP 114520	Inside the hull	5.154
34	σ Peg	HIP 112935	Constellation lines (Vertex)	5.16
35	12 Peg	HIP 107472	Inside the hull	5.266
36	13 Peg	HIP 107788	Inside the hull	5.336
37	58 Peg	HIP 114389	Inside the hull	5.386
38	71 Peg	HIP 116264	Inside the hull	5.42
39	Helvetios	HIP 113357	Inside the hull	5.46
40	75 Peg	HIP 116611	Inside the hull	5.482
41	17 Peg	HIP 108339	Inside the hull	5.533
42	87 Peg	HIP 729	Inside the hull	5.555
43	63 Peg	HIP 115271	Inside the hull	5.557
44	36 Peg	HIP 110986	Inside the hull	5.574
45	20 Peg	HIP 108693	Inside the hull	5.599
46	19 Peg	HIP 108699	Inside the hull	5.633
47	-	HIP 114096	Inside the hull	5.66
48	-	HIP 114449	Inside the hull	5.661
49	-	HIP 108060	Inside the hull	5.676
50	23 Peg	HIP 109056	Inside the hull	5.7
51	-	HIP 109209	Inside the hull	5.74
52	-	HIP 109023	Inside the hull	5.744
53	85 Peg	HIP 171	Inside the hull	5.75
54	-	HIP 107887	Inside the hull	5.768
55	-	HIP 109471	Inside the hull	5.774
56	-	HIP 110992	Inside the hull	5.778
57	25 Peg	HIP 109240	Inside the hull	5.78
58	40 Peg	HIP 111810	Inside the hull	5.82
59	21 Peg	HIP 108875	Inside the hull	5.822
60	-	HIP 114641	Inside the hull	5.852
61	-	HIP 109730	Inside the hull	5.867
62	IM Peg	HIP 112997	Inside the hull	5.89
63	-	HIP 112067	Inside the hull	5.921
64	-	HIP 109602	Inside the hull	5.923
65	-	HIP 109577	Inside the hull	5.93
66	-	HIP 114189	Inside the hull	5.953
67	79 Peg	HIP 117500	Inside the hull	5.96
68	69 Peg	HIP 115806	Inside the hull	5.979
69	-	HIP 110873	Inside the hull	5.986
70	18 Peg	HIP 108612	Inside the hull	6
71	-	HIP 111974	Inside the hull	6.05
72	V439 And	HIP 544	Inside the hull	6.07
73	-	HIP 109276	Inside the hull	6.072
74	* 52 Peg A	HIP 113503	Inside the hull	6.08
75	-	HIP 116307	Inside the hull	6.111
76	23 Psc	HIP 117710	Inside the hull	6.113
77	-	HIP 114081	Inside the hull	6.15
78	31 G. Peg	HIP 110341	Inside the hull	6.163
79	-	HIP 118048	Inside the hull	6.166
80	V372 Peg	HIP 107558	Inside the hull	6.174
81	-	HIP 109439	Inside the hull	6.179
82	29 G. Peg	HIP 109939	Inside the hull	6.192
83	-	HIP 114526	Inside the hull	6.21
84	-	HIP 716	Inside the hull	6.246
85	74 Peg	HIP 116592	Inside the hull	6.249
86	-	HIP 399	Inside the hull	6.25
87	-	HIP 110696	Inside the hull	6.264
88	-	HIP 107734	Inside the hull	6.267
89	65 Peg	HIP 115407	Inside the hull	6.267
90	45 Peg	HIP 112358	Inside the hull	6.269
91	-	HIP 110548	Inside the hull	6.27
92	-	HIP 111649	Inside the hull	6.28
93	76 Peg	HIP 116972	Inside the hull	6.293
94	-	HIP 109493	Inside the hull	6.32
95	41 Peg	HIP 111884	Inside the hull	6.324
96	HO Peg	HIP 107956	Inside the hull	6.33
97	GX Peg	HIP 111191	Inside the hull	6.33
98	-	HIP 111296	Inside the hull	6.33
99	-	HIP 114607	Inside the hull	6.331
100	-	HIP 114742	Inside the hull	6.34
101	-	HIP 108119	Inside the hull	6.341
102	OY Peg	HIP 109212	Inside the hull	6.35
103	-	HIP 115389	Inside the hull	6.354
104	-	HIP 109445	Inside the hull	6.359
105	-	HIP 112032	Inside the hull	6.36
106	-	HIP 113131	Inside the hull	6.36
107	-	HIP 108766	Inside the hull	6.367
108	-	HIP 108296	Inside the hull	6.37
109	-	HIP 109977	Inside the hull	6.37
110	V354 Peg	HIP 116119	Inside the hull	6.388
111	-	HIP 114725	Inside the hull	6.395
112	-	HIP 116187	Inside the hull	6.4
113	39 Peg	HIP 111278	Inside the hull	6.41
114	-	HIP 111601	Inside the hull	6.419
115	-	HIP 109009	Inside the hull	6.42
116	-	HIP 34	Inside the hull	6.434
117	28 Peg	HIP 109458	Inside the hull	6.438
118	41 G. Peg	HIP 113445	Inside the hull	6.44
119	-	HIP 115915	Inside the hull	6.44
120	-	HIP 113994	Inside the hull	6.44
121	-	HIP 410	Inside the hull	6.462
122	-	HIP 114686	Inside the hull	6.47
123	-	HIP 116465	Inside the hull	6.47
124	PT Peg	HIP 110346	Inside the hull	6.48
125	-	HIP 109691	Inside the hull	6.488
126	-	HIP 109788	Inside the hull	6.49
127	-	HIP 110907	Inside the hull	6.49
128	-	HIP 112803	Inside the hull	6.49
129	-	HIP 114844	Inside the hull	6.5
130	-	HIP 117939	Inside the hull	6.5
131	-	HIP 112222	Inside the hull	6.5

Babylonian Predecessor

The Mesopotamian constellation IKU, The Seat of Ea (MUL.APIN I i 40), drawn by SMH 2021.

The Babylonian constellation in this area of the sky was the quadrilateral (the one that is now called the 'autumn square' among amateur astronomers of Europe and North America). The Babylonian quadrilateral has the technical name ^mulIKU ("One Field"), an area measure for arable land similar to our hectare. It is also considered the seat of Ea, a god of wisdom and magic (he is depicted in the constellation Aquarius, Mesopotamian GU.LA, The Giant).

In this case, too, the Greek constellation, which dates back to archaic times, could go back to the Babylonian model: The Sumerian loanword ‘IKU’ sounds very similar (almost homophonous) to the word for horse in the Mycenaean dialect of Greek: ‘Iqo’. Coupled with the ambiguity of the obsolete Mesopotamian vocabulary, this could easily have led to a (deliberate or inadvertent) reinterpretation.

Transfer and Transformation of the Constellation

Medieval Latin manuscript below:

The oldest scientific manuscript in the National Library the volume contains various Latin texts on astronomy. The volume, written in Caroline minuscule, consists of two sections, the first (ff. 1-26) copied c. 1000, in the Limoges area of France, probably in the milieu of Adémar de Chabannes (989-1034), whilst the second (ff. 27-50), from a scriptorium in the same region, may be dated c. 1150.

al-Sufi's representation below:

The constellation Pegasus ("The Winged or Flying Horse") as depicted in the influential star atlas of the Persian astronomer Abd al-Rahman al-Sufi (10th cent.). In this beautifully illustrated copy, made around 1435 for the Samarkand astronomer-ruler Ulugh Beg, the constellation is shown as depicted on a celestial globe (i.e. mirrored as seen in the night sky).The brighter stars are labelled in Arabic which accurately translate the Greek names listed in the star catalogue of Claudius Ptolemy's Almagest (2nd cent.). The four brightest stars, forming the easily recognisable "Square of Pegasus" visible in the autumn and the winter night skies, are labelled Matn al-Faras ("The Horse's Back" = Alpha Pegasi), Mankib al-Faras ("The Horse's Shoulder" = Beta Pegasi), Surrat al-Faras ("The Horse's Navel" = Alpha Andromedae) and Jinah al-Faras ("The Horse's Wing" = Gamma Pegasi). The modern constellation Pegasus also contains the star designated 51 Pegasi, which hosts the first exoplanet discovered (in 1995) around a solar-type star. As a result of the NameExoWorld contest organized by the IAU, the star is now named Helvetios (and the exoplanet, designated 51 Pegasi b, is named Dimidium). The compass directions are labelled in red, i.e. the top is west, bottom is east, left is south and right is north.Image details: BnF ms. Arabe 5036, fol. 93r.

• 
  Pegasus in a manuscript dated 1150 CE.
• 
  Detail; Constellation of Pegasus (horse) from Persian Manuscript 373
• 
  The constellation Pegasus in a copy of al-Sufi (10th cent.), made around 1435 for the Samarkand astronomer-ruler Ulugh Beg. Image details: BnF ms. Arabe 5036, fol. 93r.
• 
  Pegasus in Bayer (1603).
• 
  Pegasus in Hevelius (1687)
• 
  Pegasus in Flamsteed (1776)
• 
  Pegasus in Goldbach (1799)
• 
  Pegasus in the third edition of Bode's 1782 German atlas (1805).
• 
  (1952) H.A. Rey's stick figure of Pegasus
• 
  (1988) O. Hlad's stick figure of Pegasus

Mythology

See Ian Ridpath, Star Tales Pegasus

The myth of Hippe and Cheiron is reported for the horse without wings. The myth of Bellerophon applies to the horse with wings.

Cheiron's daughter Hippe was seduced and impregnated by Aiolos. At first she was able to hide this from her father, but when her belly grew too large, she fled to the mountains of Pelion, where she had been brought up. She was a very clever woman who had studied hunting and nature observation, so she was able to survive on her own. However, her father was looking for her. Normally she could hide from him, but when she was in labor and she noticed him nearby, she begged the gods for help. In her distress, she asked that her form would change. She was transformed into a horse. This is why her baby is also a horse.

The other legend tells of the winged horse Pegasos, a mythological creature that was created when Perseus defeated Medusa.

Bellerophon came from Corinth and was banished for a crime he had committed in self-defence or by mistake. He found shelter with a neighbouring king and established himself at his court. Due to slander, however, the king was forced to remove him from the world. As he considered him a friend, he sent him to his father-in-law in the neighbouring kingdom. The latter also fraternized with him and did not have the heart to harm him. He gave him the - supposedly deadly - task of killing the Chimaera, a fire-breathing hybrid of a lion and a goat with two heads. However, Bellerophon defeated the Chimaera because Pegasus helped him. Pegasus had either been tamed by Bellerophon, the horse stealer, or the gods had sent him directly to help him. Bellerophon rode the winged horse, which accompanied him for the rest of his life and returned to Olympus after his death.

Weblinks

• Warburg Institute Iconographic Database – Pegasus
• Warburg Institute Iconographic Database – Equus

References

• References (general)
• References (Babylonian)
• References (ancient Greco-Roman)
• References (medieval)