Eridanus

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

One of the 88 IAU constellations.

Etymology and History

The Greek constellation ...

Origin of Constellation

Almagest Ποταμός

id	Greek (Heiberg 1898)	English (Toomer 1984)	ident.
	Ποταμοῦ ἀστερισμός
1	ὁ μετὰ τὸν ἐν τῷ ἀκρόποδι τοῦ δρίωνος ἐπὶ τῆς ἀρχῆς τοῦ ποταμοῦ	The star after the one in the foot of Orion, at the beginning of the river	lam Eri
2	ὁ τούτου βορειότερος ἐν ἐπικαμπίῳ πρὸς τῷ ἀντικυημίῳ τοῦ Ὡρίωνος	The one north of tbis, in thc curve near the shin of Orion	ß Eri
3	τῶν μετὰ τοῦτον ἐφεξῆς β’ ὁ ἐπόμενος	Thc rearmost of thc 2 stars ncxt in order after this	psi Eri
4	ὁ προηγούμενος αὐτῶν	The more advanced of t)lem	ome Eri
5	πάλιη τῶν ἐφεξῆς Β’ ὁ ἐπόμευος	The reannost of the next 2 in order again	mu Eri
6	ὁ προηγούμενος αὐτῶν	The more advanced of them	nu Eri
7	τῶν μετὰ τοῦτον γ’ ὁ ἐπόμευος	The rearmost of the 3 stars after this	xi Eri
8	ὁ μέσος αὐτῶν	The middle one of these	omi2 Eri
9	ὁ προηγούμενος τῶν τριῶν	The most advanced of the three	omi1 Eri
10	τῶν ἐν τῇ ἐξῆς διαστάσει δ ὁ ἑπόμενος	The reannost of the four stars in the-next interval	gam Eri
11	ὁ τούτου προηγούμενος	The one in advance of this	pi Eri
12	ὁ ἔτι τούτου προηγούμενος	The one in advance again of this	del Eri
13	ὁ τῶν ὁ προηγούμενος	The most advanced of the 4	eps Eri
14	ὁμοίως τῶν ἐν τῇ ἐφεξῆς διαστάσει δ ὁ ἑπόμενος	The reannost of the 4 stars in the next interval again	zet Eri
15	ὁ τούτου προηγούμενος	The one in advance of this	rho3 + rho2 Eri
16	ὁ ἔτι τούτου προηγούμενος	The one in advance again of this	eta Eri
17	ὁ τῶν ὁ προηγούμενος	The most advanced of the 4	HR 859
18	ὁ ἐν τῇ ἐπιστροφῇ τοῦ ποταμοῦ α’ ἀπτόμενος τοῦ στήθους τοῦ Κήτους	The first star _in the bend ofthe river, which [star] touches the ehest of Cetus	tau1 Eri
19	ὁ τούτῳ ἐπόμενος	The one to the rear of this	tau2 Eri
20	τῶν ἐφεξῆς τριῶν ὁ προηγούμενος	The most advanced of the next [group oll three	tau3 Eri
21	ὁ μέσος αὐτῶν	The midd1e one of these	tau4 Eri
22	ὁ ἐπόμευος τῶν τριῶν	The rearmost of the three	tau5 Eri
23	τῶν ἐξῆς ὡς ἐν τραπεξίῳ ὁ τῆς προηγουμένης πλευρᾶς ὁ βόρειος.	The next four stars, nearly fonning a trapezium: the northern one on the advance side	tau6 Eri
24	ὁ νοτιώτερος τῆς προηγουμένης πλευρᾶς	The next four stars, nearly fonning a trapezium: the southernmost on the advance side	tau7 Eri
25	τῆς ἐπομένης πλευρᾶς ὁ προηγούμενος	The next four stars, nearly fonning a trapezium: the more advanced one on the rear side	tau8 Eri
26	ὁ ἑπόμενος αὐτῆς καὶ λοιπὸς τῶν δ	The next four stars, nearly fonning a trapezium: the last of the 4, the rear one on that side	tau9 Eri
27	ὁ τῶν διεστώτων πρὸς ἀνατολὴν β συνεχῶν ὁ βόρειος	The northernmost of the 2 Stars close tagether at some distance to the east	ups1 Eri
28	ὁ ποτιώτερος αὐτῶν	The southernmost of them	ups2 Eri
29	τῶν ἐφεξῆς μετὰ τὴν καμπὴν β ὁ ἑπόμενος	The rearmost of the next 2 stars after the bend	ups3 Eri
30	ὁ προηγούμενος αὐτῶν	The more advanced of them	ups4 Eri
31	τῶν ἐν τῇ ἐξῆς διαστάσει γ’ ὁ ἐπόμευος	The rearmost of thc 3 stars in thc next interval	g Eri
32	ὁ μέσος αὐτῶν	The middle one	f Eri
33	ὁ προηγούμενος τῶν τριῶν	The most advanced of the three	h Eri
34	ὁ ἔσχατος τοῦ Ποταμοῦ λαμπρός	The last star of the river, the bright one	tet Eri
	ἀστέρες λδ, ὥν α μεγέθους ἂ, γ’ ἔ, δ’ ἧς, εἱ β.	{34 stars, 1 of the lirst magnitude, 5 of the third, 26 of the fourth, 2 of the fifth}

References

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