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Delphinus

the Dolphin

Brightest star
Rotanev
Best seen
July to October, in the evening
Where
Seen from both hemispheres; best from the north in summer and autumn.
Abbreviation
Del

How to find Delphinus

A tiny, tight group of stars just east of Altair, a little diamond with a tail, like a dolphin leaping. Once seen it is easy to find again.

The story

In Greek myth a dolphin found the sea nymph Amphitrite for Poseidon, and another saved the poet Arion when he was thrown into the sea. Both were said to be honoured with these stars.

Worth knowing

Two of its stars are called Sualocin and Rotanev, which read backwards spell Nicolaus Venator, the Latin name of a 19th-century assistant at the Palermo Observatory.

Delphinus in six cultures

Around the world

Greek

Greek sailors often saw dolphins, so it is no surprise to find one in the sky. In the Amphitrite story, the dolphin calmed the shy sea nymph and brought her back to Poseidon's underwater palace off the island of Euboea. In the Arion story, the poet reached land on the dolphin's back and later had the sailors who tried to rob him brought to justice. Some say Apollo, god of music, set the dolphin in the sky beside Arion's lyre, Lyra.

English folk name

In English the little group was once popularly called Job's Coffin, perhaps because of its box-like shape. Sometimes the name means only the diamond of four stars. Nobody knows who first used it, or when.

Chinese

Chinese astronomers saw two gourds of the calabash vine, grown for food and dried for containers. The diamond plus one more star was Hugua, a hard, dried gourd ready to use as a scoop or vessel. The fainter stars of the tail were Baigua, a gourd that had gone over-ripe and rotten.

Aboriginal Australian (Murray River)

People of the Murray River tell of Totyerguil the hunter (the star Altair), who speared Otjout, a giant Murray cod. The wounded fish thrashed a channel across southern Australia, and that channel became the Murray River. Then the cod rose into the sky as the stars of Delphinus.

Polynesian

Two Polynesian peoples are known to have named it: on Pukapuka in the Cook Islands it was Te Toloa, and in the Tuamotus Te Uru-o-tiki.

Indian

In Indian astronomy the stars of Delphinus belong to Dhanishta, one of the nakshatras, or lunar mansions.

Folk beliefs and customs

Free during the beta.

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