Estrela em Crux

Imai

δ Cru HR 4656 HIP 59747 magnitude 2,75

The Mursi name a line of four stars imai (δ Cru), thaadoi (β Cru), waar (β Cen) and sholbi (α Cen). Their successive disappearance (heliacal setting) are used to determine when the River Omo will flood (it does this se…

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Astronomia

Informação oficial da IAU

Designação

HR 4656

HIP

59747

ID de Bayer

δ Cru

Magnitude visual

2,75

Ascensão reta (J2000)

183,786°

Declinação (J2000)

-58,7489°

Adoção pela IAU

2018/08/10

Origem do nome

The Mursi name a line of four stars imai (δ Cru), thaadoi (β Cru), waar (β Cen) and sholbi (α Cen). Their successive disappearance (heliacal setting) are used to determine when the River Omo will flood (it does this several times) and hence to determine when to plant the annual crop of cowpeas beside it (after the last flood but before the ground dries out). Imai is the Mursi name for the grass that grows along the banks of the river (Rhynchelytrum repens). It is said that when the imai star disappears, the Omo rises high enough to flatten the imai grass.

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