C28
NGC 752
Dados do Objeto
- Designação do Catálogo
- C28
- Tipo
- OpenCluster
- Constelação
- Andromeda
- Magnitude
- 5.7
- Ascensão Reta
- 01h 57m 24.0s
- Declinação
- +37° 49' 01.2"
- Distância
- 1,300 anos-luz
- Tamanho Angular
- 50
Imagem de Levantamento
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Sobre C28
Descrição
NGC 752 is a large, sparse open cluster in Andromeda, about 1,300 light-years away. At roughly 1.1 billion years old, it is one of the older open clusters and spans a generous 50 arcminutes across the sky.
Dicas de Observação
Best in binoculars or a wide-field telescope at low power, as the cluster is too large for typical eyepiece fields. About 60 stars from magnitude 8-10 are spread across nearly a full degree. Best in autumn and winter evenings.
História
Possibly observed by Giovanni Battista Hodierna before 1654. Independently found by Caroline Herschel in 1783. One of the benchmark clusters used to calibrate stellar evolution models.
Curiosidades
NGC 752 is old enough that its most massive stars have already evolved off the main sequence, leaving a characteristic red giant branch that helps astronomers test stellar evolution theories.
Fotos da Comunidade (1)
Credit: Roberto Mura. License: CC BY-SA 3.0. (Wikimedia Commons)
Skybred Mar 2, 2026