C28
NGC 752
천체 데이터
- 카탈로그 지정명
- C28
- 유형
- OpenCluster
- 별자리
- Andromeda
- 등급
- 5.7
- 적경
- 01h 57m 24.0s
- 적위
- +37° 49' 01.2"
- 거리
- 1,300 광년
- 각크기
- 50
서베이 이미지
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C28 소개
설명
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.
관측 팁
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.
역사
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.
재미있는 사실
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.
커뮤니티 사진 (1)
Credit: Roberto Mura. License: CC BY-SA 3.0. (Wikimedia Commons)
Skybred Mar 2, 2026