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C54

NGC 2506

산개성단 우수 (60/100)
C54 OpenCluster Monoceros 관측 가능 난이도 1 Naked eye / Binoculars - Wide field preferred
Credit: YayLol123. License: CC BY 4.0. (Wikimedia Commons)
성도
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특성

등급 7.6
각크기 10.8′
거리 11000 ly
Open Cluster [Distance: 11000 ly]

위치 & 식별자

RA 08h 00m 02.4s
Dec -10° 46' 26.4"
별자리 Monoceros
카탈로그 C54

가시성

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접안렌즈 시야

108x TFOV: 0.5° Lim. mag: 13.3
N E

C54 · 10.8′ diameter · N up, E left

최적 배율

분류 디코더

서베이 이미지

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C54 소개

설명

NGC 2506 is an open cluster in Monoceros, about 10,000 light-years away. It is a rich, compact cluster containing over 150 stars concentrated in about 7 arcminutes, with an age of roughly 2 billion years.

관측 팁

Visible as a hazy, unresolved patch in a 4-inch telescope. An 8-inch scope begins to resolve the brighter stars at 100x+. The cluster's distance makes it harder to resolve than most open clusters. Best in winter evenings.

역사

Discovered by William Herschel on February 23, 1791. Its great distance and old age make it a valuable laboratory for studying stellar evolution in open clusters.

재미있는 사실

At about 2 billion years old, NGC 2506 is one of the oldest open clusters still recognizable as a cluster. It has survived because it orbits relatively far from the galactic plane, avoiding the gravitational disruptions that tear most clusters apart.

커뮤니티 사진 (1)

Credit: YayLol123. License: CC BY 4.0. (Wikimedia Commons)

Credit: YayLol123. License: CC BY 4.0. (Wikimedia Commons)

Skybred Mar 2, 2026