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M72

NGC 6981

구상성단 양호 (46/100)
M72 GlobularCluster Aquarius 관측 가능 난이도 5 Expert level - Higher magnification helpful
Credit: en:NASA, en:STScI, en:WikiSky. License: Public domain. (Wikimedia Commons)
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특성

등급 9.3
각크기 4.5′
거리 54600 ly
Globular Cluster [Distance: 54600 ly]

위치 & 식별자

RA 20h 53m 27.7s
Dec -12° 32' 14.3"
별자리 Aquarius
카탈로그 M72

가시성

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M72 소개

설명

M72 is a relatively faint, remote globular cluster in Aquarius, about 55,400 light-years from Earth — one of the most distant Messier globulars. It spans about 106 light-years and contains several tens of thousands of stars. The cluster is loosely concentrated and relatively unremarkable in appearance.

관측 팁

Located about 3 degrees south-southeast of Epsilon Aquarii and about 1.5 degrees east of the asterism M73. In binoculars it appears as a very small, faint fuzzy dot. A 6-inch telescope shows a small, round, unresolved glow. Due to its great distance, resolving individual stars requires 10 inches or more. It is one of the least visually impressive Messier globulars. Best observed from August through October.

역사

Discovered by Pierre Mechain on August 29, 1780. Charles Messier observed it on October 4, 1780 and described it as a 'very faint nebula.' Its distance and faintness have made it one of the less studied Messier globulars.

재미있는 사실

At 55,400 light-years, M72 is one of the most distant Messier objects. It also lies beyond the galactic center as seen from Earth, in the outer halo of the Milky Way. The cluster contains 42 known variable stars, most of them RR Lyrae type.

커뮤니티 사진 (1)

Credit: en:NASA, en:STScI, en:WikiSky. License: Public domain. (Wikimedia Commons)

Credit: en:NASA, en:STScI, en:WikiSky. License: Public domain. (Wikimedia Commons)

Skybred Feb 28, 2026