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Hubble · Caldwell 74 · Hubble Heritage Team (STScI/AURA/NASA/ESA)

Eight-Burst Nebula

Nebula in Vela · 2,000 light-years

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TypeNebula
ConstellationVela
Right ascension10h 07m 02s
Declination−40° 26′
Object distance2,000 light-years
Apparent magnitude9.2
Apparent size0.5′ (arc-minutes)
Approx. true diameter0.3 light-years across
Also known asC74 · NGC 3132
Caldwell 74, popularly known as the Eight-Burst Nebula, is a nebula (NGC 3132) in Vela — a luminous cloud of interstellar gas and dust. It appears as number 74 in the Caldwell catalogue, Sir Patrick Moore's 1995 list of 109 bright deep-sky objects for amateur astronomers. It spans roughly 0.5 arc-minutes on the sky. At about magnitude 9.2, it shows up in a small backyard telescope.

Although it appears about 0.5′ wide on the sky, its real span is roughly 0.3 light-years — the difference is a measure of how far away it lies.

Observing Eight-Burst Nebula

Eight-Burst Nebula lies in the constellation Vela and is best placed in the evening sky around February. Its maximum altitude above the horizon depends on your latitude. It is best placed for observers in the southern hemisphere, and sits low for those far north. A small backyard telescope will show it; binoculars may hint at it under dark skies. Note that the listed magnitude is spread across the whole object — diffuse galaxies and nebulae are often harder to see than the number alone suggests, so dark, moonless skies help a great deal.

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