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Triangulum Galaxy (M33)

Also known as M33 · M 33 · Triangulum Galaxy · NGC 598 · Triangulum Pinwheel

Triangulum Galaxy (M33) is a galaxy in the constellation Triangulum, about 2.78 million light-years from Earth.

Triangulum Galaxy (M33): a sky-survey photograph of its field
Sky survey view (DSS2 colour, or a backup survey)

Facts

TypeGalaxy (shape SA(s)cd)
ConstellationTriangulum
Position (J2000)1h 33m 50s, +30° 39′
Distance2.78 million light-years (its light set off about 2.78 million years ago)
Brightnessmagnitude 5.72 (smaller is brighter; the faintest stars the eye sees are about 6)
Size on the sky60.3′ × 35.5′ (the full Moon is about 31′)
FilterNo filter (It shines in starlight of every colour, so a nebula filter would only dim it; a dark sky helps more.)
Studied in6,313 scientific papers (SIMBAD)

When and how to see it

Triangulum Galaxy (M33) is highest in the sky at midnight in October. From India (about 20° N) it climbs to about 79° above the horizon; from 50° N, to about 71°. To see it you need the naked eye from a dark site.

Heights are worked out for India and for 50° N. Set your location in Settings to see them for where you are.

For tonight's best time from your own town, the darkness and the Moon, open it on the map and see its "Tonight from your location" card.

More in Triangulum

Everything in Triangulum · All 88 constellations · All sky objects

Data: SIMBAD (CDS, Strasbourg; the site's weekly copy) · OpenNGC · Data sources & credits