Omega Nebula (M17)
Also known as M17 · M 17 · Omega Nebula · NGC 6618 · Checkmark Nebula
Omega Nebula (M17) is a nebula in the constellation Sagittarius, about 5,920 light-years from Earth.
Facts
| Type | Nebula |
|---|---|
| Constellation | Sagittarius |
| Position (J2000) | 18h 20m 47s, −16° 10′ |
| Distance | 5,920 light-years (its light set off about 5,920 years ago) |
| Brightness | magnitude 7 (smaller is brighter; the faintest stars the eye sees are about 6) |
| Size on the sky | 1.6′ × 1.6′ (the full Moon is about 31′) |
| Filter | UHC (narrowband) filter (Glowing gas shines in a few colours of hydrogen and oxygen: a UHC filter passes those and blocks most light pollution and sky glow.) |
| Studied in | 1,714 scientific papers (SIMBAD) |
When and how to see it
Omega Nebula (M17) is highest in the sky at midnight in June. From India (about 20° N) it climbs to about 54° above the horizon; from 50° N, to about 24°. To see it you need binoculars.
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 Sagittarius
- Lagoon Nebula (M8)
- M18 (NGC 6613)
- M21 (NGC 6531)
- M23 (NGC 6494)
- Sagittarius A*
- Sagittarius Cluster (M22)
- Sagittarius Star Cloud (M24)
- Trifid Nebula (M20)
Everything in Sagittarius · All 88 constellations · All sky objects
Data: SIMBAD (CDS, Strasbourg; the site's weekly copy) · OpenNGC · Data sources & credits