Arches Cluster
Arches Cluster is a cluster of stars in the constellation Sagittarius.
Densest star cluster in our galaxy
Facts
| Type | Cluster of stars |
|---|---|
| Constellation | Sagittarius |
| Position (J2000) | 17h 45m 50s, −28° 49′ |
| Size on the sky | 0.4′ × 0.4′ (the full Moon is about 31′) |
| Filter | No filter (It shines in starlight of every colour, so a nebula filter would only dim it; a dark sky helps more.) |
| Studied in | 812 scientific papers (SIMBAD) |
When and how to see it
Arches Cluster is highest in the sky at midnight in June. From India (about 20° N) it climbs to about 41° above the horizon; from 50° N, to about 11°.
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)
- Omega Nebula (M17)
- Sagittarius A*
- Sagittarius Cluster (M22)
- Trifid Nebula (M20)
Everything in Sagittarius · All 88 constellations · All sky objects
Data: SIMBAD (CDS, Strasbourg; the site's weekly copy) · Data sources & credits