M30 (NGC 7099)
Also known as M30 · M 30 · NGC 7099
M30 (NGC 7099) is a globular star cluster in the constellation Capricornus, about 22,830 light-years from Earth.
Facts
| Type | Globular star cluster |
|---|---|
| Constellation | Capricornus |
| Position (J2000) | 21h 40m 22s, −23° 10′ |
| Distance | 22,830 light-years (its light set off about 22,830 years ago) |
| Brightness | magnitude 7.1 (smaller is brighter; the faintest stars the eye sees are about 6) |
| Size on the sky | 11′ × 11′ (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 | 1,139 scientific papers (SIMBAD) |
When and how to see it
M30 (NGC 7099) is highest in the sky at midnight in August. From India (about 20° N) it climbs to about 47° above the horizon; from 50° N, to about 17°. 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 Capricornus
Everything in Capricornus · All 88 constellations · All sky objects
Data: SIMBAD (CDS, Strasbourg; the site's weekly copy) · OpenNGC · Data sources & credits