Sadr
Also known as γ Cyg · HR 7796
Sadr is a star in the constellation Cygnus, about 1,830 light-years from Earth.
Facts
| Type | Star (spectral type F8Ib) |
|---|---|
| Constellation | Cygnus |
| Position (J2000) | 20h 22m 13s, +40° 15′ |
| Distance | 1,830 light-years (its light set off about 1,830 years ago) |
| Brightness | magnitude 2.23 (smaller is brighter; the faintest stars the eye sees are about 6) |
| Studied in | 608 scientific papers (SIMBAD) |
When and how to see it
Sadr is highest in the sky at midnight in July. From India (about 20° N) it climbs to about 70° above the horizon; from 50° N, to about 80°. To see it you need the naked eye, even from a town.
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 Cygnus
- Cooling Tower Cluster (M29)
- Cygnus A
- Cygnus X-1
- Fireworks Galaxy
- M39 (NGC 7092)
- North America Nebula
- Pelican Nebula
- Veil Nebula
Everything in Cygnus · All 88 constellations · All sky objects
Data: SIMBAD (CDS, Strasbourg; the site's weekly copy) · Data sources & credits