V404 Cygni
Also known as V404 Cyg
V404 Cygni is an X-ray binary star in the constellation Cygnus, about 10,790 light-years from Earth.
Black hole in a binary system, flared in 2015
Facts
| Type | X-ray binary star (spectral type G9/K0III/V) |
|---|---|
| Constellation | Cygnus |
| Position (J2000) | 20h 24m 03s, +33° 52′ |
| Distance | 10,790 light-years (its light set off about 10,790 years ago) |
| Studied in | 1,393 scientific papers (SIMBAD) |
When and how to see it
V404 Cygni is highest in the sky at midnight in July. From India (about 20° N) it climbs to about 76° above the horizon; from 50° N, to about 74°.
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