Planetary nebula
A 61
Planetary nebula
A shell of gas thrown off by a dying Sun-like star, glowing in the ultraviolet light of the hot core at its centre. Within a few tens of thousands of years it will disperse and fade from view. The distance is a statistical estimate, uncertain by 30–50 %.
| Type | Planetary nebula |
|---|---|
| Constellation | Cygnus |
| Distance | 1,280 pc (4.2 thousand ly) · estimated |
| Diameter | 4.0 ly |
| Central star | V 17.4 |
| Expansion speed | 32 km/s |
| PN G name | PN G077.6+14.7 |
| Source | Strasbourg–ESO PN Catalogue |
| Right ascension (J2000) | 19h 19m 10.2s |
| Declination (J2000) | +46° 14′ 36″ |
In the sky
Visible from the whole Northern Hemisphere and south to latitude 44° S. North of latitude 44° N it never sets. It stands highest at midnight in July, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out 4,175 years ago. At that time the first farming villages were being founded; there was no writing yet. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 74 million years.