Planetary nebula
A 45
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 | Scutum |
| Distance | 1,150 pc (3.8 thousand ly) · estimated |
| Diameter | 5.2 ly |
| Central star | V 21.1 |
| PN G name | PN G020.2-00.6 |
| Source | Strasbourg–ESO PN Catalogue |
| Right ascension (J2000) | 18h 30m 17.4s |
| Declination (J2000) | −11° 36′ 54″ |
In the sky
Visible from the whole Southern Hemisphere and north to latitude 78° N. South of latitude 78° S it never sets. It stands highest at midnight in June, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around 1726 BC. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 67 million years.