About NGC 6813
NGC 6813 is a common nebula. It sits in the constellation Vul.
A planetary nebula: the shed outer atmosphere of a dying Sun-like star, lit from within by the naked stellar core left behind.
Common nebula 20 EP
NGC 6813
RA 295.0935° · Dec 27.3096° · openngc
Score breakdown
· 2 badgesCommon 22 pts → Uncommon
- Planetary nebula (a dying star's shell) +12
- Nebula +8
Total score 20
2 more points to reach Uncommon.
Badges
- Nebula · +8
- Planetary nebula (a dying star's shell) · +12
Trivia
What it actually is
- What it actually is. A planetary nebula: the shed outer atmosphere of a dying Sun-like star, lit from within by the naked stellar core left behind.
Find it in the sky
- Where to look. You'll find it in the constellation Vulpecula.
- Northern sky. It rides the northern half of the sky — an easier target the further north you are.
- Best time of year. It stands highest in the middle of the night around July — that's when to go looking.
Its true colour
- Its true colour. Its teal-green comes from doubly-ionised oxygen at 501 nanometres, and its red from hydrogen at 656 — colours no ordinary object on Earth produces.
What's in a name
- A misleading name. 'Planetary nebula' is a 240-year-old mistake. William Herschel coined it in the 1780s because these round greenish discs resembled the planet Uranus he had just discovered. There are no planets involved whatsoever.
How we came to know it
- The New General Catalogue. Its NGC number comes from J. L. E. Dreyer's 1888 catalogue, itself built on decades of sky sweeps by William Herschel and his sister Caroline.
Properties
- constellation
- Vul
- dso type
- PN
- name
- NGC 6813
- size arcmin
- 3
How to see it
Look for NGC 6813 in the constellation Vul.
Like any astronomical target, NGC 6813 is best seen from a dark site away from city lights, and when it is above the horizon depends on your latitude and the time of year. The visibility panel above works out tonight's viewing window for your saved location.
Why NGC 6813 is a common nebula
NGC 6813 scores 20 points on Spacedle's rarity scale, which places it in the common tier. Another 2 points would lift it into a rarer tier.
That score comes from 2 science badges — Nebula and Planetary nebula (a dying star's shell) — each earned for a real, measurable property of the object. Rarity on Spacedle is never random: the more remarkable an object's astrophysics, the more badges it collects, the higher it scores, and the rarer it ranks.