About NGC 6817
NGC 6817 is an uncommon galaxy. It sits in the constellation Dra.
Not one galaxy but two, locked in a gravitational embrace. Encounters like this shred spiral arms and trigger furious bursts of star formation.
Uncommon galaxy 32 EP
NGC 6817
RA 294.3433° · Dec 62.3831° · openngc
Score breakdown
· 3 badgesUncommon 34 pts → Rare
- Galaxy +14
- Interacting galaxy pair +14
- Never sets (northern circumpolar) +4
Total score 32
2 more points to reach Rare.
Badges
- Galaxy · +14
- Interacting galaxy pair · +14
- Never sets (northern circumpolar) · +4
Trivia
What it actually is
- What it actually is. Not one galaxy but two, locked in a gravitational embrace. Encounters like this shred spiral arms and trigger furious bursts of star formation.
Sense of scale
- Sense of scale. Galaxies pass through each other almost without collisions — the stars are so far apart that they simply miss.
- Scale. Home to hundreds of billions of stars — a universe unto itself, and every one of those points of light could have planets.
Find it in the sky
- Where to look. You'll find it in the constellation Draco.
- Never sets. So far north that from Britain, Canada or northern Europe it never dips below the horizon — it is up every clear night of the year.
- Best time of year. It stands highest in the middle of the night around July — that's when to go looking.
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
- Dra
- dso type
- GPair
- name
- NGC 6817
- size arcmin
- 0.9
Nearby objects
How to see it
Look for NGC 6817 in the constellation Dra.
Like any astronomical target, NGC 6817 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 6817 is an uncommon galaxy
NGC 6817 scores 32 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 2 points would lift it into a rarer tier.
That score comes from 3 science badges — Galaxy, Interacting galaxy pair and Never sets (northern circumpolar) — 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.