About NGC 7686
NGC 7686 is a common cluster. It sits in the constellation And and shines at apparent magnitude 5.6.
An open cluster: a few hundred stars born together out of one collapsing cloud, still drifting along in loose formation.
Common cluster 16 EP
NGC 7686
RA 352.5308° · Dec 49.1341° · openngc
Score breakdown
· 3 badgesCommon 22 pts → Uncommon
- Star cluster +7
- Bright deep-sky object +6
- Open cluster +3
Total score 16
6 more points to reach Uncommon.
Badges
- Star cluster · +7
- Bright deep-sky object · +6
- Open cluster · +3
Trivia
What it actually is
- What it actually is. An open cluster: a few hundred stars born together out of one collapsing cloud, still drifting along in loose formation.
Sense of scale
- Sense of scale. Gravity is not strong enough to hold it. Within a few hundred million years these siblings will be scattered right around the galaxy.
Find it in the sky
- How to spot it. At magnitude 5.6 you can see it with your own eyes from a dark site, over in Andromeda.
- 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 September — that's when to go looking.
Its true colour
- Its true colour. Open clusters look blue-white because they are young — their hottest, bluest stars have not had time to die yet.
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
- And
- dso type
- OCl
- mag
- 5.6
- name
- NGC 7686
- radial velocity kms
- 6
- redshift
- 0
- size arcmin
- 3.6
Nearby objects
How to see it
Look for NGC 7686 in the constellation And. At apparent magnitude 5.6, it can be glimpsed with the unaided eye under dark skies.
Like any astronomical target, NGC 7686 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 7686 is a common cluster
NGC 7686 scores 16 points on Spacedle's rarity scale, which places it in the common tier. Another 6 points would lift it into a rarer tier.
That score comes from 3 science badges — Star cluster, Bright deep-sky object and Open cluster — 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.