About NGC 3690
NGC 3690 is an uncommon galaxy. It sits in the constellation UMa.
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 3690
RA 172.1346° · Dec 58.5619° · 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 Ursa Major.
- 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 March — 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
- UMa
- dso type
- GPair
- name
- NGC 3690
- size arcmin
- 2.1
How to see it
Look for NGC 3690 in the constellation UMa.
Like any astronomical target, NGC 3690 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 3690 is an uncommon galaxy
NGC 3690 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.