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Uncommon star 32 EP

HD 233898

RA 181.7202° · Dec 51.7353° · star

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Score breakdown

· 6 badges
32 pts · Uncommon
Uncommon 34 pts → Rare
  • Deep red star +8
  • Distant (over 1,000 light-years) +6
  • Red dwarf +6
  • Cool red M-type star +5
  • Never sets (northern circumpolar) +4
  • Star +3
Total score 32

2 more points to reach Rare.

Badges

  • Star · +3
  • Distant (over 1,000 light-years) · +6
  • Never sets (northern circumpolar) · +4
  • Cool red M-type star · +5
  • Deep red star · +8
  • Red dwarf · +6

Trivia

What it actually is

  • Spectral class. Its spectrum reads M0 — an M-type red star — and M stars are the silent majority: roughly three of every four stars in the galaxy are one.

Sense of scale

  • In perspective. Far away by human standards, yet still a local address inside the Milky Way's spiral arms.

Find it in the sky

  • How to spot it. At magnitude 9 you'll want a small backyard telescope, over in 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.

Could we get there?

  • Verdict. Impossible with our current technology — and the next millennium of it.

Getting there

  • Aboard Voyager 1. ≈ 38.2 million years at Voyager 1's speed (17 km/s).
  • Fastest probe ever. ≈ 3.4 million years even at the Parker Solar Probe's 192 km/s.

Properties

absmag
-0.12
bv
1.401
constellation
UMa
dist ly
2174.3734
luminosity
97.2747
mag
9
name
HD 233898
spect
M0

About HD 233898

HD 233898 is an uncommon star. It lies about 2,174.4 light-years from Earth, sits in the constellation UMa, shines at apparent magnitude 9 and has spectral type M0.

Its spectrum reads M0 — an M-type red star — and M stars are the silent majority: roughly three of every four stars in the galaxy are one.

How to see it

Look for HD 233898 in the constellation UMa. At apparent magnitude 9, it is an easy target for binoculars.

Like any astronomical target, HD 233898 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 HD 233898 is an uncommon star

HD 233898 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 6 science badges — Star, Distant (over 1,000 light-years), Never sets (northern circumpolar), Cool red M-type star, Deep red star and Red dwarf — 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.