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Uncommon star 27 EP

Alkarab

RA 351.3449° · Dec 23.4041° · star

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Score breakdown

· 5 badges
27 pts · Uncommon
Uncommon 34 pts → Rare
  • Naked-eye visible +8
  • Has a proper name +8
  • Subgiant (leaving the main sequence) +5
  • Star +3
  • Yellow-white F-type star +3
Total score 27

7 more points to reach Rare.

Badges

  • Star · +3
  • Naked-eye visible · +8
  • Has a proper name · +8
  • Yellow-white F-type star · +3
  • Subgiant (leaving the main sequence) · +5

Trivia

What it actually is

  • Spectral class. Its spectrum reads F8IV — an F-type star — a little hotter, whiter and shorter-lived than the Sun.
  • Where it is in life. It is a subgiant, caught in the act of leaving the main sequence as the hydrogen in its core runs out.

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 4.4 you can see it with your own eyes from a dark site, over in Pegasus.
  • 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.

Could we get there?

  • Verdict. Hopelessly far for any craft humanity can build today.

Getting there

  • Aboard Voyager 1. ≈ 3 million years at Voyager 1's speed (17 km/s).

Properties

absmag
0.83
bv
0.617
constellation
Peg
dist ly
170.4054
luminosity
40.5509
mag
4.42
name
Alkarab
named
yes
spect
F8IV

About Alkarab

Alkarab is an uncommon star. It lies about 170.4 light-years from Earth, sits in the constellation Peg, shines at apparent magnitude 4.42 and has spectral type F8IV.

Its spectrum reads F8IV — an F-type star — a little hotter, whiter and shorter-lived than the Sun.

How to see it

Look for Alkarab in the constellation Peg. At apparent magnitude 4.42, it can be glimpsed with the unaided eye under dark skies.

Like any astronomical target, Alkarab 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 Alkarab is an uncommon star

Alkarab scores 27 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 7 points would lift it into a rarer tier.

That score comes from 5 science badges — Star, Naked-eye visible, Has a proper name, Yellow-white F-type star and Subgiant (leaving the main sequence) — 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.