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Uncommon star 27 EP

Alchiba

RA 182.1034° · Dec -24.7289° · 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 F0IV/V — 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. Inside our stellar backyard: every radio broadcast humanity has ever made has already swept past it.

Find it in the sky

  • How to spot it. At magnitude 4 you can see it with your own eyes from a dark site, over in Corvus.
  • Southern sky. It rides the southern half of the sky — an easier target the further south 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. Hopelessly far for any craft humanity can build today.

Getting there

  • Aboard Voyager 1. ≈ 856.1 thousand years at Voyager 1's speed (17 km/s).

Properties

absmag
3.149
bv
0.334
constellation
Crv
dist ly
48.7163
luminosity
4.7907
mag
4.02
name
Alchiba
named
yes
spect
F0IV/V

About Alchiba

Alchiba is an uncommon star. It lies about 48.7 light-years from Earth, sits in the constellation Crv, shines at apparent magnitude 4.02 and has spectral type F0IV/V.

Its spectrum reads F0IV/V — an F-type star — a little hotter, whiter and shorter-lived than the Sun.

How to see it

Look for Alchiba in the constellation Crv. At apparent magnitude 4.02, it can be glimpsed with the unaided eye under dark skies.

Like any astronomical target, Alchiba 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 Alchiba is an uncommon star

Alchiba 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.