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Uncommon star 23 EP

13Rho Hya

RA 132.1082° · Dec 5.8378° · star

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Score breakdown

· 5 badges
23 pts · Uncommon
Uncommon 34 pts → Rare
  • Naked-eye visible +8
  • White A-type star +5
  • Blue-white star +5
  • Star +3
  • Main-sequence star +2
Total score 23

11 more points to reach Rare.

Badges

  • Star · +3
  • Naked-eye visible · +8
  • White A-type star · +5
  • Main-sequence star · +2
  • Blue-white star · +5

Trivia

What it actually is

  • Spectral class. Its spectrum reads A0Vn — an A-type star: white-hot, typically about twice the Sun's mass, and the class most of the sky's famous bright stars belong to.
  • Where it is in life. It is on the main sequence, quietly fusing hydrogen in its core exactly as the Sun does.

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 4.3 you can see it with your own eyes from a dark site, over in Hydra.
  • Seen from everywhere. It sits almost on the celestial equator, so it can be seen from essentially anywhere on Earth.
  • Best time of year. It stands highest in the middle of the night around February — 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. ≈ 6.2 million years at Voyager 1's speed (17 km/s).

Properties

absmag
-0.829
bv
-0.044
constellation
Hya
dist ly
354.1324
luminosity
186.896
mag
4.35
name
13Rho Hya
spect
A0Vn

About 13Rho Hya

13Rho Hya is an uncommon star. It lies about 354.1 light-years from Earth, sits in the constellation Hya, shines at apparent magnitude 4.35 and has spectral type A0Vn.

Its spectrum reads A0Vn — an A-type star: white-hot, typically about twice the Sun's mass, and the class most of the sky's famous bright stars belong to.

How to see it

Look for 13Rho Hya in the constellation Hya. At apparent magnitude 4.35, it can be glimpsed with the unaided eye under dark skies.

Like any astronomical target, 13Rho Hya 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 13Rho Hya is an uncommon star

13Rho Hya scores 23 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 11 points would lift it into a rarer tier.

That score comes from 5 science badges — Star, Naked-eye visible, White A-type star, Main-sequence star and Blue-white star — 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.