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Common star 20 EP

HD 235740

RA 332.3461° · Dec 54.1779° · star

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Score breakdown

· 4 badges
20 pts · Common
Common 22 pts → Uncommon
  • Sun-like G-type star +8
  • Subgiant (leaving the main sequence) +5
  • Never sets (northern circumpolar) +4
  • Star +3
Total score 20

2 more points to reach Uncommon.

Badges

  • Star · +3
  • Never sets (northern circumpolar) · +4
  • Sun-like G-type star · +8
  • Subgiant (leaving the main sequence) · +5

Trivia

What it actually is

  • Spectral class. Its spectrum reads G0IV — a G-type star: the very same spectral class as our own 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 9 you'll want a small backyard telescope, over in Cepheus.
  • 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 August — 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. ≈ 6.1 million years at Voyager 1's speed (17 km/s).

Properties

absmag
3.908
bv
0.64
constellation
Cep
dist ly
346.6057
luminosity
2.3812
mag
9.04
name
HD 235740
spect
G0IV

About HD 235740

HD 235740 is a common star. It lies about 346.6 light-years from Earth, sits in the constellation Cep, shines at apparent magnitude 9.04 and has spectral type G0IV.

Its spectrum reads G0IV — a G-type star: the very same spectral class as our own Sun.

How to see it

Look for HD 235740 in the constellation Cep. At apparent magnitude 9.04, a small backyard telescope will bring it into view.

Like any astronomical target, HD 235740 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 235740 is a common star

HD 235740 scores 20 points on Spacedle's rarity scale, which places it in the common tier. Another 2 points would lift it into a rarer tier.

That score comes from 4 science badges — Star, Never sets (northern circumpolar), Sun-like G-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.