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Uncommon star 22 EP

HD 221170

RA 352.3700° · Dec 30.4327° · star

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Score breakdown

· 4 badges
22 pts · Uncommon
Uncommon 34 pts → Rare
  • Sun-like G-type star +8
  • Distant (over 1,000 light-years) +6
  • Subgiant (leaving the main sequence) +5
  • Star +3
Total score 22

12 more points to reach Rare.

Badges

  • Star · +3
  • Distant (over 1,000 light-years) · +6
  • Sun-like G-type star · +8
  • Subgiant (leaving the main sequence) · +5

Trivia

What it actually is

  • Spectral class. Its spectrum reads G2IV — 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 7.7 it is just past naked-eye reach — ordinary binoculars will pull it in, 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. Impossible with our current technology — and the next millennium of it.

Getting there

  • Aboard Voyager 1. ≈ 19.5 million years at Voyager 1's speed (17 km/s).

Properties

absmag
0.012
bv
1.027
constellation
Peg
dist ly
1109.3743
luminosity
86.139
mag
7.67
name
HD 221170
spect
G2IV

Nearby objects

About HD 221170

HD 221170 is an uncommon star. It lies about 1,109.4 light-years from Earth, sits in the constellation Peg, shines at apparent magnitude 7.67 and has spectral type G2IV.

Its spectrum reads G2IV — a G-type star: the very same spectral class as our own Sun.

How to see it

Look for HD 221170 in the constellation Peg. At apparent magnitude 7.67, it is an easy target for binoculars.

Like any astronomical target, HD 221170 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 221170 is an uncommon star

HD 221170 scores 22 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 12 points would lift it into a rarer tier.

That score comes from 4 science badges — Star, Distant (over 1,000 light-years), 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.