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Rare variable star 47 EP

HR 8298

RA 325.5348° · Dec 45.7657° · star

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Score breakdown

· 7 badges
47 pts · Rare
Rare 50 pts → Epic
  • Fades out of naked-eye view +16
  • Deep red star +8
  • Red dwarf +6
  • Variable star +5
  • Cool red M-type star +5
  • Gently variable +4
  • A named variable star +3
Total score 47

3 more points to reach Epic.

Badges

  • Variable star · +5
  • Cool red M-type star · +5
  • Deep red star · +8
  • Red dwarf · +6
  • Gently variable · +4
  • Fades out of naked-eye view · +16
  • A named variable star · +3

Trivia

What it actually is

  • Spectral class. Its spectrum reads M4.5 — an M-type red star — and M stars are the silent majority: roughly three of every four stars in the galaxy are one.
  • It changes. This star does not hold still: its brightness rises and falls on a rhythm of hours, days or years, either pulsing in size or being eclipsed by a companion.

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 6.1 it is just past naked-eye reach — ordinary binoculars will pull it in, over in Cygnus.
  • 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. ≈ 12 million years at Voyager 1's speed (17 km/s).

Properties

absmag
-0.497
bv
1.415
constellation
Cyg
dist ly
683.7652
luminosity
137.6575
mag
6.11
name
HR 8298
spect
M4.5
var amplitude
0.22
var designation
V1339
var max
5.994
var min
6.214

About HR 8298

HR 8298 is a rare variable star. It lies about 683.8 light-years from Earth, sits in the constellation Cyg, shines at apparent magnitude 6.11 and has spectral type M4.5.

Its spectrum reads M4.5 — an M-type red star — and M stars are the silent majority: roughly three of every four stars in the galaxy are one.

How to see it

Look for HR 8298 in the constellation Cyg. At apparent magnitude 6.11, it is an easy target for binoculars.

Like any astronomical target, HR 8298 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 HR 8298 is a rare variable star

HR 8298 scores 47 points on Spacedle's rarity scale, which places it in the rare tier. Another 3 points would lift it into a rarer tier.

That score comes from 7 science badges — Variable star, Cool red M-type star, Deep red star, Red dwarf, Gently variable, Fades out of naked-eye view and A named variable 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.