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Epic variable star 53 EP

HD 192737

RA 304.2772° · Dec -21.3179° · star

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Score breakdown

· 6 badges
53 pts · Epic
Epic 78 pts → Anomaly
  • Carbon star (sooty red) +24
  • Strongly variable +10
  • Deep red star +8
  • Variable star +5
  • On the zodiac +3
  • A named variable star +3
Total score 53

25 more points to reach Anomaly.

Badges

  • Variable star · +5
  • On the zodiac · +3
  • Carbon star (sooty red) · +24
  • Deep red star · +8
  • Strongly variable · +10
  • A named variable star · +3

Trivia

What it actually is

  • Spectral class. Its spectrum reads C — a carbon star, wrapped in so much soot that its light is filtered to a deep ruby red.
  • 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 7 it is just past naked-eye reach — ordinary binoculars will pull it in, over in Capricornus.
  • 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 July — 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. ≈ 16.7 million years at Voyager 1's speed (17 km/s).

Properties

absmag
-0.347
bv
2.45
constellation
Cap
dist ly
948.128
luminosity
119.8947
mag
6.97
name
HD 192737
spect
C
var amplitude
0.52
var designation
RT
var max
6.808
var min
7.328

About HD 192737

HD 192737 is an epic variable star. It lies about 948.1 light-years from Earth, sits in the constellation Cap, shines at apparent magnitude 6.97 and has spectral type C.

Its spectrum reads C — a carbon star, wrapped in so much soot that its light is filtered to a deep ruby red.

How to see it

Look for HD 192737 in the constellation Cap. At apparent magnitude 6.97, it is an easy target for binoculars.

Like any astronomical target, HD 192737 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 192737 is an epic variable star

HD 192737 scores 53 points on Spacedle's rarity scale, which places it in the epic tier. Another 25 points would lift it into a rarer tier.

That score comes from 6 science badges — Variable star, On the zodiac, Carbon star (sooty red), Deep red star, Strongly variable 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.