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Rare variable star 39 EP

HIP 12031

RA 38.7816° · Dec 3.7325° · star

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Score breakdown

· 5 badges
39 pts · Rare
Rare 50 pts → Epic
  • White dwarf (a burnt-out core) +22
  • Variable star +5
  • Blue-white star +5
  • Gently variable +4
  • A named variable star +3
Total score 39

11 more points to reach Epic.

Badges

  • Variable star · +5
  • White dwarf (a burnt-out core) · +22
  • Blue-white star · +5
  • Gently variable · +4
  • A named variable star · +3

Trivia

What it actually is

  • Spectral class. Its spectrum reads DAwe... — a white dwarf — the exposed, Earth-sized cinder of a dead star, with nothing left to burn.
  • 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 12.4 it is far too faint for the eye: this one belongs to cameras and long exposures, over in Cetus.
  • 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 October — 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. ≈ 5.3 million years at Voyager 1's speed (17 km/s).

Properties

absmag
7.597
bv
-0.201
constellation
Cet
dist ly
299.2256
luminosity
0.0797
mag
12.41
name
HIP 12031
spect
DAwe...
var amplitude
0.34
var designation
FS
var max
12.199
var min
12.539

About HIP 12031

HIP 12031 is a rare variable star. It lies about 299.2 light-years from Earth, sits in the constellation Cet, shines at apparent magnitude 12.41 and has spectral type DAwe....

Its spectrum reads DAwe... — a white dwarf — the exposed, Earth-sized cinder of a dead star, with nothing left to burn.

How to see it

Look for HIP 12031 in the constellation Cet. At apparent magnitude 12.41, it takes a larger telescope or a long-exposure image to capture.

Like any astronomical target, HIP 12031 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 HIP 12031 is a rare variable star

HIP 12031 scores 39 points on Spacedle's rarity scale, which places it in the rare tier. Another 11 points would lift it into a rarer tier.

That score comes from 5 science badges — Variable star, White dwarf (a burnt-out core), Blue-white star, Gently 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.