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Rare variable star 46 EP

HD 35155

RA 80.5777° · Dec -8.6661° · star

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Score breakdown

· 6 badges
46 pts · Rare
Rare 50 pts → Epic
  • S-type star (zirconium giant) +20
  • Deep red star +8
  • In Orion's hunting ground +6
  • Variable star +5
  • Gently variable +4
  • A named variable star +3
Total score 46

4 more points to reach Epic.

Badges

  • Variable star · +5
  • In Orion's hunting ground · +6
  • S-type star (zirconium giant) · +20
  • Deep red star · +8
  • Gently variable · +4
  • A named variable star · +3

Trivia

What it actually is

  • Spectral class. Its spectrum reads S41 — an S-type giant, its atmosphere laced with zirconium dredged up from the fusion going on below.
  • 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 6.8 it is just past naked-eye reach — ordinary binoculars will pull it in, over in Orion.
  • 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 December — 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. ≈ 16.5 million years at Voyager 1's speed (17 km/s).

Properties

absmag
-0.478
bv
1.8
constellation
Ori
dist ly
939.9307
luminosity
135.2695
mag
6.82
name
HD 35155
spect
S41
var amplitude
0.21
var designation
V1261
var max
6.718
var min
6.928

About HD 35155

HD 35155 is a rare variable star. It lies about 939.9 light-years from Earth, sits in the constellation Ori, shines at apparent magnitude 6.82 and has spectral type S41.

Its spectrum reads S41 — an S-type giant, its atmosphere laced with zirconium dredged up from the fusion going on below.

How to see it

Look for HD 35155 in the constellation Ori. At apparent magnitude 6.82, it is an easy target for binoculars.

Like any astronomical target, HD 35155 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 35155 is a rare variable star

HD 35155 scores 46 points on Spacedle's rarity scale, which places it in the rare tier. Another 4 points would lift it into a rarer tier.

That score comes from 6 science badges — Variable star, In Orion's hunting ground, S-type star (zirconium giant), Deep red 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.