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Rare variable star 37 EP

HIP 90259

RA 276.2553° · Dec -19.5573° · star

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Score breakdown

· 6 badges
37 pts · Rare
Rare 50 pts → Epic
  • Strongly variable +10
  • Toward the galactic centre +8
  • Deep red star +8
  • Variable star +5
  • On the zodiac +3
  • A named variable star +3
Total score 37

13 more points to reach Epic.

Badges

  • Variable star · +5
  • Toward the galactic centre · +8
  • On the zodiac · +3
  • Deep red star · +8
  • Strongly variable · +10
  • A named variable star · +3

Trivia

What it actually is

  • 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 10.7 you'll want a small backyard telescope, over in Sagittarius.
  • 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 June — 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. ≈ 6.6 million years at Voyager 1's speed (17 km/s).
  • Fastest probe ever. ≈ 589.4 thousand years even at the Parker Solar Probe's 192 km/s.

Properties

absmag
5.333
bv
1.86
constellation
Sgr
dist ly
377.4952
luminosity
0.6409
mag
10.65
name
HIP 90259
var amplitude
0.54
var designation
V4394
var max
10.43
var min
10.97

About HIP 90259

HIP 90259 is a rare variable star. It lies about 377.5 light-years from Earth, sits in the constellation Sgr and shines at apparent magnitude 10.65.

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.

How to see it

Look for HIP 90259 in the constellation Sgr. At apparent magnitude 10.65, a small backyard telescope will bring it into view.

Like any astronomical target, HIP 90259 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 90259 is a rare variable star

HIP 90259 scores 37 points on Spacedle's rarity scale, which places it in the rare tier. Another 13 points would lift it into a rarer tier.

That score comes from 6 science badges — Variable star, Toward the galactic centre, On the zodiac, 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.