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Epic variable star 51 EP

HIP 26403

RA 84.3053° · Dec -6.5835° · star

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Score breakdown

· 6 badges
51 pts · Epic
Epic 78 pts → Anomaly
  • Dramatic variable (over 2 magnitudes) +20
  • Bright giant +12
  • In Orion's hunting ground +6
  • Variable star +5
  • White A-type star +5
  • A named variable star +3
Total score 51

27 more points to reach Anomaly.

Badges

  • Variable star · +5
  • In Orion's hunting ground · +6
  • White A-type star · +5
  • Bright giant · +12
  • Dramatic variable (over 2 magnitudes) · +20
  • A named variable star · +3

Trivia

Hard to believe

  • True brightness. It pours out about 779.8 thousand times as much light as the Sun. It only looks ordinary because it is so far away.

What it actually is

  • Spectral class. Its spectrum reads A5II-IIIeva — an A-type star: white-hot, typically about twice the Sun's mass, and the class most of the sky's famous bright stars belong to.
  • Where it is in life. It is a bright giant, well on its way to the largest stars there are.
  • 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.

Find it in the sky

  • How to spot it. At magnitude 10.1 you'll want a small backyard telescope, 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.

Its true colour

  • Its true colour. Measured through blue and visual filters it comes out brilliant white (B−V 0.3) — hotter and whiter than the Sun, the colour of Sirius or Vega.

Properties

absmag
-9.9
bv
0.276
constellation
Ori
luminosity
794328.2347
mag
10.1
name
HIP 26403
spect
A5II-IIIeva
var amplitude
2.49
var designation
BF
var max
9.623
var min
12.113

About HIP 26403

HIP 26403 is an epic variable star. It sits in the constellation Ori, shines at apparent magnitude 10.1 and has spectral type A5II-IIIeva.

Its spectrum reads A5II-IIIeva — an A-type star: white-hot, typically about twice the Sun's mass, and the class most of the sky's famous bright stars belong to.

How to see it

Look for HIP 26403 in the constellation Ori. At apparent magnitude 10.1, a small backyard telescope will bring it into view.

Like any astronomical target, HIP 26403 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 26403 is an epic variable star

HIP 26403 scores 51 points on Spacedle's rarity scale, which places it in the epic tier. Another 27 points would lift it into a rarer tier.

That score comes from 6 science badges — Variable star, In Orion's hunting ground, White A-type star, Bright giant, Dramatic variable (over 2 magnitudes) 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.