Uncommon variable star 25 EP

HD 36412

RA 82.8267° · Dec -5.7038° · star

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Score breakdown

· 6 badges

25 pts · Uncommon

Uncommon 34 pts → Rare

In Orion's hunting ground +6
Variable star +5
White A-type star +5
Gently variable +4
A named variable star +3
Main-sequence star +2

Total score 25

9 more points to reach Rare.

Badges

Variable star · +5
In Orion's hunting ground · +6
White A-type star · +5
Main-sequence star · +2
Gently variable · +4
A named variable star · +3

Trivia

Hard to believe

True brightness. It pours out about 1.4 million 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 A7V — 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 on the main sequence, quietly fusing hydrogen in its core exactly as the Sun does.
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 9.5 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 yellow (B−V 0.7) — almost exactly the Sun's own shade — a stellar twin in colour, if not in size.

Properties

absmag: -10.54
bv: 0.746
constellation: Ori
luminosity: 1432187.8993
mag: 9.46
name: HD 36412
spect: A7V
var amplitude: 0.27
var designation: EY
var max: 9.435
var min: 9.705

Nearby objects

About HD 36412

HD 36412 is an uncommon variable star. It sits in the constellation Ori, shines at apparent magnitude 9.46 and has spectral type A7V.

Its spectrum reads A7V — 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 HD 36412 in the constellation Ori. At apparent magnitude 9.46, a small backyard telescope will bring it into view.

Like any astronomical target, HD 36412 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 36412 is an uncommon variable star

HD 36412 scores 25 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 9 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, Main-sequence 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.