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Common variable star 17 EP

HR 7366

RA 291.2564° · Dec -4.8845° · star

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Score breakdown

· 5 badges
17 pts · Common
Common 22 pts → Uncommon
  • Variable star +5
  • White A-type star +5
  • A named variable star +3
  • Main-sequence star +2
  • Barely variable (under 0.05 mag) +2
Total score 17

5 more points to reach Uncommon.

Badges

  • Variable star · +5
  • White A-type star · +5
  • Main-sequence star · +2
  • Barely variable (under 0.05 mag) · +2
  • A named variable star · +3

Trivia

What it actually is

  • Spectral class. Its spectrum reads A9V — 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.

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 6.5 it is just past naked-eye reach — ordinary binoculars will pull it in, over in Aquila.
  • 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 July — that's when to go looking.

Could we get there?

  • Verdict. Hopelessly far for any craft humanity can build today.

Properties

absmag
1.331
bv
0.34
constellation
Aql
dist ly
352.6011
luminosity
25.5623
mag
6.5
name
HR 7366
spect
A9V
var amplitude
0.03
var designation
V1691
var max
6.486
var min
6.516

About HR 7366

HR 7366 is a common variable star. It lies about 352.6 light-years from Earth, sits in the constellation Aql, shines at apparent magnitude 6.5 and has spectral type A9V.

Its spectrum reads A9V — 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 HR 7366 in the constellation Aql. At apparent magnitude 6.5, it is an easy target for binoculars.

Like any astronomical target, HR 7366 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 HR 7366 is a common variable star

HR 7366 scores 17 points on Spacedle's rarity scale, which places it in the common tier. Another 5 points would lift it into a rarer tier.

That score comes from 5 science badges — Variable star, White A-type star, Main-sequence star, Barely variable (under 0.05 mag) 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.