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Uncommon variable star 23 EP

HR 710

RA 36.5015° · Dec -15.3412° · star

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Score breakdown

· 5 badges
23 pts · Uncommon
Uncommon 34 pts → Rare
  • Naked-eye visible +8
  • Variable star +5
  • White A-type star +5
  • A named variable star +3
  • Barely variable (under 0.05 mag) +2
Total score 23

11 more points to reach Rare.

Badges

  • Variable star · +5
  • Naked-eye visible · +8
  • White A-type star · +5
  • Barely variable (under 0.05 mag) · +2
  • A named variable star · +3

Trivia

What it actually is

  • Spectral class. Its spectrum reads Ap SrCrEu — 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.
  • 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 5.9 you can see it with your own eyes from a dark site, over in Cetus.
  • 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 October — 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. ≈ 4.4 million years at Voyager 1's speed (17 km/s).

Properties

absmag
1.446
bv
0.116
constellation
Cet
dist ly
251.2758
luminosity
22.9932
mag
5.88
name
HR 710
spect
Ap SrCrEu
var amplitude
0.04
var designation
AB
var max
5.869
var min
5.909

About HR 710

HR 710 is an uncommon variable star. It lies about 251.3 light-years from Earth, sits in the constellation Cet, shines at apparent magnitude 5.88 and has spectral type Ap SrCrEu.

Its spectrum reads Ap SrCrEu — 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 710 in the constellation Cet. At apparent magnitude 5.88, it can be glimpsed with the unaided eye under dark skies.

Like any astronomical target, HR 710 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 710 is an uncommon variable star

HR 710 scores 23 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 11 points would lift it into a rarer tier.

That score comes from 5 science badges — Variable star, Naked-eye visible, White A-type 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.