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Uncommon variable star 29 EP

Rho Phe

RA 12.6715° · Dec -50.9868° · star

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Score breakdown

· 6 badges
29 pts · Uncommon
Uncommon 34 pts → Rare
  • Naked-eye visible +8
  • Giant star +6
  • Variable star +5
  • Gently variable +4
  • Yellow-white F-type star +3
  • A named variable star +3
Total score 29

5 more points to reach Rare.

Badges

  • Variable star · +5
  • Naked-eye visible · +8
  • Yellow-white F-type star · +3
  • Giant star · +6
  • Gently variable · +4
  • A named variable star · +3

Trivia

What it actually is

  • Spectral class. Its spectrum reads F2III — an F-type star — a little hotter, whiter and shorter-lived than the Sun.
  • Where it is in life. It is a giant. It has already exhausted its core hydrogen and swollen up enormously in response.
  • 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 5.2 you can see it with your own eyes from a dark site, over in Phoenix.
  • 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.

Properties

absmag
0.887
bv
0.356
constellation
Phe
dist ly
242.135
luminosity
38.4769
mag
5.24
name
Rho Phe
spect
F2III
var amplitude
0.07
var designation
Rho
var max
5.209
var min
5.279

About Rho Phe

Rho Phe is an uncommon variable star. It lies about 242.1 light-years from Earth, sits in the constellation Phe, shines at apparent magnitude 5.24 and has spectral type F2III.

Its spectrum reads F2III — an F-type star — a little hotter, whiter and shorter-lived than the Sun.

How to see it

Look for Rho Phe in the constellation Phe. At apparent magnitude 5.24, it can be glimpsed with the unaided eye under dark skies.

Like any astronomical target, Rho Phe 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 Rho Phe is an uncommon variable star

Rho Phe scores 29 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 5 points would lift it into a rarer tier.

That score comes from 6 science badges — Variable star, Naked-eye visible, Yellow-white F-type star, Giant 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.