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Rare variable star 38 EP

HR 2554

RA 102.4638° · Dec -53.6224° · star

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Score breakdown

· 6 badges
38 pts · Rare
Rare 50 pts → Epic
  • Bright giant +12
  • Naked-eye visible +8
  • Sun-like G-type star +8
  • Variable star +5
  • A named variable star +3
  • Barely variable (under 0.05 mag) +2
Total score 38

12 more points to reach Epic.

Badges

  • Variable star · +5
  • Naked-eye visible · +8
  • Sun-like G-type star · +8
  • Bright giant · +12
  • Barely variable (under 0.05 mag) · +2
  • A named variable star · +3

Trivia

What it actually is

  • Spectral class. Its spectrum reads G6II — a G-type star: the very same spectral class as our own Sun.
  • 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.

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 4.4 you can see it with your own eyes from a dark site, over in Carina.
  • 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 January — that's when to go looking.

Could we get there?

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

Properties

absmag
-1.703
bv
0.899
constellation
Car
dist ly
544.5008
luminosity
418.0228
mag
4.41
name
HR 2554
spect
G6II
var amplitude
0.02
var designation
V415
var max
4.402
var min
4.422

About HR 2554

HR 2554 is a rare variable star. It lies about 544.5 light-years from Earth, sits in the constellation Car, shines at apparent magnitude 4.41 and has spectral type G6II.

Its spectrum reads G6II — a G-type star: the very same spectral class as our own Sun.

How to see it

Look for HR 2554 in the constellation Car. At apparent magnitude 4.41, it can be glimpsed with the unaided eye under dark skies.

Like any astronomical target, HR 2554 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 2554 is a rare variable star

HR 2554 scores 38 points on Spacedle's rarity scale, which places it in the rare tier. Another 12 points would lift it into a rarer tier.

That score comes from 6 science badges — Variable star, Naked-eye visible, Sun-like G-type star, Bright giant, 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.