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Common star 16 EP

HR 4025

RA 153.3778° · Dec -66.3728° · star

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Score breakdown

· 3 badges
16 pts · Common
Common 22 pts → Uncommon
  • Naked-eye visible +8
  • White A-type star +5
  • Star +3
Total score 16

6 more points to reach Uncommon.

Badges

  • Star · +3
  • Naked-eye visible · +8
  • White A-type star · +5

Trivia

What it actually is

  • Spectral class. Its spectrum reads Am — 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.

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 Carina.
  • Southern sky only. So far south it never rises for most of the northern hemisphere. To see it you'd have to travel to Chile, South Africa or Australia.
  • Best time of year. It stands highest in the middle of the night around February — 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. ≈ 5.4 million years at Voyager 1's speed (17 km/s).
  • Fastest probe ever. ≈ 480.4 thousand years even at the Parker Solar Probe's 192 km/s.

Properties

absmag
0.277
bv
0.217
constellation
Car
dist ly
307.6943
luminosity
67.4839
mag
5.15
name
HR 4025
spect
Am

About HR 4025

HR 4025 is a common star. It lies about 307.7 light-years from Earth, sits in the constellation Car, shines at apparent magnitude 5.15 and has spectral type Am.

Its spectrum reads Am — 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 4025 in the constellation Car. At apparent magnitude 5.15, it can be glimpsed with the unaided eye under dark skies.

Like any astronomical target, HR 4025 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 4025 is a common star

HR 4025 scores 16 points on Spacedle's rarity scale, which places it in the common tier. Another 6 points would lift it into a rarer tier.

That score comes from 3 science badges — Star, Naked-eye visible and White A-type 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.