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Uncommon star 22 EP

HR 728

RA 37.6348° · Dec 25.2350° · star

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Score breakdown

· 5 badges
22 pts · Uncommon
Uncommon 34 pts → Rare
  • Naked-eye visible +8
  • Subgiant (leaving the main sequence) +5
  • Star +3
  • On the zodiac +3
  • Yellow-white F-type star +3
Total score 22

12 more points to reach Rare.

Badges

  • Star · +3
  • Naked-eye visible · +8
  • On the zodiac · +3
  • Yellow-white F-type star · +3
  • Subgiant (leaving the main sequence) · +5

Trivia

What it actually is

  • Spectral class. Its spectrum reads F6IV — an F-type star — a little hotter, whiter and shorter-lived than the Sun.
  • Where it is in life. It is a subgiant, caught in the act of leaving the main sequence as the hydrogen in its core runs out.

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 Aries.
  • Northern sky. It rides the northern half of the sky — an easier target the further north 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. ≈ 3 million years at Voyager 1's speed (17 km/s).

Properties

absmag
2.31
bv
0.412
constellation
Ari
dist ly
168.8177
luminosity
10.3753
mag
5.88
name
HR 728
spect
F6IV

About HR 728

HR 728 is an uncommon star. It lies about 168.8 light-years from Earth, sits in the constellation Ari, shines at apparent magnitude 5.88 and has spectral type F6IV.

Its spectrum reads F6IV — an F-type star — a little hotter, whiter and shorter-lived than the Sun.

How to see it

Look for HR 728 in the constellation Ari. At apparent magnitude 5.88, it can be glimpsed with the unaided eye under dark skies.

Like any astronomical target, HR 728 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 728 is an uncommon star

HR 728 scores 22 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 12 points would lift it into a rarer tier.

That score comes from 5 science badges — Star, Naked-eye visible, On the zodiac, Yellow-white F-type star and Subgiant (leaving the main sequence) — 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.