Trash star 10 EP

HD 90557

RA 156.7126° · Dec -30.0729° · star

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Score breakdown

· 3 badges

10 pts · Trash

Trash 15 pts → Common

White A-type star +5
Star +3
Main-sequence star +2

Total score 10

5 more points to reach Common.

Badges

Star · +3
White A-type star · +5
Main-sequence star · +2

Trivia

What it actually is

Spectral class. Its spectrum reads A1V — 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.
Where it is in life. It is on the main sequence, quietly fusing hydrogen in its core exactly as the Sun does.

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 8.3 it is just past naked-eye reach — ordinary binoculars will pull it in, over in Antlia.
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 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. ≈ 11.2 million years at Voyager 1's speed (17 km/s).

Properties

absmag: 1.851
bv: 0.06
constellation: Ant
dist ly: 635.7818
luminosity: 15.8343
mag: 8.3
name: HD 90557
spect: A1V

Nearby objects

About HD 90557

HD 90557 is a trash star. It lies about 635.8 light-years from Earth, sits in the constellation Ant, shines at apparent magnitude 8.3 and has spectral type A1V.

Its spectrum reads A1V — 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 HD 90557 in the constellation Ant. At apparent magnitude 8.3, it is an easy target for binoculars.

Like any astronomical target, HD 90557 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 HD 90557 is a trash star

HD 90557 scores 10 points on Spacedle's rarity scale, which places it in the trash tier. Another 5 points would lift it into a rarer tier.

That score comes from 3 science badges — Star, White A-type star and Main-sequence 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.