Trash star 3 EP

HD 100509

RA 173.5344° · Dec 14.8914° · star

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Score breakdown

· 1 badge

3 pts · Trash

Trash 15 pts → Common

Star +3

Total score 3

12 more points to reach Common.

Badges

Star · +3

Trivia

Could we get there?

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

Getting there

Aboard Voyager 1. ≈ 4.9 million years at Voyager 1's speed (17 km/s).
Fastest probe ever. ≈ 431.9 thousand years even at the Parker Solar Probe's 192 km/s.
At 10% light speed. ≈ 2766 years in a starship at a tenth of light speed.
Distance. 277 light-years from Earth.

Look-back time

Look-back time. The light you'd see left around the year 1749.

Saying hello

Say hello. A radio message and its reply would take 553 years round-trip.

Properties

absmag: 3.968
bv: 0.57
constellation: Leo
dist ly: 276.6377
mag: 8.61
name: HD 100509
spect: G5

About HD 100509

HD 100509 is a trash star. It lies about 276.6 light-years from Earth, sits in the constellation Leo, shines at apparent magnitude 8.61 and has spectral type G5.

HD 100509 is a trash star worth 3 points across 1 science badge. Explore its facts, badges and place on the sky map, then add it to your dex on Spacedle.

How to see it

Look for HD 100509 in the constellation Leo. At apparent magnitude 8.61, it is an easy target for binoculars.

Like any astronomical target, HD 100509 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 100509 is a trash star

HD 100509 scores 3 points on Spacedle's rarity scale, which places it in the trash tier. Another 12 points would lift it into a rarer tier.

That score comes from 1 science badge — 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.