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Trash star 3 EP

HD 138255

RA 233.1176° · Dec -41.5648° · 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. ≈ 6.2 million years at Voyager 1's speed (17 km/s).
  • Fastest probe ever. ≈ 550 thousand years even at the Parker Solar Probe's 192 km/s.
  • At 10% light speed. ≈ 3522 years in a starship at a tenth of light speed.
  • Distance. 352 light-years from Earth.

Look-back time

  • Look-back time. The light you'd see left around the year 1674.

Saying hello

  • Say hello. A radio message and its reply would take 704 years round-trip.

Properties

absmag
3.133
bv
0.48
constellation
Lup
dist ly
352.2204
mag
8.3
name
HD 138255
spect
F5V

About HD 138255

HD 138255 is a trash star. It lies about 352.2 light-years from Earth, sits in the constellation Lup, shines at apparent magnitude 8.3 and has spectral type F5V.

HD 138255 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 138255 in the constellation Lup. At apparent magnitude 8.3, it is an easy target for binoculars.

Like any astronomical target, HD 138255 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 138255 is a trash star

HD 138255 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.

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Sky imagery and survey data courtesy of Aladin Lite & CDS, Strasbourg. Object data from the NASA Exoplanet Archive, JPL Small-Body Database, and the ATNF Pulsar Catalogue.