← Back to dex
Trash star 12 EP

HD 99620

RA 172.0478° · Dec 55.6682° · star

Loading sky survey…
🌌 View in 3D star map
Tonight’s visibility

Computing the sky for your location…

Score breakdown

· 3 badges
12 pts · Trash
Trash 15 pts → Common
  • White A-type star +5
  • Never sets (northern circumpolar) +4
  • Star +3
Total score 12

3 more points to reach Common.

Badges

  • Star · +3
  • Never sets (northern circumpolar) · +4
  • 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 7.7 it is just past naked-eye reach — ordinary binoculars will pull it in, over in Ursa Major.
  • 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 March — 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. ≈ 6.4 million years at Voyager 1's speed (17 km/s).
  • Fastest probe ever. ≈ 570.9 thousand years even at the Parker Solar Probe's 192 km/s.

Properties

absmag
2.422
bv
0.23
constellation
UMa
dist ly
365.6457
luminosity
9.3584
mag
7.67
name
HD 99620
spect
Am

About HD 99620

HD 99620 is a trash star. It lies about 365.6 light-years from Earth, sits in the constellation UMa, shines at apparent magnitude 7.67 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 HD 99620 in the constellation UMa. At apparent magnitude 7.67, it is an easy target for binoculars.

Like any astronomical target, HD 99620 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 99620 is a trash star

HD 99620 scores 12 points on Spacedle's rarity scale, which places it in the trash tier. Another 3 points would lift it into a rarer tier.

That score comes from 3 science badges — Star, Never sets (northern circumpolar) 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.