Trash star 8 EP

HD 170691

RA 279.1209° · Dec -69.0819° · star

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Score breakdown

· 3 badges

8 pts · Trash

Trash 15 pts → Common

Star +3
Yellow-white F-type star +3
Main-sequence star +2

Total score 8

7 more points to reach Common.

Badges

Star · +3
Yellow-white F-type star · +3
Main-sequence star · +2

Trivia

What it actually is

Spectral class. Its spectrum reads F3V — an F-type star — a little hotter, whiter and shorter-lived than the Sun.
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 7.9 it is just past naked-eye reach — ordinary binoculars will pull it in, over in Pavo.
Southern sky only. So far south it never rises for most of the northern hemisphere. To see it you'd have to travel to Chile, South Africa or Australia.
Best time of year. It stands highest in the middle of the night around June — 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. ≈ 5.7 million years at Voyager 1's speed (17 km/s).

Properties

absmag: 2.944
bv: 0.398
constellation: Pav
dist ly: 322.6074
luminosity: 5.7863
mag: 7.92
name: HD 170691
spect: F3V

Nearby objects

About HD 170691

HD 170691 is a trash star. It lies about 322.6 light-years from Earth, sits in the constellation Pav, shines at apparent magnitude 7.92 and has spectral type F3V.

Its spectrum reads F3V — an F-type star — a little hotter, whiter and shorter-lived than the Sun.

How to see it

Look for HD 170691 in the constellation Pav. At apparent magnitude 7.92, it is an easy target for binoculars.

Like any astronomical target, HD 170691 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 170691 is a trash star

HD 170691 scores 8 points on Spacedle's rarity scale, which places it in the trash tier. Another 7 points would lift it into a rarer tier.

That score comes from 3 science badges — Star, Yellow-white F-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.