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Trash star 14 EP

HD 183736

RA 292.7498° · Dec -2.0347° · star

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Score breakdown

· 3 badges
14 pts · Trash
Trash 15 pts → Common
  • Deep red star +8
  • Star +3
  • Orange K-type star +3
Total score 14

1 more point to reach Common.

Badges

  • Star · +3
  • Orange K-type star · +3
  • Deep red star · +8

Trivia

What it actually is

  • Spectral class. Its spectrum reads K5 — a K-type star. Orange K dwarfs are the marathon runners of the galaxy, burning steadily for tens of billions of years.

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 Aquila.
  • Seen from everywhere. It sits almost on the celestial equator, so it can be seen from essentially anywhere on Earth.
  • Best time of year. It stands highest in the middle of the night around July — that's when to go looking.

Its true colour

  • Its true colour. Measured through blue and visual filters it comes out deep orange-red (B−V 1.9) — one of the coolest surfaces a star can have while still fusing.

By the numbers

  • Surface temperature. Its colour puts the surface at roughly 3300 K, against the Sun's 5778 K.

What's in a name

  • Its catalogue. The HD number is from the Henry Draper Catalogue, in which Annie Jump Cannon personally classified the spectra of nearly 400,000 stars — still the largest such feat by one person.

Properties

absmag
-12.27
bv
1.877
constellation
Aql
luminosity
7046930.6897
mag
7.73
name
HD 183736
spect
K5

Nearby objects

About HD 183736

HD 183736 is a trash star. It sits in the constellation Aql, shines at apparent magnitude 7.73 and has spectral type K5.

Its spectrum reads K5 — a K-type star. Orange K dwarfs are the marathon runners of the galaxy, burning steadily for tens of billions of years.

How to see it

Look for HD 183736 in the constellation Aql. At apparent magnitude 7.73, it is an easy target for binoculars.

Like any astronomical target, HD 183736 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 183736 is a trash star

HD 183736 scores 14 points on Spacedle's rarity scale, which places it in the trash tier. Another 1 point would lift it into a rarer tier.

That score comes from 3 science badges — Star, Orange K-type star and Deep red 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.