← Back to dex
Epic star 51 EP

HR 6716

RA 270.4766° · Dec -22.7803° · star

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

Computing the sky for your location…

Score breakdown

· 7 badges
51 pts · Epic
Epic 78 pts → Anomaly
  • Supergiant +18
  • Naked-eye visible +8
  • Toward the galactic centre +8
  • Hot blue B-type star +6
  • Blue-white star +5
  • Star +3
  • On the zodiac +3
Total score 51

27 more points to reach Anomaly.

Badges

  • Star · +3
  • Naked-eye visible · +8
  • Toward the galactic centre · +8
  • On the zodiac · +3
  • Hot blue B-type star · +6
  • Supergiant · +18
  • Blue-white star · +5

Trivia

What it actually is

  • Spectral class. Its spectrum reads B0Iab... — a blue-white B-type star, with a surface tens of thousands of degrees hot and a life measured in tens of millions of years.
  • Where it is in life. It is a supergiant. Drop it where the Sun is and its surface would engulf the inner planets.

Find it in the sky

  • How to spot it. At magnitude 5.7 you can see it with your own eyes from a dark site, over in Sagittarius.
  • Southern sky. It rides the southern half of the sky — an easier target the further south you are.
  • Best time of year. It stands highest in the middle of the night around June — that's when to go looking.

Its true colour

  • Its true colour. Measured through blue and visual filters it comes out blue-white (B−V -0) — the hallmark of a surface far hotter than the Sun's.
  • Why no green stars. No star ever looks green: a surface hot enough to peak in green also floods out plenty of red and blue, and your eye blends the mixture back to white.

By the numbers

  • Surface temperature. Its colour puts the surface at roughly 10520 K, against the Sun's 5778 K.

Properties

absmag
-14.28
bv
-0.03
constellation
Sgr
luminosity
44874538.9933
mag
5.72
name
HR 6716
spect
B0Iab...

About HR 6716

HR 6716 is an epic star. It sits in the constellation Sgr, shines at apparent magnitude 5.72 and has spectral type B0Iab....

Its spectrum reads B0Iab... — a blue-white B-type star, with a surface tens of thousands of degrees hot and a life measured in tens of millions of years.

How to see it

Look for HR 6716 in the constellation Sgr. At apparent magnitude 5.72, it can be glimpsed with the unaided eye under dark skies.

Like any astronomical target, HR 6716 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 HR 6716 is an epic star

HR 6716 scores 51 points on Spacedle's rarity scale, which places it in the epic tier. Another 27 points would lift it into a rarer tier.

That score comes from 7 science badges — Star, Naked-eye visible, Toward the galactic centre, On the zodiac, Hot blue B-type star, Supergiant and Blue-white 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.