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Uncommon star 32 EP

HR 3967

RA 150.7059° · Dec -62.1567° · star

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Score breakdown

· 4 badges
32 pts · Uncommon
Uncommon 34 pts → Rare
  • Supergiant +18
  • Deep red star +8
  • Star +3
  • Orange K-type star +3
Total score 32

2 more points to reach Rare.

Badges

  • Star · +3
  • Orange K-type star · +3
  • Supergiant · +18
  • Deep red star · +8

Trivia

What it actually is

  • Spectral class. Its spectrum reads K3Ib — a K-type star. Orange K dwarfs are the marathon runners of the galaxy, burning steadily for tens of billions of years.
  • Where it is in life. It is a supergiant, hundreds of times wider than the Sun.

Find it in the sky

  • How to spot it. At magnitude 6.4 it is just past naked-eye reach — ordinary binoculars will pull it in, over in Carina.
  • 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 February — 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 1.7) — one of the coolest surfaces a star can have while still fusing.

By the numbers

  • Surface temperature. Its colour puts the surface at roughly 3530 K, against the Sun's 5778 K.

What's in a name

  • Its catalogue. The HR number is from the Bright Star Catalogue — roughly 9,100 stars, essentially everything the unaided eye can see.

Properties

absmag
-13.59
bv
1.688
constellation
Car
luminosity
23768402.8662
mag
6.41
name
HR 3967
spect
K3Ib

About HR 3967

HR 3967 is an uncommon star. It sits in the constellation Car, shines at apparent magnitude 6.41 and has spectral type K3Ib.

Its spectrum reads K3Ib — 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 HR 3967 in the constellation Car. At apparent magnitude 6.41, it is an easy target for binoculars.

Like any astronomical target, HR 3967 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 3967 is an uncommon star

HR 3967 scores 32 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 2 points would lift it into a rarer tier.

That score comes from 4 science badges — Star, Orange K-type star, Supergiant 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.