About 66 Ori
66 Ori is an uncommon star. It sits in the constellation Ori, shines at apparent magnitude 5.63 and has spectral type G4III.
Its spectrum reads G4III — a G-type star: the very same spectral class as our own Sun.
Uncommon star 31 EP
66 Ori
RA 91.2432° · Dec 4.1587° · star
Score breakdown
· 5 badgesUncommon 34 pts → Rare
- Naked-eye visible +8
- Sun-like G-type star +8
- In Orion's hunting ground +6
- Giant star +6
- Star +3
Total score 31
3 more points to reach Rare.
Badges
- Star · +3
- Naked-eye visible · +8
- In Orion's hunting ground · +6
- Sun-like G-type star · +8
- Giant star · +6
Trivia
What it actually is
- Spectral class. Its spectrum reads G4III — a G-type star: the very same spectral class as our own Sun.
- Where it is in life. It is a giant. It has already exhausted its core hydrogen and swollen up enormously in response.
Find it in the sky
- How to spot it. At magnitude 5.6 you can see it with your own eyes from a dark site, over in Orion.
- 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 December — that's when to go looking.
Its true colour
- Its true colour. Measured through blue and visual filters it comes out orange (B−V 1) — cooler than the Sun, and the kind of star that burns steadily for tens of billions of years.
By the numbers
- Surface temperature. Its colour puts the surface at roughly 4650 K, against the Sun's 5778 K.
Properties
- absmag
- -14.37
- bv
- 1.041
- constellation
- Ori
- luminosity
- 48752849.0103
- mag
- 5.63
- name
- 66 Ori
- spect
- G4III
How to see it
Look for 66 Ori in the constellation Ori. At apparent magnitude 5.63, it can be glimpsed with the unaided eye under dark skies.
Like any astronomical target, 66 Ori 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 66 Ori is an uncommon star
66 Ori scores 31 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 3 points would lift it into a rarer tier.
That score comes from 5 science badges — Star, Naked-eye visible, In Orion's hunting ground, Sun-like G-type star and Giant 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.