About HD 243335
HD 243335 is an uncommon star. It sits in the constellation Ori, shines at apparent magnitude 9.02 and has spectral type G0III.
Its spectrum reads G0III — a G-type star: the very same spectral class as our own Sun.
Uncommon star 23 EP
HD 243335
RA 81.0844° · Dec 14.3879° · star
Score breakdown
· 4 badgesUncommon 34 pts → Rare
- Sun-like G-type star +8
- In Orion's hunting ground +6
- Giant star +6
- Star +3
Total score 23
11 more points to reach Rare.
Badges
- Star · +3
- In Orion's hunting ground · +6
- Sun-like G-type star · +8
- Giant star · +6
Trivia
Hard to believe
- True brightness. It pours out about 2.1 million times as much light as the Sun. It only looks ordinary because it is so far away.
What it actually is
- Spectral class. Its spectrum reads G0III — 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 9 you'll want a small backyard telescope, over in Orion.
- Northern sky. It rides the northern half of the sky — an easier target the further north you are.
- 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 yellow (B−V 0.6) — almost exactly the Sun's own shade — a stellar twin in colour, if not in size.
- 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.
Properties
- absmag
- -10.98
- bv
- 0.58
- constellation
- Ori
- luminosity
- 2147830.4741
- mag
- 9.02
- name
- HD 243335
- spect
- G0III
How to see it
Look for HD 243335 in the constellation Ori. At apparent magnitude 9.02, a small backyard telescope will bring it into view.
Like any astronomical target, HD 243335 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 243335 is an uncommon star
HD 243335 scores 23 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 11 points would lift it into a rarer tier.
That score comes from 4 science badges — Star, 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.