About HD 236433
HD 236433 is an uncommon star. It sits in the constellation Cas, shines at apparent magnitude 8.85 and has spectral type F4II.
Its spectrum reads F4II — an F-type star — a little hotter, whiter and shorter-lived than the Sun.
Uncommon star 22 EP
HD 236433
RA 7.5250° · Dec 60.1511° · star
Score breakdown
· 4 badgesUncommon 34 pts → Rare
- Bright giant +12
- Never sets (northern circumpolar) +4
- Star +3
- Yellow-white F-type star +3
Total score 22
12 more points to reach Rare.
Badges
- Star · +3
- Never sets (northern circumpolar) · +4
- Yellow-white F-type star · +3
- Bright giant · +12
Trivia
Hard to believe
- True brightness. It pours out about 2.5 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 F4II — an F-type star — a little hotter, whiter and shorter-lived than the Sun.
- Where it is in life. It is a bright giant, well on its way to the largest stars there are.
Find it in the sky
- How to spot it. At magnitude 8.8 it is just past naked-eye reach — ordinary binoculars will pull it in, over in Cassiopeia.
- Never sets. So far north that from Britain, Canada or northern Europe it never dips below the horizon — it is up every clear night of the year.
- Best time of year. It stands highest in the middle of the night around September — that's when to go looking.
Its true colour
- Its true colour. Measured through blue and visual filters it comes out orange (B−V 0.9) — cooler than the Sun, and the kind of star that burns steadily for tens of billions of years.
- 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
- -11.15
- bv
- 0.885
- constellation
- Cas
- luminosity
- 2511886.4315
- mag
- 8.85
- name
- HD 236433
- spect
- F4II
How to see it
Look for HD 236433 in the constellation Cas. At apparent magnitude 8.85, it is an easy target for binoculars.
Like any astronomical target, HD 236433 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 236433 is an uncommon star
HD 236433 scores 22 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 12 points would lift it into a rarer tier.
That score comes from 4 science badges — Star, Never sets (northern circumpolar), Yellow-white F-type star and Bright giant — 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.