About HD 222434
HD 222434 is a trash star. It sits in the constellation Scl, shines at apparent magnitude 8.82 and has spectral type G2/G3V.
Its spectrum reads G2/G3V — a G-type star: the very same spectral class as our own Sun.
Trash star 13 EP
HD 222434
RA 355.1730° · Dec -34.6963° · star
Score breakdown
· 3 badgesTrash 15 pts → Common
- Sun-like G-type star +8
- Star +3
- Main-sequence star +2
Total score 13
2 more points to reach Common.
Badges
- Star · +3
- Sun-like G-type star · +8
- Main-sequence star · +2
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 G2/G3V — a G-type star: the very same spectral class as our own Sun.
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 Sculptor.
- 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 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 1.1) — 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 4560 K, against the Sun's 5778 K.
What's in a name
- Its catalogue. The HD number is from the Henry Draper Catalogue, in which Annie Jump Cannon personally classified the spectra of nearly 400,000 stars — still the largest such feat by one person.
Properties
- absmag
- -11.18
- bv
- 1.08
- constellation
- Scl
- luminosity
- 2582260.1906
- mag
- 8.82
- name
- HD 222434
- spect
- G2/G3V
How to see it
Look for HD 222434 in the constellation Scl. At apparent magnitude 8.82, it is an easy target for binoculars.
Like any astronomical target, HD 222434 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 222434 is a trash star
HD 222434 scores 13 points on Spacedle's rarity scale, which places it in the trash tier. Another 2 points would lift it into a rarer tier.
That score comes from 3 science badges — Star, Sun-like G-type star and Main-sequence 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.