About HIP 45420
HIP 45420 is a trash star. It sits in the constellation Hya, shines at apparent magnitude 9.02 and has spectral type G5.
Its spectrum reads G5 — a G-type star: the very same spectral class as our own Sun.
Trash star 11 EP
HIP 45420
RA 138.8301° · Dec 5.5153° · star
Score breakdown
· 2 badgesTrash 15 pts → Common
- Sun-like G-type star +8
- Star +3
Total score 11
4 more points to reach Common.
Badges
- Star · +3
- Sun-like G-type star · +8
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 G5 — a G-type star: the very same spectral class as our own Sun.
Find it in the sky
- How to spot it. At magnitude 9 you'll want a small backyard telescope, over in Hydra.
- 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 February — that's when to go looking.
Its true colour
- Its true colour. Measured through blue and visual filters it comes out orange (B−V 0.8) — 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.
By the numbers
- Surface temperature. Its colour puts the surface at roughly 5230 K, against the Sun's 5778 K.
Properties
- absmag
- -10.98
- bv
- 0.818
- constellation
- Hya
- luminosity
- 2147830.4741
- mag
- 9.02
- name
- HIP 45420
- spect
- G5
How to see it
Look for HIP 45420 in the constellation Hya. At apparent magnitude 9.02, a small backyard telescope will bring it into view.
Like any astronomical target, HIP 45420 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 HIP 45420 is a trash star
HIP 45420 scores 11 points on Spacedle's rarity scale, which places it in the trash tier. Another 4 points would lift it into a rarer tier.
That score comes from 2 science badges — Star and Sun-like G-type 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.