About HIP 89738
HIP 89738 is a trash star. It sits in the constellation CrA, shines at apparent magnitude 10.67 and has spectral type Gp.
Its spectrum reads Gp — a G-type star: the very same spectral class as our own Sun.
Trash star 11 EP
HIP 89738
RA 274.7129° · Dec -41.0132° · 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 461.3 thousand 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 Gp — a G-type star: the very same spectral class as our own Sun.
Find it in the sky
- How to spot it. At magnitude 10.7 you'll want a small backyard telescope, over in Corona Australis.
- 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 June — 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 5180 K, against the Sun's 5778 K.
Properties
- absmag
- -9.33
- bv
- 0.833
- constellation
- CrA
- luminosity
- 469894.1086
- mag
- 10.67
- name
- HIP 89738
- spect
- Gp
How to see it
Look for HIP 89738 in the constellation CrA. At apparent magnitude 10.67, a small backyard telescope will bring it into view.
Like any astronomical target, HIP 89738 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 89738 is a trash star
HIP 89738 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.