Trash star 12 EP

HIP 7648

RA 24.6268° · Dec -73.6589° · star

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Score breakdown

· 3 badges

12 pts · Trash

Trash 15 pts → Common

Giant star +6
Star +3
Orange K-type star +3

Total score 12

3 more points to reach Common.

Badges

Star · +3
Orange K-type star · +3
Giant star · +6

Trivia

Hard to believe

True brightness. It pours out about 465.6 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 K0III — a K-type star. Orange K dwarfs are the marathon runners of the galaxy, burning steadily for tens of billions of years.
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 10.7 you'll want a small backyard telescope, over in Hydrus.
Southern sky only. So far south it never rises for most of the northern hemisphere. To see it you'd have to travel to Chile, South Africa or Australia.
Best time of year. It stands highest in the middle of the night around October — 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) — 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: -9.34
bv: 0.98
constellation: Hyi
luminosity: 474241.9853
mag: 10.66
name: HIP 7648
spect: K0III

Nearby objects

About HIP 7648

HIP 7648 is a trash star. It sits in the constellation Hyi, shines at apparent magnitude 10.66 and has spectral type K0III.

Its spectrum reads K0III — a K-type star. Orange K dwarfs are the marathon runners of the galaxy, burning steadily for tens of billions of years.

How to see it

Look for HIP 7648 in the constellation Hyi. At apparent magnitude 10.66, a small backyard telescope will bring it into view.

Like any astronomical target, HIP 7648 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 7648 is a trash star

HIP 7648 scores 12 points on Spacedle's rarity scale, which places it in the trash tier. Another 3 points would lift it into a rarer tier.

That score comes from 3 science badges — Star, Orange K-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.