Uncommon star 31 EP

HIP 90600

RA 277.3097° · Dec -8.5614° · star

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Score breakdown

· 3 badges

31 pts · Uncommon

Uncommon 34 pts → Rare

Blazing O-type star +26
Star +3
Main-sequence star +2

Total score 31

3 more points to reach Rare.

Badges

Star · +3
Blazing O-type star · +26
Main-sequence star · +2

Trivia

Hard to believe

True brightness. It pours out about 1.6 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 O8.5V: — an O-type star — the hottest, rarest main class there is. Fewer than one star in a million is an O, and none of them lasts long.
Where it is in life. It is on the main sequence, quietly fusing hydrogen in its core exactly as the Sun does.

Find it in the sky

How to spot it. At magnitude 9.3 you'll want a small backyard telescope, over in Scutum.
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 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 0.9) — 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: -10.65
bv: 0.884
constellation: Sct
luminosity: 1584893.1925
mag: 9.35
name: HIP 90600
spect: O8.5V:

Nearby objects

About HIP 90600

HIP 90600 is an uncommon star. It sits in the constellation Sct, shines at apparent magnitude 9.35 and has spectral type O8.5V:.

Its spectrum reads O8.5V: — an O-type star — the hottest, rarest main class there is. Fewer than one star in a million is an O, and none of them lasts long.

How to see it

Look for HIP 90600 in the constellation Sct. At apparent magnitude 9.35, a small backyard telescope will bring it into view.

Like any astronomical target, HIP 90600 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 90600 is an uncommon star

HIP 90600 scores 31 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 3 points would lift it into a rarer tier.

That score comes from 3 science badges — Star, Blazing O-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.