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Trash star 14 EP

HIP 115718

RA 351.6650° · Dec 15.1462° · star

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Score breakdown

· 3 badges
14 pts · Trash
Trash 15 pts → Common
  • Red dwarf +6
  • Cool red M-type star +5
  • Star +3
Total score 14

1 more point to reach Common.

Badges

  • Star · +3
  • Cool red M-type star · +5
  • Red dwarf · +6

Trivia

Hard to believe

  • True brightness. It pours out about 1.3 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 M0... — an M-type red star — and M stars are the silent majority: roughly three of every four stars in the galaxy are one.

Find it in the sky

  • How to spot it. At magnitude 9.6 you'll want a small backyard telescope, over in Pegasus.
  • Northern sky. It rides the northern half of the sky — an easier target the further north 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 1.4) — 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 4020 K, against the Sun's 5778 K.

What's in a name

  • Its catalogue. The HIP number comes from Hipparcos, the ESA satellite that between 1989 and 1993 pinned down 118,000 stars precisely enough to triangulate their distances.

Properties

absmag
-10.44
bv
1.359
constellation
Peg
luminosity
1306170.8881
mag
9.56
name
HIP 115718
spect
M0...

About HIP 115718

HIP 115718 is a trash star. It sits in the constellation Peg, shines at apparent magnitude 9.56 and has spectral type M0....

Its spectrum reads M0... — an M-type red star — and M stars are the silent majority: roughly three of every four stars in the galaxy are one.

How to see it

Look for HIP 115718 in the constellation Peg. At apparent magnitude 9.56, a small backyard telescope will bring it into view.

Like any astronomical target, HIP 115718 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 115718 is a trash star

HIP 115718 scores 14 points on Spacedle's rarity scale, which places it in the trash tier. Another 1 point would lift it into a rarer tier.

That score comes from 3 science badges — Star, Cool red M-type star and Red dwarf — 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.