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Common star 19 EP

HIP 102115

RA 310.4196° · Dec -5.4928° · star

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Score breakdown

· 5 badges
19 pts · Common
Common 22 pts → Uncommon
  • Red dwarf +6
  • Cool red M-type star +5
  • Star +3
  • On the zodiac +3
  • Main-sequence star +2
Total score 19

3 more points to reach Uncommon.

Badges

  • Star · +3
  • On the zodiac · +3
  • Cool red M-type star · +5
  • Main-sequence star · +2
  • Red dwarf · +6

Trivia

What it actually is

  • Spectral class. Its spectrum reads M1V: — an M-type red star — and M stars are the silent majority: roughly three of every four stars in the galaxy are one.
  • Where it is in life. It is on the main sequence, quietly fusing hydrogen in its core exactly as the Sun does.

Sense of scale

  • In perspective. Far away by human standards, yet still a local address inside the Milky Way's spiral arms.

Find it in the sky

  • How to spot it. At magnitude 10.5 you'll want a small backyard telescope, over in Aquarius.
  • 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 July — that's when to go looking.

Could we get there?

  • Verdict. Hopelessly far for any craft humanity can build today.

Getting there

  • Aboard Voyager 1. ≈ 1.8 million years at Voyager 1's speed (17 km/s).

Properties

absmag
8.024
bv
1.318
constellation
Aqr
dist ly
103.443
luminosity
0.0538
mag
10.53
name
HIP 102115
spect
M1V:

About HIP 102115

HIP 102115 is a common star. It lies about 103.4 light-years from Earth, sits in the constellation Aqr, shines at apparent magnitude 10.53 and has spectral type M1V:.

Its spectrum reads M1V: — 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 102115 in the constellation Aqr. At apparent magnitude 10.53, a small backyard telescope will bring it into view.

Like any astronomical target, HIP 102115 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 102115 is a common star

HIP 102115 scores 19 points on Spacedle's rarity scale, which places it in the common tier. Another 3 points would lift it into a rarer tier.

That score comes from 5 science badges — Star, On the zodiac, Cool red M-type star, Main-sequence 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.