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Anomaly exoplanet 81 EP

Ross 128 b

RA 176.9376° · Dec 0.7993° · exoplanet

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Score breakdown

· 6 badges
81 pts · Anomaly
Anomaly 120 pts → Mythic
  • In the habitable zone +30
  • Earth-sized +16
  • Nearby (<25 ly) +12
  • Tidally locked +10
  • Orbits a red dwarf +8
  • Confirmed exoplanet +5
Total score 81

39 more points to reach Mythic.

Badges

  • Confirmed exoplanet · +5
  • Nearby (<25 ly) · +12
  • In the habitable zone · +30
  • Earth-sized · +16
  • Tidally locked · +10
  • Orbits a red dwarf · +8

Trivia

What makes it special

  • Goldilocks zone. Sits where it's neither too hot nor too cold — liquid water could exist on a surface here.
  • Earth-sized. Genuinely comparable to Earth in size. Worlds in this narrow band are the ones every next-generation telescope is being pointed at.

What it actually is

  • Hugging its star. It orbits closer to its star than Mercury does to the Sun, completing a lap in less time than Mercury takes.
  • What it is made of. Denser than Earth — a solid world of rock and iron, with no meaningful atmosphere to speak of by mass.
  • What the zone means. The habitable zone is only about temperature: it is the band where liquid water could survive on a surface. It is a promising address, not evidence of anything living.

Sense of scale

  • In perspective. Inside our stellar backyard: every radio broadcast humanity has ever made has already swept past it.

Find it in the sky

  • How to spot it. At magnitude 11.1 you'll want a small backyard telescope.
  • Seen from everywhere. It sits almost on the celestial equator, so it can be seen from essentially anywhere on Earth.

Properties

density gcc
5.63
diameter km
14159.382
discovery facility
La Silla Observatory
discovery method
Radial Velocity
discovery year
2017
dist ly
11.0063
eccentricity
0.116
eq temp k
301
habitable zone
yes
host star teff
3192
insolation
1.38
mag
11.12
mass earth
1.4
name
Ross 128 b
orbital period days
9.8658
radius earth
1.11
semi major au
0.0496
spect
M4
sys num planets
1
sys num stars
1
tidally locked
yes
tidally locked inferred
yes

About Ross 128 b

Ross 128 b is an anomaly exoplanet. It lies about 11 light-years from Earth, shines at apparent magnitude 11.12, has spectral type M4 and has an equilibrium temperature near 301 K.

Sits where it's neither too hot nor too cold — liquid water could exist on a surface here.

How to see it

At apparent magnitude 11.12, a small backyard telescope will bring it into view.

Like any astronomical target, Ross 128 b 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 Ross 128 b is an anomaly exoplanet

Ross 128 b scores 81 points on Spacedle's rarity scale, which places it in the anomaly tier. Another 39 points would lift it into a rarer tier.

That score comes from 6 science badges — Confirmed exoplanet, Nearby (<25 ly), In the habitable zone, Earth-sized, Tidally locked and Orbits a 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.