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Rare exoplanet 41 EP

TrES-1 b

RA 286.0409° · Dec 36.6325° · exoplanet

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Score breakdown

· 5 badges
41 pts · Rare
Rare 50 pts → Epic
  • Two suns in its sky +12
  • Hot Jupiter +10
  • Tidally locked +10
  • Confirmed exoplanet +5
  • Gas giant +4
Total score 41

9 more points to reach Epic.

Badges

  • Confirmed exoplanet · +5
  • Gas giant · +4
  • Hot Jupiter · +10
  • Tidally locked · +10
  • Two suns in its sky · +12

Trivia

Hard to believe

  • It would float. It is less dense than water. Drop it in a big enough ocean and the whole world would bob on the surface.

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. Lighter than Neptune — a puffed-up ball of hydrogen and helium with no surface anywhere on it to stand on.

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 11.4 you'll want a small backyard telescope.
  • 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 July — that's when to go looking.

Could we get there?

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

Properties

density gcc
0.712
diameter km
161572.1978
discovery facility
TrES
discovery method
Transit
discovery year
2004
dist ly
520.7341
eccentricity
0
eq temp k
1140
host star teff
5230
inclination
90
insolation
318.4582
mag
11.424
mass earth
266.9772
multi star system
yes
name
TrES-1 b
orbital period days
3.0301
radius earth
12.6662
semi major au
0.0393
spect
K0 V
sys num planets
1
sys num stars
2
tidally locked
yes
tidally locked inferred
yes

About TrES-1 b

TrES-1 b is a rare exoplanet. It lies about 520.7 light-years from Earth, shines at apparent magnitude 11.42, has spectral type K0 V and has an equilibrium temperature near 1,140 K.

It orbits closer to its star than Mercury does to the Sun, completing a lap in less time than Mercury takes.

How to see it

At apparent magnitude 11.42, a small backyard telescope will bring it into view.

Like any astronomical target, TrES-1 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 TrES-1 b is a rare exoplanet

TrES-1 b scores 41 points on Spacedle's rarity scale, which places it in the rare tier. Another 9 points would lift it into a rarer tier.

That score comes from 5 science badges — Confirmed exoplanet, Gas giant, Hot Jupiter, Tidally locked and Two suns in its sky — 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.