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Epic exoplanet 63 EP

TOI-4603 b

RA 83.8659° · Dec 21.2942° · exoplanet

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Score breakdown

· 7 badges
63 pts · Epic
Epic 68 pts → Anomaly
  • Denser than iron +18
  • Lava world +14
  • Hot Jupiter +10
  • Blasted by starlight +8
  • Confirmed exoplanet +5
  • Gas giant +4
  • Found by TESS +4
Total score 63

5 more points to reach Anomaly.

Badges

  • Confirmed exoplanet · +5
  • Gas giant · +4
  • Hot Jupiter · +10
  • Lava world · +14
  • Denser than iron · +18
  • Blasted by starlight · +8
  • Found by TESS · +4

Trivia

What makes it special

  • Lava world. Its surface is likely an ocean of molten rock.
  • Heavyweight. Packed denser than solid iron.

Could we get there?

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

Getting there

  • Aboard Voyager 1. ≈ 12.9 million years at Voyager 1's speed (17 km/s).
  • Fastest probe ever. ≈ 1.1 million years even at the Parker Solar Probe's 192 km/s.
  • At 10% light speed. ≈ 7359 years in a starship at a tenth of light speed.
  • Distance. 736 light-years from Earth.

Look-back time

  • Look-back time. The light you'd see left around the year 1290.

Saying hello

  • Say hello. A radio message and its reply would take 1472 years round-trip.

Standing on it

  • A year here. A full year lasts just 7.2 Earth days.

By the numbers

  • Size. About 11.7× the width of Earth.
  • Volume. About 1593 Earths could fit inside it.
  • Mass. Roughly 4097× Earth's mass — about 12.9 Jupiters.
  • Your weight. You'd weigh about 30.0× your Earth weight standing here.
  • Density. Denser than solid iron.
  • Temperature. Around 1404°C — hotter than a self-cleaning oven.

How we found it

  • Discovery. Found by Transiting Exoplanet Survey Satellite (TESS) using the transit method.

Properties

density gcc
14.1
discovery facility
Transiting Exoplanet Survey Satellite (TESS)
discovery method
Transit
dist ly
735.9482
eccentricity
0.325
eq temp k
1677
insolation
1192
mass earth
4096.8082
name
TOI-4603 b
orbital period days
7.246
radius earth
11.6798
sys num planets
1

About TOI-4603 b

TOI-4603 b is an epic exoplanet. It lies about 735.9 light-years from Earth, has an equilibrium temperature near 1,677 K, spans roughly 11.68 Earth radii and weighs about 4,096.81 Earth masses.

Its surface is likely an ocean of molten rock.

How to see it

Like any astronomical target, TOI-4603 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 TOI-4603 b is an epic exoplanet

TOI-4603 b scores 63 points on Spacedle's rarity scale, which places it in the epic tier. Another 5 points would lift it into a rarer tier.

That score comes from 7 science badges — Confirmed exoplanet, Gas giant, Hot Jupiter, Lava world, Denser than iron, Blasted by starlight and Found by TESS — 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.

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Sky imagery and survey data courtesy of Aladin Lite & CDS, Strasbourg. Object data from the NASA Exoplanet Archive, JPL Small-Body Database, and the ATNF Pulsar Catalogue.