About TOI-172 b
TOI-172 b is a rare exoplanet. It lies about 1,118.2 light-years from Earth, has an equilibrium temperature near 1,198 K, spans roughly 10.82 Earth radii and weighs about 1,722.64 Earth masses.
About 10.8× the width of Earth.
Rare exoplanet 33 EP
TOI-172 b
RA 316.6319° · Dec -26.6929° · exoplanet
Score breakdown
· 5 badgesRare 46 pts → Epic
- Hot Jupiter +10
- Distant (>1000 ly) +10
- Confirmed exoplanet +5
- Gas giant +4
- Found by TESS +4
Total score 33
13 more points to reach Epic.
Badges
- Confirmed exoplanet · +5
- Gas giant · +4
- Hot Jupiter · +10
- Found by TESS · +4
- Distant (>1000 ly) · +10
Trivia
Could we get there?
- Verdict. Impossible with our current technology — and the next millennium of it.
Getting there
- Aboard Voyager 1. ≈ 19.6 million years at Voyager 1's speed (17 km/s).
- Fastest probe ever. ≈ 1.7 million years even at the Parker Solar Probe's 192 km/s.
- At 10% light speed. ≈ 11.2 thousand years in a starship at a tenth of light speed.
- Distance. 1118 light-years from Earth.
Look-back time
- Look-back time. The light you'd see left around the year 908.
Saying hello
- Say hello. A radio message and its reply would take 2236 years round-trip.
Standing on it
- A year here. A full year lasts just 9.5 Earth days.
By the numbers
- Size. About 10.8× the width of Earth.
- Volume. About 1266 Earths could fit inside it.
- Mass. Roughly 1723× Earth's mass — about 5.4 Jupiters.
- Your weight. You'd weigh about 14.7× your Earth weight standing here.
- Temperature. Around 925°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
- 7.53
- discovery facility
- Transiting Exoplanet Survey Satellite (TESS)
- discovery method
- Transit
- dist ly
- 1118.1639
- eccentricity
- 0.3806
- eq temp k
- 1198
- insolation
- 299
- mass earth
- 1722.6386
- name
- TOI-172 b
- orbital period days
- 9.4772
- radius earth
- 10.8167
- sys num planets
- 1
How to see it
Like any astronomical target, TOI-172 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-172 b is a rare exoplanet
TOI-172 b scores 33 points on Spacedle's rarity scale, which places it in the rare tier. Another 13 points would lift it into a rarer tier.
That score comes from 5 science badges — Confirmed exoplanet, Gas giant, Hot Jupiter, Found by TESS and Distant (>1000 ly) — 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.