About SPECULOOS-3 b
SPECULOOS-3 b is a rare exoplanet. It has an equilibrium temperature near 553 K, spans roughly 0.98 Earth radii, weighs about 0.89 Earth masses and completes an orbit every 0.72 days.
Almost exactly Earth-sized.
Rare exoplanet 35 EP
SPECULOOS-3 b
RA 312.3633° · Dec 33.6124° · exoplanet
Score breakdown
· 3 badgesRare 46 pts → Epic
- Earth-sized +16
- Ultra-short period +14
- Confirmed exoplanet +5
Total score 35
11 more points to reach Epic.
Badges
- Confirmed exoplanet · +5
- Earth-sized · +16
- Ultra-short period · +14
Trivia
Standing on it
- A year here. A full year lasts just 0.7 Earth days.
By the numbers
- Size. Almost exactly Earth-sized.
- Mass. About 0.9× the mass of Earth.
- Your weight. You'd weigh about 0.9× your Earth weight standing here.
- Temperature. A scorching 280°C on average.
How we found it
- Discovery. Found by SPECULOOS Southern Observatory using the transit method.
Properties
- density gcc
- 5.27
- discovery facility
- SPECULOOS Southern Observatory
- discovery method
- Transit
- eq temp k
- 553
- insolation
- 15.54
- mass earth
- 0.894
- name
- SPECULOOS-3 b
- orbital period days
- 0.7191
- radius earth
- 0.977
- sys num planets
- 1
How to see it
Like any astronomical target, SPECULOOS-3 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 SPECULOOS-3 b is a rare exoplanet
SPECULOOS-3 b scores 35 points on Spacedle's rarity scale, which places it in the rare tier. Another 11 points would lift it into a rarer tier.
That score comes from 3 science badges — Confirmed exoplanet, Earth-sized and Ultra-short period — 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.