Exoplanet TOI-733b, discovered 245 light-years away, is a unique celestial body with a density of 3.98 g/cm³. Slightly less than double Earth's radius, it orbits a star smaller than the Sun every 4.9 days.
Exoplanet Quick Facts
Planet Type | Super Earth |
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Discovery Date | 2023 |
Mass (Earths) | 5.72 |
Radius (Earth) | 1.992 |
Orbital Radius | 0.0618 AU |
Orbital Period | 4.9 Days |
Eccentricity | 0.05 |
Detection Method | Transit |
Exoplanet Detection
In a groundbreaking revelation, the scientific community has identified a novel exoplanet, TOI-733b, situated approximately 245 light-years away from Earth. Published in the esteemed Astronomy & Astrophysics journal, the study delineates key attributes of this celestial body.
Notably, TOI-733b, with a radius just under twice that of Earth, exhibits a density of 3.98 grams per cubic centimeter, surpassing Mars but falling short of Earth's density. Orbiting a star marginally smaller than the Sun, this exoplanet completes its orbit in a mere 4.9 days, owing to its proximity to the stellar body. Intriguingly, experts posit two plausible scenarios for TOI-733b: the loss of its atmospheric layer due to its proximity to the star or its potential characterization as a "highly irradiated oceanic world."
The planet's resemblance to a mini Neptune and its association with the shrinking process common to such bodies further accentuate its scientific significance.

About TOI-733b
In a celestial milestone, the astronomical community has unveiled TOI-733b, a recently discovered exoplanet positioned 245 light-years away from Earth. Published in the prestigious Astronomy & Astrophysics journal, this groundbreaking study reveals that TOI-733b, boasting a radius slightly less than double that of Earth, exhibits a density of 3.98 grams per cubic centimeter.
This density, while surpassing that of Mars, falls below Earth's 5.51 grams per cubic centimeter. The exoplanet, orbiting a star marginally smaller than the Sun, completes its orbit in a mere 4.9 days, a phenomenon attributed to its close proximity to the stellar body. Currently, TOI-733b stands as a desolate, arid mass, devoid of a gaseous atmosphere, sparking speculation among experts.
The study explores two hypotheses: atmospheric dissipation due to its solar proximity or an intriguing alternative, the potential existence of an irradiated oceanic environment. Analogous to a miniature Neptune, TOI-733b mirrors the shrinking process observed in similar celestial bodies, raising questions about the responsible mechanism. This discovery underscores the evolving frontier of exoplanetary research, adding a unique dimension to our understanding of distant planetary systems.