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TOI-1749 d is a Neptune-like exoplanet (an ice giant with a thick atmosphere), about 2.5 times the radius of Earth. It has an equilibrium temperature of 533 K (260°C). The planet completes one orbit around its star every 9.0 Earth days. It was discovered in 2021 using the transit method. It orbits the M-type star TOI-1749, located approximately 100 parsecs (325 light-years) from Earth.
2021
Discovered
15.0
Earth Masses
2.52
Earth Radii
533
Temperature (K)
Discovery Information
Discovery MethodTransit
Discovery Year2,021
Discovery FacilityTransiting Exoplanet Survey Satellite (TESS)
Orbital Properties
Orbital Period9.0497 days
Semi-Major Axis0.0707 AU
Eccentricity0.062
Inclination88.53 deg
Physical Properties
Mass (Jupiter)0.0472 MJ
Mass (Earth)15 M⊕
Radius (Jupiter)0.2248 RJ
Radius (Earth)2.52 R⊕
Eq. Temperature533 K
Planetary Extremes
Where TOI-1749 d sits on the spectrum of all known exoplanets.
Mass15.0 M⊕
FeatherweightColossus
Radius2.52 R⊕
TinyEnormous
Temperature533 K
FrozenInferno
Year Length9.0 days
LightningGlacial
Star Distance0.071 AU
ScorchedFrozen exile
Star System View
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Size Comparison
2.52x Earth's radius (0.23x Jupiter)
Orbit Comparison
Earth: 365.25 days (1 AU)TOI-1749 d: 9.0 Earth days (0.071 AU)
Host Star: TOI-1749
Spectral TypeM0 V
Effective Temperature3,985 K
Mass0.58 M☉
Radius0.55 R☉
Size vs Sun1.82x smaller
Metallicity [Fe/H]-0.26
Distance (pc)99.5561 pc
Distance (ly)324.7 light-years
Planets in the TOI-1749 System
What If You Lived Here?
165.3 kg
Your weight (from 70 kg)
2.36g
Crushing
Standing upright is a struggle. Your body feels like lead.
9.0 Earth days
Year length
Red sunrise
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