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Stellar HostProfile

SPECULOOS-3

M6.5+/-0.5

Records

2

literature rows

Planets

1

system count

References

3

distinct source labels

TIC: TIC 230741378

Approximate color

from effective temperature

Canonical Summary

Adopted host values from one source row

Values come from the row with the most populated summary measurements. Missing values stay missing. Ranges and counts describe all source rows.

Stellar source: Gillon et al. 2024 • System source: TICv8

Temperature

2800 K

2800 to 2822

2 values • 2 distinct

Mass

0.10 Msun

0.10 to 0.10

2 values • 2 distinct

Radius

0.12 Rsun

0.12 to 0.13

2 values • 2 distinct

Age

6.60 Gyr

single adopted value

1 values • 1 distinct

Luminosity

-3.08 log(Lsun)

-3.08 to -3.04

2 values • 2 distinct

Spectral Type

M6.5+/-0.5

Consistent across records

M6.5+/-0.5 (1)

Planets

1

Stable across source rows

1

Scale Comparison

Radius against the Sun

Current adopted radius: 0.12 R☉ (circles scaled linearly by radius)

Sun

1.0 R☉ baseline

SPECULOOS-3

0.12 R☉

System Layout

Known planets

1 planets linked to this host

◌

Discovery

2024

Period

0.72 days

Radius

0.98 R⊕

Mass

—

Eq. Temp

553 K

SPECULOOS-3 and Its Sub-Earth Planet

SPECULOOS-3 is an M-type dwarf, a small, cool red star, with a spectral type of M6.5+/-0.5. Its mass is 0.101 solar masses, its radius is 0.123 solar radii, and its temperature is 2800 K. The star's reported mass estimate is smaller than the Sun's, and its reported radius estimate is smaller than the Sun's. It is also cooler than the Sun. Its age is 6.6 billion years.

One planet orbits this host: SPECULOOS-3 b. It is a Sub-Earth, meaning its radius is smaller than Earth's. Its radius is 0.977 Earth radii, and that reported radius estimate is smaller than Earth's. The planet was found by transit, the dimming of a star's light when a planet crosses in front of it. Its orbital period, the time it takes to complete one orbit, is 0.719 days.

Provenance

Underlying measurements and references

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Evidence Summary

Rows

2

Stellar refs

2

System refs

1

Temperaturedisputed

2 values • 2 distinct

Massdisputed

2 values • 2 distinct

Radiusdisputed

2 values • 2 distinct

Agestable

1 values • 1 distinct

Luminositydisputed

2 values • 2 distinct

Surface Gravitydisputed

2 values • 2 distinct

Metallicitystable

1 values • 1 distinct

Spectral Typestable

1 values • 1 distinct

ST TEFFST MASSST RADST AGEST LUMST SPECTYPESY DISTStellar RefSystem Ref
28220.100.13—-3.04——TICv8TICv8
28000.100.126.60-3.08M6.5+/-0.5—Gillon et al. 2024TICv8