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Stellar HostProfile

TOI-3261

K1.5+/-1 • 300.1 pc

Records

3

literature rows

Planets

1

system count

References

4

distinct source labels

TIC: TIC 358070912

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: Nabbie et al. 2024 • System source: TICv8

Temperature

5068 K

5068 to 5151.4

3 values • 3 distinct

Mass

0.86 Msun

0.86 to 0.87

2 values • 2 distinct

Radius

0.85 Rsun

0.85 to 0.86

3 values • 3 distinct

Age

6.50 Gyr

single adopted value

1 values • 1 distinct

Luminosity

-0.37 log(Lsun)

-0.37 to -0.33

2 values • 2 distinct

Distance

300.1 pc

single adopted value

3 values • 1 distinct

Spectral Type

K1.5+/-1

Consistent across records

K1.5+/-1 (1)

Planets

1

Stable across source rows

1

Scale Comparison

Radius against the Sun

Current adopted radius: 0.85 R☉ (circles scaled linearly by radius)

Sun

1.0 R☉ baseline

TOI-3261

0.85 R☉

System Layout

Known planets

1 planets linked to this host

TOI-3261 b

Transit

◌

Discovery

2024

Period

0.88 days

Radius

3.82 R⊕

Mass

30.30 M⊕

Eq. Temp

1722 K

TOI-3261 b: A Close-In Neptune Orbiting a Cool Dwarf

TOI-3261 is a K-type star 979 light-years away. The star is cooler than the Sun, with a spectral type of K1.5+/-1 and a temperature of 5070 K. Its mass is 0.861 solar masses and its radius is 0.849 solar radii, both smaller than the Sun's. The star is also old for a planetary system, with an age of 6.5 billion years. One planet is known to orbit it.

That planet, TOI-3261 b, was discovered in 2024 by the transit method, which detects the small dip in a star's brightness when a planet crosses in front of it. Classified as Neptune-like, TOI-3261 b has a radius of 3.82 Earth radii, larger than Earth's, and a mass of 30.3 Earth masses, also larger than Earth's. Its mean density is 3 g/cm³, 0.544 times Earth's. The planet completes an orbit in just 0.883 days, making it one of the shortest-period Neptune-like worlds known.

Provenance

Underlying measurements and references

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Evidence Summary

Rows

3

Stellar refs

3

System refs

1

Distancestable

3 values • 1 distinct

Parallaxstable

3 values • 1 distinct

Temperaturedisputed

3 values • 3 distinct

Massdisputed

2 values • 2 distinct

Radiusdisputed

3 values • 3 distinct

Agestable

1 values • 1 distinct

Luminositydisputed

2 values • 2 distinct

Surface Gravitydisputed

3 values • 3 distinct

Metallicitydisputed

2 values • 2 distinct

Spectral Typestable

1 values • 1 distinct

ST TEFFST MASSST RADST AGEST LUMST SPECTYPESY DISTStellar RefSystem Ref
5151.40.870.86—-0.33—300.1TICv8TICv8
50680.860.856.50-0.37K1.5+/-1300.1Nabbie et al. 2024TICv8
5151.4—0.86———300.1ExoFOPTICv8