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Stellar HostProfile

TRAPPIST-1

M8.0 V

Records

10

literature rows

Planets

7

system count

References

11

distinct source labels

TIC: TIC 278892590

Approximate color

from effective temperature

Canonical Summary

Adopted host values from all rows

Numeric fields use the median of non-null measurements. Disagreement stays visible through ranges, counts, and provenance.

Temperature

2566 K

2520 to 5780

7 values โ€ข 6 distinct

Mass

0.09 Msun

0.08 to 0.09

7 values โ€ข 5 distinct

Radius

0.12 Rsun

0.11 to 0.12

7 values โ€ข 4 distinct

Age

4.05 Gyr

0.50 to 7.60

2 values โ€ข 2 distinct

Luminosity

-3.26 log(Lsun)

-3.28 to -3.26

5 values โ€ข 4 distinct

Spectral Type

M8.0 V

Consistent across records

M8.0 V (1)

Planets

7

Stable across source rows

7

Scale Comparison

Radius against the Sun

Current adopted radius: 0.12 Rโ˜‰ โ€ข circles scaled linearly by radius

Sun

1.0 Rโ˜‰ baseline

TRAPPIST-1

0.12 Rโ˜‰

System Layout

Known planets

7 planets linked to this host

โ—Œ

Discovery

2017

Period

โ€”

Radius

1.05 RโŠ•

Mass

0.93 MโŠ•

Eq. Temp

โ€”

โ—Œ

Discovery

2016

Period

2.42 days

Radius

1.05 RโŠ•

Mass

โ€”

Eq. Temp

342 K

โ—Œ

Discovery

2016

Period

1.51 days

Radius

1.11 RโŠ•

Mass

โ€”

Eq. Temp

400 K

โ—Œ

Discovery

2017

Period

โ€”

Radius

1.15 RโŠ•

Mass

1.15 MโŠ•

Eq. Temp

โ€”

โ—Œ

Discovery

2017

Period

โ€”

Radius

0.91 RโŠ•

Mass

0.77 MโŠ•

Eq. Temp

โ€”

โ—Œ

Discovery

2016

Period

โ€”

Radius

0.78 RโŠ•

Mass

0.30 MโŠ•

Eq. Temp

โ€”

โ—Œ

Discovery

2017

Period

โ€”

Radius

0.77 RโŠ•

Mass

0.33 MโŠ•

Eq. Temp

โ€”

Provenance

Underlying measurements and references

Download JSONDownload CSV

Evidence Summary

Rows

10

Stellar refs

10

System refs

1

Temperaturedisputed

7 values โ€ข 6 distinct

Massdisputed

7 values โ€ข 5 distinct

Radiusdisputed

7 values โ€ข 4 distinct

Agedisputed

2 values โ€ข 2 distinct

Luminositydisputed

5 values โ€ข 4 distinct

Surface Gravitydisputed

4 values โ€ข 2 distinct

Metallicitydisputed

4 values โ€ข 3 distinct

Spectral Typestable

1 values โ€ข 1 distinct

ST TEFFST MASSST RADST AGEST LUMST SPECTYPESY DISTStellar RefSystem Ref
โ€”0.090.11โ€”โ€”โ€”โ€”TICv8TICv8
25660.090.12โ€”-3.26โ€”โ€”Agol et al. 2021TICv8
โ€”โ€”โ€”โ€”โ€”โ€”โ€”Hirano et al. 2020TICv8
โ€”0.09โ€”โ€”โ€”โ€”โ€”Grimm et al. 2018TICv8
25660.090.127.60-3.26M8.0 Vโ€”Piaulet-Ghorayeb et al. 2025TICv8
25590.080.12โ€”-3.28โ€”โ€”Gillon et al. 2017TICv8
25200.090.12โ€”-3.26โ€”โ€”Ducrot et al. 2020TICv8
5780โ€”0.11โ€”โ€”โ€”โ€”ExoFOPTICv8
3352.3โ€”โ€”โ€”โ€”โ€”โ€”Gaia DR2TICv8
25500.080.120.50-3.28โ€”โ€”Gillon et al. 2016TICv8