ExoplanetDetail

LHS 1140 c

Host star LHS 1140 • 1.27 R⊕ • 3.78 d orbit

Records

archive rows

Discovery

2018

Transit

Radius

1.27 R⊕

default parameter set

Mass

1.91 M⊕

default parameter set

LHS 1140

422 K equilibrium

Selected source: Cadieux et al. 2024

Host Star

LHS 1140

Stable across source rows

LHS 1140

Discovery Method

Transit

Consistent across records

Transit (6)

Discovery Year

2018

Stable across source rows

2018

Orbital Period

3.78 day

3.78 to 3.78

6 values • 6 distinct

Semi-Major Axis

0.03 au

0.03 to 0.03

3 values • 3 distinct

Radius

1.27 Rearth

1.17 to 1.57

5 values • 5 distinct

Mass

1.91 Mearth

1.76 to 1.91

4 values • 4 distinct

Density

5.10 g/cm**3

4.70 to 6.07

3 values • 3 distinct

Equilibrium Temperature

422 K

394.4 to 708.9

5 values • 5 distinct

Earth

1.0 R⊕ baseline

LHS 1140 c

1.27 R⊕

Jupiter

11.2 R⊕ reference

Evidence Summary

Rows

Refs

Methods

Discoverystable

6 values • 1 distinct

Facilitystable

6 values • 1 distinct

Periodstable

6 values • 1 distinct

Radiusdisputed

5 values • 5 distinct

Massdisputed

4 values • 4 distinct

Eq. Tempdisputed

5 values • 5 distinct

Year	Method	Facility	Telescope	Period	Radius	Mass	Eq. Temp	Reference
2018	Transit	Multiple Observatories	Multiple Telescopes	3.78 day	1.25 Rearth	1.89 Mearth	421 K	Weisserman et al. 2026
2018	Transit	Multiple Observatories	Multiple Telescopes	3.78 day	1.28 Rearth	1.81 Mearth	438 K	Ment et al. 2019
2018	Transit	Multiple Observatories	Multiple Telescopes	3.78 day	1.57 Rearth	—	394.4 K	ExoFOP
2018	Transit	Multiple Observatories	Multiple Telescopes	3.78 day	1.17 Rearth	1.76 Mearth	708.9 K	Lillo-Box et al. 2020
2018	Transit	Multiple Observatories	Multiple Telescopes	3.78 day	—	—	—	Kokori et al. 2023
2018	Transit	Multiple Observatories	Multiple Telescopes	3.78 day	1.27 Rearth	1.91 Mearth	422 K	Cadieux et al. 2024

LHS 1140 c

Adopted planet values from the default parameter set

Radius against familiar reference worlds

Underlying measurements and references