Planet LTT 1445A b

Name LTT 1445A b
Planet Status Confirmed
Discovered in 2019
Mass 0.00903 (± 0.00082) MJ
Mass*sin(i)
Semi-Major Axis 0.03813 (± 0.0007) AU
Orbital Period 5.3587657 (± 4.3e-06) day
Eccentricity 0.11 ( -0.11 +0.0 )
ω 222.0 ( -61.0 +120.0 ) deg
Tperi
Radius 0.11643 ( -0.00544 +0.00589 ) RJ
Inclination 89.68 ( -0.29 +0.22 ) deg
Update 2023-09-19
Detection Method Primary Transit
Mass Detection Method Radial Velocity
Radius Detection Method Primary Transit
Primary transit 2458412.70851 (± 0.0004) JD
Secondary transit
λ
Impact Parameter b 0.17 ( -0.12 +0.15 )
Time Vr=0
Velocity Semiamplitude K 2.6 (± 0.21) m/s
Calculated temperature 424.0 (± 21.0) K
Measured temperature
Hottest point longitude
Geometric albedo
Surface gravity log(g/gH)
Alternate Names TOI-455 b

Star

LTT 1445A
Name LTT 1445A
Distance 6.9 pc
Spectral type M
Apparent magnitude V
Mass 0.256 (± 0.014) MSun
Age
Effective temperature 3340.0 (± 159.0) K
Radius 0.27 (± 0.012) RSun
Metallicity [Fe/H] -0.34 (± 0.09)
Detected Disc
Magnetic Field
RA2000 03:01:51.0
Dec2000 -16:35:36
Alternate Names
Planetary system
3 planets

Remarks

The parent star is part of a triple system with a pair of two other M stars at an angular distance 1.16 arc sec and orbiting around the A star with a period 36.2 years (Winters et al. 2019).

More data

Atmospheric parameters

Temperatures

Data Source Type Result Value Result Figure Notes Reference

Molecules

Molecule Data Source Type Result Value Result Figure Notes Reference
H2O Modeling 2023 - PHILLIPS C.
NH3 Modeling 2023 - PHILLIPS C.

Observability Predictor


Related publications

Ground-based Optical Transmission Spectroscopy of the Nearby Terrestrial Exoplanet LTT 1445Ab
2023 DIAMOND-LOWE H., MENDONCA J., CHARBONNEAU D. & BUCHHAVE L.
Astron. J., 165, 169
paper   arxiv  

Exploring the Potential of Twinkle to Unveil the Nature of LTT 1445 Ab
2023 PHILLIPS C., WANG J., BILLY E., RODRIGUEZ MARTINEZ R., PAI ASKONAR A. & SCOTT GAUDI B.
MNRAS, in press
paper  

Planetary system around LTT 1445A unveiled by ESPRESSO: Multiple planets in a triple M-dwarf system
2023 LAVIE B., BOUCHY F., LOVIS Ch., ZAPATERO OSORIO M., DELINE A. et al.
Astron. & Astrophys., 673, A69
paper   arxiv  

A Second Planet Transiting LTT~1445A and a Determination of the Masses of Both Worlds
2022 WINTERS J., CLOUTIER R., MEDINA A., IRWIN J., CHARBONNEAU D. et al.
Astron. J., 163, 168
paper   arxiv  

X-ray Emission from the Exoplanet Hosting LTT 1445 Triple Star System
2022 BROWN A., FRONING C., YOUNGBLOOD A., FRANCE K., WILSON D. et al.
Astron. J., 164, 206
paper   arxiv  

Is LTT 1445 Ab a Hycean World or a cold Haber World? Exploring the Potential of Twinkle to Unveil Its Nature
2022 PHILLIPS C., WANG J., EDWARDS B., RODRIGUEZ MARTINEZ R., ASNODKAR A. & SCOTT GAUDI B.
MNRAS, submitted
arxiv  

A hot terrestrial planet orbiting the bright M dwarf L 168-9 unveiled by TESS
2020 ASTUDILLO-DEFRU N., CLOUTIER R., WANG S., TESKE J., BRAHM R. et al.
Astron. & Astrophys., 636, A58
paper  arxiv  

Three Red Suns in the Sky: A Transiting, Terrestrial Planet in a Triple M Dwarf System at 6.9 Parsecs
2019 WINTERS J., MEDINA A., IRWIN J., CHARBONNEAU D., ASTUDILLI-DEFRU N. et al.
Astron. J., 158, 152
paper  arxiv