Planet LTT 1445A c

Name LTT 1445A c
Planet Status Confirmed
Discovered in 2020
Mass 0.00485 (± 0.0006) MJ
Mass*sin(i)
Semi-Major Axis 0.0266 (± 0.0005) AU
Orbital Period 3.1239035 (± 3.6e-05) day
Eccentricity 0.223 ( -0.223 +0.0 )
ω
Tperi
Radius 0.10233 (± 0.00491) RJ
Inclination 87.43 ( -0.29 +0.18 ) deg
Update 2022-10-22
Detection Method Primary Transit
Mass Detection Method Radial Velocity
Radius Detection Method Primary Transit
Primary transit 2458412.58159 (± 0.00059) JD
Secondary transit
λ
Impact Parameter b 0.937 ( -0.016 +0.012 )
Time Vr=0
Velocity Semiamplitude K 1.67 (± 0.21) m/s
Calculated temperature 508.0 (± 25.0) K
Measured temperature
Hottest point longitude
Geometric albedo
Surface gravity log(g/gH)
Alternate Names TOI-455 c

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

Observability Predictor

Remarks

11 Apr 2020: The orbital period is from ExoF

Related publications

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  

The Demographics of Terrestrial Planets in the Venus Zone
2023 OSTBERG C., KANE S., LI Zh., SCHWIETERMAN E., HILL M. et al.
Astron. J., 165, 168
paper   arxiv  

HST/WFC3 Light Curve Confirms the Closest Exoplanet to Transit an M Dwarf is Terrestrial
2023 PASS E., WINTERS J., CHARBONNEAU D., BALKANSKI A., LEWIS N. et al.
Astron. J., submitted
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  

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