An Earth-sized planet on a 5.4 h orbit around a nearby K dwarf

Open Access

Table 1

Parameters of TOI-2431.

Parameter	Description	Value	Source
Main identifiers
Gaia DR3 Source ID	−	22707874346819712	Gaia
TIC	TESS Input Catalog Identifier	258804746	TIC
TOI	TESS Object of Interest Identifier	2431
HIP	Hipparchos Identifier	HIP 11707	HIP
2MASS	2MASS ID	J02310327+0822550	2MASS

Equatorial coordinates and proper motion
α_J2016 (RA)	Right Ascension (RA), ICRS epoch 2016.0	02:31:03.68	Gaia
δ_J2016 (Dec)	Declination (Dec), ICRS epoch 2016.0	08:22:53.85	Gaia
μ_α (mas yr⁻¹)	Proper motion (RA, mas yr-1)	374.86 ± 0.024	Gaia
μ_δ (mas yr⁻¹)	Proper motion (Dec, mas yr-1)	−85.68 ± 0.018	Gaia
Spectral type	−	K7V	This work

Photometric magnitudes
U (mag)	APASS Johnson U magnitude	13.5	APASS
B_TYCHO (mag)	TYCHO B magnitude	12.14 ± 0.14	TYCHO
B (mag)	APASS Johnson B magnitude	12.23 ± 0.01	APASS
BP (mag)	Gaia DR3 BP magnitude	11.120 ± 0.003	Gaia
V_TYCHO (mag)	TYCHO V magnitude	11.03 ± 0.08	TYCHO
V (mag)	APASS Johnson V magnitude	10.89 ± 0.01	APASS
G (mag)	Gaia DR3 G magnitude	10.325 ± 0.003	Gaia
RP (mag)	Gaia DR3 RP magnitude	9.458 ± 0.004	Gaia
T (mag)	TESS magnitude	9.521 ± 0.006	TESS
J (mag)	2MASS J magnitude	8.36 ± 0.02	2MASS
H (mag)	2MASS H magnitude	7.73 ± 0.05	2MASS
K_S (mag)	2 MASS K_S magnitude	7.55 ± 0.02	2MASS
WISE1 (mag)	WISE1 magnitude	7.49 ± 0.03	WISE
WISE2 (mag)	WISE2 magnitude	7.55 ± 0.02	WISE

Stellar parameters from the SED fitting
T_eff (K)	Effective temperature	$4109_{- 27}^{+ 28}$ $Mathematical equation: $\[4109_{-27}^{+28}\]$$	This work
log g (cgs)	Stellar gravity	4.68 ± 0.05	This work
[Fe/H] (dex)	Stellar metallicity	−0.02 ± 0.13	This work

Derived stellar parameters
M_⋆,iso (M_⊙)	Stellar (Isochrone) mass	${0.661}_{- 0.024}^{+ 0.021}$ $Mathematical equation: $\[0.661_{-0.024}^{+0.021}\]$$	This work
R_⋆ (R_⊙)	Stellar radius	0.651 ± 0.012	This work
L_⋆ (L_⊙)	Luminosity	0.109 ± 0.005	This work
A_v (mag)	Visual extinction	0.0 (Fixed)	This work
d (pc)	Distance	${36.01}_{- 0.02}^{+ 0.06}$ $Mathematical equation: $\[36.01_{-0.02}^{+0.06}\]$$	This work
ω (mas)	Parallax	${27.76}_{- 0.03}^{+ 0.02}$ $Mathematical equation: $\[27.76_{-0.03}^{+0.02}\]$$ mas	This work
Age (Gyr)	Stellar age	${2.0}_{- 1.7}^{+ 9.1}$ $Mathematical equation: $\[2.0_{-1.7}^{+9.1}\]$$	This work
ρ_⋆ (g cm⁻³)	Stellar density	${3.23}_{- 0.18}^{+ 0.18}$ $Mathematical equation: $\[3.23_{-0.18}^{+0.18}\]$$	This work

Other stellar parameters
v sin i_⋆ (km s⁻¹)	Rotational velocity	<2	This work
RUWE	Gaia RUWE	1.070	Gaia

Notes. The photometric parameters shown were queried by ARIADNE and used for the SED fit. Gaia (2016; 2018; 2023), TESS (Stassun et al. 2019, 2018), 2MASS (Skrutskie et al. 2006), WISE (Wright et al. 2010), APASS (Munari et al. 2014), TYCHO (Høg et al. 2000), HIP (Perryman et al. 1997).

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