ExoClock

The Star
Simbad GAIA 2MASS	Cl* Melotte 111 AV 2291 DR2 3962403923821595264 J12354142+2712518
RA	12:35:41.4191		DEC	+27:12:51.922
Parallax 7.77 mas		P.M. RA -45.874 mas/y		P.M. DEC -10.766 mas/y
Mag_V 11.51	Mag_R^* 11.491	Mag_I^* 10.412	Mag_J 10.28	Mag_H 9.732	Mag_K 9.643
Mag_G 11.757		Mag_{G_BP} 12.329		Mag_{G_RP} 11.074
^*Calculated from GAIA magnitudes.

Ephemeris - Verified
Kokori et al. 2025
Mid-time 2459349.15233 ± 0.00017 BJD_TDB
Period 3.7130671 ± 1.6e-06 days
Transit Parameters
Rodriguez et al. 2023
R_p/R_s 0.13272 ± 0.00072	a/R_s 12.28 +0.27 -0.31		i 86.48 +0.15 -0.2 deg
R_p/R_s 0.13272 ± 0.00072	e 0.052 +0.062 -0.037		ω 21.0 +57.0 -33.0 deg
Depth_R^* 19.35 mmag		Duration^* 1.95 hours
^Calculated from the other parameters, using PyLightcurve. ^*Adjusted based on the space observations.
Limb Darkening Parameters
Rodriguez et al. 2023
T_eff 4766.0 +52.0 -54.0 K	Log(g) 4.58 +0.02 -0.03 cm/s²		Fe/H 0.306 +0.076 -0.077 dex

ExoClock Status
Observing Priority		LOW
Minimum aperture		5.0"
Total Observations (Recent)		45 (18)
O-C		-1.51 ± 0.22 minutes
ExoClock Observations (Recent)		34 (18)
Space Observations (Recent)		11 (0)
ETD Observations (Recent)		0 (0)
Literature Mid-times (Recent)		0 (0)
Kepler R_p/R_s		-
TESS R_p/R_s		0.133 ± 0.00053

Planet Observation Date	Observer Observatory	Telescope Camera / Filter / Exp [s]	O-C minutes
ExoClock Observations
TOI-1811b (LOW) 2025-04-28	Vojtěch Školník Broumov NM Observatory	Meade LX90 ACF MI C2-7000A / Clear / 90.0	3.19 ± 0.96
TOI-1811b (LOW) 2025-04-28	José Luis Hernández Verdejo José L. Hernández Verdejo (Trevinca Skies)	Newton ONTC ZWO533MMpro / V / 120.0	-0.92 ± 0.96
TOI-1811b (LOW) 2025-04-28	David Bennett Rickford Observatory	GSO RC ZWO ASI2600MM Pro / Lum / 90.0	-1.66 ± 1.12
TOI-1811b (LOW) 2025-04-28	Gerold Holtkamp Private	Newtonian QHY268M / Lum / 120.0	-2.71 ± 1.22
TOI-1811b (LOW) 2025-04-28	Pieter Vuylsteke TheGardenToTheSkyFacility	TS ONTC 25cm f4.7 QHY 268M / rpr / 60.0	-6.64 ± 1.18
TOI-1811b (LOW) 2025-04-16	Ramon Naves Montcabrer	Meade LX200 12" ACF Moravian G4-9000 / ipr / 120.0	0.22 ± 1.35
TOI-1811b (LOW) 2025-04-16	Adrian Jones Private Observatory (I64)	Meade ACF 30cm QSI 583 / R / 60.0	-1.22 ± 1.31
TOI-1811b (LOW) 2025-04-13	Darryl Madison Ajijic Observatory	Celestron CPC 800 Edge HD ZWO2400MC / Clear / 90.0	-1.24 ± 2.3
TOI-1811b (LOW) 2025-04-02	John Savage Rushay Farm Z42	Skywatcher Esprit 150 ZWO ASI 6200MM / Lum / 30.0	-5.85 ± 1.09
TOI-1811b (LOW) 2025-03-21	Vojtěch Školník Broumov NM Observatory	Meade LX90 ACF MI C2-7000A / Clear / 90.0	4.56 ± 1.09
TOI-1811b (LOW) 2025-03-14	Geoffrey Allemand Haleakala Observatory	PlaneWave Delta Rho 350 QHY600 CMOS / AstrodonExoPlanet-BB / 30.0	-3.78 ± 0.94
TOI-1811b (LOW) 2025-03-07	S. Olimpiade Observatoire de haute Provence	NEWTON Andor Ikon L 936 / R / 30.0	-4.73 ± 0.84
TOI-1811b (LOW) 2025-03-07	Tommaso Dittadi TD-TRO	Ritchey-Chretien Moravian G2-1600 / R / 120.0	-5.53 ± 1.31
TOI-1811b (LOW) 2025-02-09	Deborah Smith El Olivar, Gergal, Spain	TS-Optics UNC Newtonian 12" ASI533MM / R / 90.0	-3.55 ± 1.28
TOI-1811b (LOW) 2025-02-05	Darryl Madison Ajijic Observatory	Celestron CPC 800 Edge HD ZWO2400MC / Clear / 60.0	-5.55 ± 3.02
TOI-1811b (LOW) 2025-01-17	Lee YuHsien KMSH Observatory	C14HD QSI-660 / R / 60.0	-3.77 ± 4.9
TOI-1811b (LOW) 2025-01-14	Jordi Gallego Fosca Nit Observatory	Takahashi TOA-150 STL-11000 M / rpr / 150.0	4.53 ± 3.02
TOI-1811b (LOW) 2025-01-14	Sacha Foschino Observatoire des Baronnies Provençales	Planewave 430mm SVO ASI 6200 MM Pro / R / 120.0	1.02 ± 1.4
TOI-1811b (LOW) 2024-05-14	Hans Leipold Kormoran	Celestron Edge HD 9.25 QSI584 / AstrodonExoPlanet-BB / 56.0	-2.77 ± 1.44
TOI-1811b (LOW) 2024-05-02	Andre Kovacs Moletai Astronomical Observatory (MAO)	35 cm Maksutov f/3.5 Apogee Alta U47 / R / 80.0	-2.27 ± 0.78
TOI-1811b (LOW) 2024-04-03	Charles Miller Miller Observatory	Meade 12" LX850 QHY268M / R / 40.0	-2.96 ± 1.27
TOI-1811b (LOW) 2024-03-23	Anaël Wünsche Observatoire des Baronnies Provençales	CDK Planewave 2 ZWO ASI6200 / R / 120.0	2.76 ± 2.16
TOI-1811b (LOW) 2024-03-23	Esteban Reina Observatori de Masquefa	Meade LX200 ZWO ASI 294 MM Pro / R / 120.0	1.88 ± 1.3
TOI-1811b (LOW) 2024-03-23	Tiberiu Savin Tiberiu Savin	Skywatcher 200 Quattro ZWO ASI 533MC / Clear / 30.0	-1.42 ± 3.31
TOI-1811b (LOW) 2024-03-23	Adrian Jones Private Observatory (I64)	Meade ACF 30cm QSI 583 / R / 125.0	-1.98 ± 0.96
TOI-1811b (LOW) 2024-03-23	Attilio Bruzzone Anxanum Observatory	LX200 ACF 10" QHY 268M / R / 180.0	-6.17 ± 1.87
TOI-1811b (LOW) 2024-01-31	Sacha Foschino Observatoire des Baronnies Provençales	Planewave 430mm SVO ASI 6200 MM Pro / R / 120.0	3.49 ± 0.88
TOI-1811b (LOW) 2024-01-19	Vikrant Kumar Agnihotri Cepheid Observatory India	GSO Ritchey–Chrétien Atik383L+ mono / Lum / 90.0	0.25 ± 1.43
TOI-1811b (LOW) 2024-01-16	Adrian Jones Private Observatory (I64)	Meade ACF 30cm QSI 583 / R / 125.0	-0.37 ± 0.98
TOI-1811b (LOW) 2024-01-16	Adam Popowicz Otivar dome2	Newton 12" ASA ASI ZWO 1600MM / R / 52.0	-3.87 ± 1.38
TOI-1811b (LOW) 2023-11-25	Kevin Johnson Holbrook Observatory	Meade LX50 10" Atik 383L+ / R / 90.0	0.08 ± 1.34
TOI-1811b (LOW) 2023-11-25	Adrian Jones Private Observatory (I64)	Meade ACF 30cm QSI 583 / R / 150.0	-0.64 ± 1.02
TOI-1811b (LOW) 2023-05-27	Bryan Martin Tiger Butte Observatory Remote	AG Optical IDK ZWO ASI 294 / R / 120.0	-3.1 ± 2.3
TOI-1811b (LOW) 2023-02-16	Miguel Ángel Álava Amat Sarriguren	Meade SC 8" Asi 1600 MM / Lum / 240.0	-1.65 ± 1.3
Space Observations
Planet Observation Date	Mission		O-C minutes
TOI-1811b (LOW) 2022-03-22	TESS		-0.46 ± 0.48
TOI-1811b (LOW) 2022-03-18	TESS		0.3 ± 0.59
TOI-1811b (LOW) 2022-03-11	TESS		-0.25 ± 0.58
TOI-1811b (LOW) 2022-03-07	TESS		1.73 ± 0.5
TOI-1811b (LOW) 2022-03-03	TESS		-1.11 ± 0.58
TOI-1811b (LOW) 2020-03-17	TESS		0.37 ± 0.66
TOI-1811b (LOW) 2020-03-13	TESS		-1.13 ± 0.66
TOI-1811b (LOW) 2020-03-09	TESS		0.7 ± 0.59
TOI-1811b (LOW) 2020-03-02	TESS		-0.94 ± 0.66
TOI-1811b (LOW) 2020-02-27	TESS		-0.47 ± 0.55
TOI-1811b (LOW) 2020-02-24	TESS		1.08 ± 0.65

TOI-1811b (LOW)

Discovered by: Rodriguez et al. 2023

ExoClock Observations

Space Observations