exoclock

TOI-2154b (LOW)

Discovered by: Rodriguez et al. 2023

The Star
Simbad
GAIA
2MASS		 TYC 4617-138-1
DR2 570653411060484480
J04440676+8421511
RA 04:44:06.8691 DEC +84:21:51.118
Parallax
3.344 mas		 P.M. RA
-10.783 mas/y		 P.M. DEC
15.218 mas/y
MagV
11.07		 MagR*
10.835		 MagI*
10.457		 MagJ
10.154		 MagH
9.864		 MagK
9.85
MagG
11.036		 MagGBP
11.324		 MagGRP
10.613
*Calculated from GAIA magnitudes.

Ephemeris - Verified True
Kokori et al. 2025
Mid-time
2459729.86237 ± 0.00014 BJDTDB
Period
3.8240811 ± 2.2e-06 days
Transit Parameters
Rodriguez et al. 2023
Rp/Rs
0.10693 ± 0.00095		 a/Rs
7.91 +0.33 -0.37
 i
83.37 +0.55 -0.75 deg
e
0.117 +0.1 -0.079
 ω
31.0 +98.0 -36.0 deg
DepthR*
11.3 mmag		 Duration*
2.47 hours
*Calculated from the other parameters, using PyLightcurve.
**Adjusted based on the space observations.

Limb Darkening Parameters
Rodriguez et al. 2023
Teff
6280.0 +160.0 -160.0 K
 Log(g)
4.24 +0.04 -0.05 cm/s2
 Fe/H
0.011 +0.071 -0.059 dex
ExoClock Status
Observing Priority LOW
Minimum aperture 5.0"
Total Observations (Recent) 94 (17)
O-C -0.62 ± 0.33 minutes
ExoClock Observations (Recent) 68 (17)
Space Observations (Recent) 26 (0)
ETD Observations (Recent) 0 (0)
Literature Mid-times (Recent) 0 (0)
Kepler Rp/Rs -
TESS Rp/Rs 0.10309 ± 0.00035

TOI-2154b


ExoClock Observations
Planet
Observation Date		 Observer
Observatory		 Telescope
Camera / Filter / Exp [s]		 O-C
minutes
TOI-2154b (LOW)
2026-08-29		Róbert Szakáts
Piszkéstető		ASA AZ800 alt-azimuth telescope
FLI ProLine PL230 / rpr / 60.0		-1.09 ± 0.88
TOI-2154b (LOW)
2026-06-02		Adrian Jones
Private Observatory (I64)		Meade ACF 30cm
QSI 583 / R / 60.0		-0.19 ± 2.45
TOI-2154b (LOW)
2026-05-11		Adrian Jones
Private Observatory (I64)		Meade ACF 30cm
QSI 583 / R / 60.0		-2.08 ± 1.87
TOI-2154b (LOW)
2026-04-21		Matthieu Bachschmidt
Gonachon		Celestron C11
SBIG ST8XE / Clear / 60.0		4.98 ± 3.6
TOI-2154b (LOW)
2026-04-21		Eric Miny
BSA NEW		NEWTON T305
Player One Poseidon / R / 90.0		4.26 ± 2.3
TOI-2154b (LOW)
2026-04-21		Philippe Langlet
NDD CRUET		Célestron 8
ASI294MM PRO / Lum / 60.0		2.1 ± 3.17
TOI-2154b (LOW)
2026-04-21		Mark Salisbury
POST		Orion Optics ODK
SBIG ST-10 XME / R / 240.0		-2.65 ± 1.58
TOI-2154b (LOW)
2026-04-21		Trevor Gainey
Kismet		Meade LX200
ZWO ASI 294 MC Pro / R / 100.0		-12.87 ± 2.59
TOI-2154b (LOW)
2026-03-07		David Wright
Goveryk (private observatory)		Ritchey-Chretien
QSI 683WSG-8 / R / 120.0		-1.25 ± 5.04
TOI-2154b (LOW)
2026-02-15		Snaevarr Guðmundsson
Ness Observatory		Meade LX 200 ACF Schmidt-Cassegrain
SBIG STL 11000M / R / 120.0		-2.25 ± 2.02
TOI-2154b (LOW)
2025-12-12		Philippe Langlet
NDD CRUET		Célestron 8
ASI294MM PRO / Clear / 60.0		7.95 ± 2.59
TOI-2154b (LOW)
2025-12-12		David Bennett
Rickford Observatory		GSO RC
ZWO ASI2600MM Pro / R / 120.0		6.79 ± 2.02
TOI-2154b (LOW)
2025-12-09		Xesco Rubia
Stupa Observatory		CDK14
QHY600PH M BSI / R / 120.0		-1.44 ± 4.18
TOI-2154b (LOW)
2025-12-09		Xesco Rubia
Stupa Observatory		CDK14
QHY600PH M BSI / Lum / 120.0		-6.48 ± 7.2
TOI-2154b (LOW)
2025-11-19		Sofiane Boutelba
stopha		760 bresser achromatique
svbony 605mc / rpr / 180.0		-3.16 ± 3.17
TOI-2154b (LOW)
2025-11-16		Giovanni Calapai
Home Astronomical Observatory		Celestron 11 Schmidt-Cassegrain
Atik 314L+ / Clear / 90.0		0.12 ± 2.45
TOI-2154b (LOW)
2025-09-12		Arushi Nath
Arushi Nath		12" Ritchey- Chretien Pro
ASI 2600 Mono Camera / R / 180.0		1.1 ± 2.45
TOI-2154b (LOW)
2025-08-24		Philippe Langlet
NDCruet		Célestron 8
APN CANON 1100D / Clear / 120.0		-0.76 ± 3.17
TOI-2154b (LOW)
2025-08-24		Paolo Arcangelo Matassa
P:M.P.H.R. Deep Sky (K81)		Ritchey Chretien 40cm-F5.3
CCD ICX453AQ / Lum / 45.0		-4.65 ± 2.3
TOI-2154b (LOW)
2025-08-04		Tommaso Dittadi
TD-TRO		Ritchey-Chretien
Moravian G2-1600 / R / 180.0		-1.48 ± 2.02
TOI-2154b (LOW)
2025-03-27		Vojtěch Školník
Hvězdárna v Úpici		SW N200/800
MI C2-7000A / Clear / 60.0		-2.4 ± 1.87
TOI-2154b (LOW)
2025-03-24		John Collins
JC_Wrexham		Meade LX200GPS
ASI-290m / rpr / 30.0		4.34 ± 2.3
TOI-2154b (LOW)
2025-03-04		Alessandro Marchini
Astronomical Observatory University of Siena		Mak-Cas 0.3m f/5.6
Sbig STL-6303 / R / 180.0		6.36 ± 2.74
TOI-2154b (LOW)
2025-03-04		Pieter Vuylsteke
TheGardenToTheSkyFacility		TS ONTC 25cm f4.7
QHY 268M / rpr / 45.0		5.07 ± 2.02
TOI-2154b (LOW)
2025-03-04		John Savage
Rushay Farm Z42		Skywatcher Esprit 150
ZWO ASI 6200MM / Lum / 30.0		2.76 ± 2.45
TOI-2154b (LOW)
2025-03-04		Mark Salisbury
POST		Orion Optics ODK
SBIG ST-10 XME / R / 240.0		0.82 ± 1.43
TOI-2154b (LOW)
2025-03-04		Christian Sartini
Chris31		C9 xlt
Asi533mc / R / 60.0		0.03 ± 4.03
TOI-2154b (LOW)
2025-03-04		Stephen Futcher
Emsworth S		Celestron NexStar 8SE
Starlight Xpress SX-814 / R / 120.0		-1.56 ± 3.31
TOI-2154b (LOW)
2025-03-04		Matthieu Bachschmidt
Gonachon		Celestron C11
SBIG ST8XME / AstrodonExoPlanet-BB / 60.0		-1.7 ± 2.16
TOI-2154b (LOW)
2025-03-04		Gerold Holtkamp
Private		Newtonian
QHY268M / Lum / 25.0		-1.7 ± 3.17
TOI-2154b (LOW)
2025-03-04		Claudio Lopresti
Claudio Lopresti		Mak-Newton
CCD Sbig ST10xme / Clear / 240.0		-1.84 ± 2.16
TOI-2154b (LOW)
2025-03-04		Stéphane Montchaud
Burgundy Observatory		Celestron 8
Zwo Asi 1600 / Lum / 60.0		-2.13 ± 2.88
TOI-2154b (LOW)
2025-03-04		Philippe Langlet
NDCruet		Célestron 8
APN CANON 1100D / Clear / 120.0		-2.28 ± 5.47
TOI-2154b (LOW)
2025-03-04		Anaël Wünsche
Observatoire des Baronnies Provençales		CDK Planewave 2
ZWO ASI6200 / R / 120.0		-2.42 ± 1.73
TOI-2154b (LOW)
2025-03-04		Antonino Brosio
ABObservatory		Skywatcher Newton Quattro 300P
Atik 383 L / rpr / 240.0		-2.56 ± 2.59
TOI-2154b (LOW)
2025-03-04		Livia Moretti
Leavitt Observatory		Ritchey-Chrétien 10'' f/8
QHY268 / I / 90.0		-4.29 ± 2.59
TOI-2154b (LOW)
2025-03-04		Davide Pica
Private Observatory		Celestron C9.25
QHY 294 M Pro / Clear / 30.0		-6.45 ± 2.3
TOI-2154b (LOW)
2025-03-04		Adrian Jones
Private Observatory (I64)		Meade ACF 30cm
QSI 583 / R / 60.0		-7.17 ± 2.45
TOI-2154b (LOW)
2025-02-06		Davide Pica
Private Observatory		Celestron C9.25
QHY 294 M Pro / Clear / 60.0		-6.5 ± 4.9
TOI-2154b (LOW)
2025-01-21		Snaevarr Guðmundsson
Ness Observatory		Meade LX 200 ACF Schmidt-Cassegrain
SBIG STL 11000M / AstrodonExoPlanet-BB / 90.0		-3.73 ± 1.58
TOI-2154b (LOW)
2025-01-18		Christian Sartini
Chris31		C9 xlt
Asi533mc / R / 60.0		2.01 ± 2.88
TOI-2154b (LOW)
2025-01-18		Joan Aragones
Barcelona - La Salut		GSO 250 f4
ASI1600 mm / Clear / 60.0		-4.19 ± 3.17
TOI-2154b (LOW)
2024-12-26		Yves Jongen
Rasteau Observatory		Plane Wave CDK 17"
SBIG STXL 11002 / R / 120.0		2.27 ± 1.58
TOI-2154b (LOW)
2024-11-17		Snaevarr Guðmundsson
Ness Observatory		Meade LX 200 ACF Schmidt-Cassegrain
SBIG STL 11000M / AstrodonExoPlanet-BB / 75.0		2.29 ± 1.58
TOI-2154b (LOW)
2024-07-29		Zlatko Orbanić
Explorer		Newton Truss 254mm F/3.8
Atik 414 Ex Mono / rpr / 35.0		-3.97 ± 2.02
TOI-2154b (LOW)
2024-07-07		LES BRAND
BLEB		GSO RC8
ZWO ASI1600mm pro / Clear / 152.0		-2.69 ± 5.76
TOI-2154b (LOW)
2024-05-06		Alexey Garmash
Lyceum 130		EdgeHD C11
ASI2600MM pro / R / 180.0		-4.34 ± 1.21
TOI-2154b (LOW)
2024-04-13		Anastasia Kokori
Nostos Observatory		celestron
zwo 249mc PRO colour / Lum / 120.0		4.34 ± 3.46
TOI-2154b (LOW)
2024-04-13		Claudio Lopresti
Claudio Lopresti		Mak-Newton
CCD Sbig ST10xme / Lum / 180.0		4.05 ± 2.3
TOI-2154b (LOW)
2024-04-13		Paolo Arcangelo Matassa
P:M.P.H.R. Deep Sky (K81)		Ritchey Chretien 40cm-F5.3
CCD ICX453AQ / Lum / 60.0		-0.7 ± 2.88
TOI-2154b (LOW)
2024-04-13		Ivo Peretto
MarSEC Marana Space Explorer Center		R-C
Moravia G2-1600 MkII / R / 120.0		-8.77 ± 4.61
TOI-2154b (LOW)
2024-04-10		John Collins
JC_Wrexham		Meade LX200GPS
ASI-290m / rpr / 120.0		1.0 ± 2.3
TOI-2154b (LOW)
2024-04-10		Deborah Smith
Complejo Astronomico Los Coloraos, Gorafe		Celestron C11
QHY9 / R / 60.0		-1.45 ± 3.31
TOI-2154b (LOW)
2024-02-12		Yen-Hsing Lin
NTHU TAT		GSO RC10
Apogee AltaF-6: KAF1001E / R / 60.0		5.49 ± 3.6
TOI-2154b (LOW)
2024-02-05		Ramon Naves
Montcabrer		Meade LX200 12" ACF
Moravian G4-9000 / rpr / 100.0		5.02 ± 1.21
TOI-2154b (LOW)
2024-02-05		Attilio Bruzzone
Anxanum Observatory		LX200 ACF 10"
QHY 268M / Lum / 180.0		2.55 ± 5.18
TOI-2154b (LOW)
2024-02-05		David Quiles
David Quiles Observatory		Celestron EDGEHD 800
Omegon veTEC 571M / R / 120.0		1.26 ± 1.87
TOI-2154b (LOW)
2024-02-05		Luis Miguel Domínguez
Fénix		Newton
ZWO ASI 183 MM Pro / R / 76.0		0.82 ± 2.45
TOI-2154b (LOW)
2024-02-05		Anaël Wünsche
Observatoire des Baronnies Provençales		CDK Planewave 2
ZWO ASI6200 / R / 120.0		-0.18 ± 2.16
TOI-2154b (LOW)
2024-02-05		Mercedes Correa
Sirius B		Meade
Moravian G2 1600 / R / 80.0		-2.34 ± 1.58
TOI-2154b (LOW)
2024-01-01		Yen-Hsing Lin
NTHU TAT		GSO RC10
Apogee AltaF-6: KAF1001E / Clear / 30.0		2.6 ± 2.74
TOI-2154b (LOW)
2023-12-24		Ioannis Gkolias
AUTH-3 hosted at S.P.I.C.A		RASA 11''
QHY163M / Lum / 15.0		2.18 ± 1.4
TOI-2154b (LOW)
2023-11-20		Yen-Hsing Lin
NTHU Observatory		Showa 10 cm
ASI183MC / Lum / 120.0		-3.75 ± 4.75
TOI-2154b (LOW)
2023-11-12		Joan Josep Isach Cogollos
Centro Astronómico Alto Turia (CAAT). MPC J57		Skywatcher
ZWO ASI 1600 MM / R / 120.0		-4.38 ± 6.19
TOI-2154b (LOW)
2023-11-01		Bryan Martin
Tiger Butte Observatory Remote		AG Optical IDK
ZWO ASI 294 / R / 120.0		-6.05 ± 4.18
TOI-2154b (LOW)
2023-10-20		Robert Roth
TURMX Observatory		Planewave CDK17
Moravian C1x 61000 Pro / rpr / 120.0		-1.94 ± 1.27
TOI-2154b (LOW)
2023-09-08		Unai Perez
Unai		Celestron Nexstar 6 SC SLT
ZWO ASI224MC / Lum / 30.0		-5.13 ± 5.04
TOI-2154b (LOW)
2021-02-13		Manfred Raetz
privat observatory Herges-Hallenberg		SCT 280 /1790 (Celestron C11 with reducer)
Moravian Instruments G2-1600 / Clear / 120.0		-0.97 ± 1.15

Space Observations
Planet
Observation Date		 Mission O-C
minutes
TOI-2154b (LOW)
2023-01-14		TESS0.7 ± 0.95
TOI-2154b (LOW)
2023-01-10		TESS1.14 ± 1.04
TOI-2154b (LOW)
2023-01-03		TESS-0.59 ± 1.08
TOI-2154b (LOW)
2022-12-22		TESS0.22 ± 1.11
TOI-2154b (LOW)
2022-12-19		TESS0.59 ± 0.98
TOI-2154b (LOW)
2022-12-15		TESS0.05 ± 1.14
TOI-2154b (LOW)
2022-12-07		TESS-2.31 ± 0.96
TOI-2154b (LOW)
2022-12-03		TESS0.22 ± 0.98
TOI-2154b (LOW)
2022-11-29		TESS0.56 ± 0.95
TOI-2154b (LOW)
2022-07-07		TESS0.32 ± 0.98
TOI-2154b (LOW)
2022-07-03		TESS0.49 ± 1.09
TOI-2154b (LOW)
2022-06-29		TESS1.1 ± 1.02
TOI-2154b (LOW)
2022-06-22		TESS-0.1 ± 0.92
TOI-2154b (LOW)
2022-06-18		TESS0.21 ± 1.08
TOI-2154b (LOW)
2022-06-10		TESS0.46 ± 0.98
TOI-2154b (LOW)
2022-06-07		TESS-1.56 ± 1.07
TOI-2154b (LOW)
2022-06-03		TESS-0.98 ± 1.14
TOI-2154b (LOW)
2022-05-30		TESS-2.87 ± 0.98
TOI-2154b (LOW)
2022-05-26		TESS0.79 ± 1.01
TOI-2154b (LOW)
2022-05-22		TESS2.34 ± 1.09
TOI-2154b (LOW)
2021-07-20		TESS0.84 ± 0.91
TOI-2154b (LOW)
2021-07-16		TESS-0.31 ± 0.99
TOI-2154b (LOW)
2021-07-13		TESS0.23 ± 0.91
TOI-2154b (LOW)
2021-07-05		TESS-0.54 ± 0.86
TOI-2154b (LOW)
2021-07-01		TESS0.02 ± 0.95
TOI-2154b (LOW)
2021-06-27		TESS0.66 ± 0.96
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