ExoClock

The Star
Simbad GAIA 2MASS	BD+41 4831 DR2 1925321658546436352 J23390581+4227575
RA	23:39:05.8101		DEC	+42:27:57.503
Parallax 3.604 mas		P.M. RA -20.075 mas/y		P.M. DEC 3.123 mas/y
Mag_V 10.47	Mag_R^* 10.129	Mag_I^* 9.957	Mag_J 9.558	Mag_H 9.44	Mag_K 9.313
Mag_G 10.306		Mag_{G_BP} 10.539		Mag_{G_RP} 9.946
^*Calculated from GAIA magnitudes.

Ephemeris - Verified
Kokori et al. 2021
Mid-time 2455260.92994 ± 0.00021 BJD_TDB
Period 3.8529962 ± 5e-07 days
Transit Parameters
Torres et al. 2008
R_p/R_s 0.0934 ± 0.0005	a/R_s 7.69 +0.22 -0.22		i 85.5 +0.3 -0.3 deg
R_p/R_s 0.0934 ± 0.0005	e -		ω - deg
Depth_R^* 10.35 mmag		Duration^* 3.51 hours
^Calculated from the other parameters, using PyLightcurve. ^*Adjusted to produce a duration that matches the observations.
Limb Darkening Parameters
Noyes et al. 2008
T_eff 6570.0 +80.0 -80.0 K	Log(g) 4.22 +0.03 -0.03 cm/s²		Fe/H -0.13 +0.08 -0.08 dex

ExoClock Status
Observing Priority ExoClock Observations (Recent) Space Observations Literature Mid-times ETD Observations O-C minutes		LOW 21 (13) 3 0.5±0.4

ExoClock Observations

Observation Date	Observer Observatory	Telescope Camera / Filter / Exp [s]	O-C minutes
2021-10-07	Manfred Raetz privat observatory Herges-Hallenberg	SCT 280 /1790 (Celestron C11 with reducer) Moravian Instruments G2-1600 / R / 90.0	0.5 ± 0.9
2021-09-10	Yves Jongen Rasteau Observatory	Plane Wave CDK 17" SBIG STXL 11002 / R / 30.0	1.9 ± 1.7
2021-09-07	Jean-Baptiste Marquette MrKite47	Newton Sky-Watcher 200/1000 ZWO ASI183MM Pro / R / 90.0	5.5 ± 2.6
2021-09-07	Adrian Jones Private Observatory (I64)	Meade ACF 30cm QSI 583 / R / 30.0	2.3 ± 2.0
2021-09-07	Patrick Brandebourg Patrick Brandebourg (Observatoire du Guernet)	RC 250 Asi294MM Pro / R / 120.0	-0.7 ± 2.2
2021-08-14	Claudio Lopresti Claudio Lopresti	Mak-Newton CCD Sbig ST10xme / I / 120.0	3.1 ± 4.3
2021-08-14	Paolo Arcangelo Matassa P.M.P.H.R. Deep Sky (K81)	Ritchey Chretien ICX453AQ / Clear / 120.0	3.1 ± 5.8
2021-08-14	Carmelo Falco GALHassin Robotic Telescope 2 (GRT2)	Giacometti-Fogale RC16 Andor Apogee Aspen CG16M / g' / 30.0	3.0 ± 2.6
2021-08-14	Adam Popowicz Observatory Pyskowice	RC12" GSO ASI ZWO 1600 MM / ATIK 11000M / R / 60.0	2.7 ± 2.7
2021-08-14	Carmelo Falco GAL Hassin Robotic Telescope 2 (GRT2) - Multiband	Giacometti-Fogale RC16 - 2 Andor Apogee Aspen CG16M / R / 30.0	2.6 ± 1.7
2021-08-14	Yves Jongen Rasteau Observatory	Plane Wave CDK 17" SBIG STXL 11002 / R / 60.0	2.3 ± 2.2
2021-08-14	Alessandro Marchini Astronomical Observatory, University of Siena	Mak-Cas 0.3m f/5.6 Sbig STL-6303 / I / 180.0	-0.0 ± 1.9
2021-08-11	Adrian Jones Private Observatory (I64)	Meade ACF 30cm QSI 583 / R / 30.0	-1.2 ± 4.3
2020-10-06	Tõnis Eenmäe Tartu Observatory	Zeiss 600 Andor Ikon-L / R / 20.0	-0.9 ± 1.3	- Data available
2020-09-29	Yves Jongen Rasteau Observatory	Plane Wave CDK 17" SBIG STXL 11002 / R / 60.0	-1.1 ± 2.9	- Data available
2020-09-06	Anaël Wünsche Observatoire des Baronnies Provençales	CDK Planewave SBIG STL11K / V / 120.0	-2.2 ± 2.2	- Data available
2020-08-10	Carmelo Falco GALHassin Robotic Telescope 2 (GRT2)	Giacometti-Fogale RC16 Andor Apogee Aspen CG16M / R / 30.0	2.8 ± 1.3	- Data available
2020-08-10	Mauro Caló Cavallino	RC SBIG ST10 / Lum / 60.0	-4.1 ± 1.9	- Data available
2019-10-02	Martin Crow Burnham Observatory	Celestron C9.25 SX694 mono / R / 60.0	-2.1 ± 4.3	- Data available
2018-07-13	Yves Jongen Rasteau Observatory	Plane Wave CDK 17" SBIG STXL 11002 / V / 120.0	-2.3 ± 1.7	- Data available
2012-09-22	Filip Walter Stefanik Observatory	Meade SCT SBIG ST-10XME / R / 60.0	-0.3 ± 1.4	- Data available

Literature Mid-times

Observation Date	Mid-time	Time format	Reference	O-C minutes
2009-11-25	2455160.75292 ± 0.00034	BJD_TDB	Todorov et al. 2012	1.3 ± 0.5
2008-10-01	2454740.77668 ± 0.00063	BJD_TDB	Todorov et al. 2012	1.8 ± 0.9
2006-10-27	2454035.67575 ± 0.00028	HJD_UTC	Noyes et al. 2008	-0.9 ± 0.4

HAT-P-6b

Discovered by: Noyes et al. 2008

ExoClock Observations

Literature Mid-times