ExoClock

The Star
Simbad GAIA 2MASS	HAT-P-55 DR2 4593808272896243328 J17370562+2543522
RA	17:37:05.6338		DEC	+25:43:52.254
Parallax 1.927 mas		P.M. RA 7.393 mas/y		P.M. DEC -8.116 mas/y
Mag_V 13.207	Mag_R^* 12.873	Mag_I 12.67	Mag_J 12.02	Mag_H 11.714	Mag_K 11.627
Mag_G 13.096		Mag_{G_BP} 13.434		Mag_{G_RP} 12.599
^*Calculated from GAIA magnitudes.

Ephemeris - Verified
Kokori et al. 2021
Mid-time 2457720.3595 ± 0.0003 BJD_TDB
Period 3.5852329 ± 1.2e-06 days
Transit Parameters
Juncher et al. 2015
R_p/R_s 0.1202 ± 0.0019	a/R_s 9.8 +0.3 -0.3		i 87.7 +0.6 -0.6 deg
R_p/R_s 0.1202 ± 0.0019	e -		ω - deg
Depth_R^* 18.53 mmag		Duration^* 2.94 hours
^Calculated from the other parameters, using PyLightcurve. ^*Adjusted to produce a duration that matches the observations.
Limb Darkening Parameters
Juncher et al. 2015
T_eff 5808.0 +50.0 -50.0 K	Log(g) 4.43 +0.03 -0.03 cm/s²		Fe/H -0.03 +0.08 -0.08 dex

ExoClock Status
Observing Priority ExoClock Observations (Recent) Space Observations Literature Mid-times ETD Observations O-C minutes		LOW 23 (5) 1 -0.5±0.3

ExoClock Observations

Observation Date	Observer Observatory	Telescope Camera / Filter / Exp [s]	O-C minutes
2022-07-24	Paolo Arcangelo Matassa P:M.P.H.R. Deep Sky (K81)	Ritchey Chretien 40cm-F5.3 CCD ICX453AQ / Lum / 90.0	-3.8 ± 4.3
2022-07-07	Sebastien Brouillard AstroQueyras	RC500 STX16803 / R / 240.0	-2.4 ± 1.4
2022-05-25	Kevin Johnson Holbrook Observatory	Meade LX10 EMC Atik 383L+ / Lum / 150.0	-1.9 ± 2.6
2022-03-07	Yves Jongen Rasteau Observatory	Plane Wave CDK 17" FLI Kepler CMOS 4040 / Lum / 180.0	1.5 ± 1.3
2021-08-21	Ivo Peretto MarSEC Marana Space Explorer Center	R-C Moravia G2-1600 MkII / Clear / 60.0	-1.8 ± 1.9
2021-06-29	Yves Jongen Deep Sky Chile	Plane Wave CDK 17" Moravian 4G / Lum / 120.0	-2.1 ± 1.0
2021-06-21	Gonzalo Fornas CAAT	TAKA FSQ 106 ASI 1600 / Clear / 120.0	0.3 ± 3.3
2021-06-21	Adam Popowicz Otivar dome2	Newton 12" ASA ASI ZWO 1600MM / R / 93.0	0.0 ± 1.6
2021-06-04	Francois Regembal HRTobs	Astrosib RC360 SBIG STX 16803 / Lum / 60.0	-0.6 ± 2.3
2021-05-27	Alessandro Nastasi Galhassin Robotic Telescope 1 (GRT1)	Officina Stellare RiLa 400 FLI ProLine 16803 / Lum / 40.0	-0.7 ± 2.9
2021-05-27	Carmelo Falco GALHassin Robotic Telescope 2 (GRT2)	Giacometti-Fogale RC16 Andor Apogee Aspen CG16M / Lum / 90.0	-2.7 ± 1.7
2021-05-09	Alessandro Nastasi Galhassin Robotic Telescope 1 (GRT1)	Officina Stellare RiLa 400 FLI ProLine 16803 / Lum / 30.0	0.7 ± 2.2
2021-05-09	Slawomir Lasota Observatory Pyskowice	RC12" GSO ASI ZWO 1600 MM / ATIK 11000M / R / 240.0	-2.9 ± 3.3
2021-05-09	Carmelo Falco GALHassin Robotic Telescope 2 (GRT2)	Giacometti-Fogale RC16 Andor Apogee Aspen CG16M / Lum / 60.0	-4.0 ± 1.2
2021-04-22	John Savage Z42 Rushay Farm Observatory	Celestron 14Edge FR ZWO ASI6200MM / Lum / 60.0	1.5 ± 1.3
2021-04-22	Adrian Jones Private Observatory (I64)	Meade ACF 30cm QSI 583 / Lum / 200.0	0.2 ± 1.6
2021-03-31	Billy Edwards Haleakala Observatory	LCO Meade SBIG STX6303 / r' / 69.945	-0.1 ± 2.4
2020-08-06	Yves Jongen Rasteau Observatory	Plane Wave CDK 17" SBIG STXL 11002 / Clear / 120.0	2.3 ± 1.3	- Data available
2020-07-02	Jean-Pascal Vignes oria Spain	officina stellare 700 FLI camera 4096 by 4096 pixels 9.0µ by 9.0µ pixel size / R / 90.0	-0.5 ± 2.0	- Data available
2020-06-06	Matthias Mallonn STELLA	Cassegrain optical CCD photometer / r' / 60.0	1.4 ± 0.7	- Data available
2020-06-06	Alberto Tomatis Alto-Observatory	RC STL 6303 / Lum / 90.0	-4.9 ± 2.0	- Data available
2020-05-20	Adrian Jones Oldfield Observatory (I64)	Meade ACF 30cm QSI 583 / R / 120.0	-3.8 ± 1.7	- Data available
2020-05-16	Billy Edwards Haleakala Observatory	LCO Meade SBIG STX6303 / r' / 61.942	3.3 ± 3.0

Literature Mid-times

Observation Date	Mid-time	Time format	Reference	O-C minutes
2014-03-14	2456730.83468 ± 0.00027	BJD_UTC	Juncher et al. 2015	0.3 ± 0.4

Linked ETD Observations

Observation Date	Observer(s)	O-C minutes
2019-09-04	ESSEIVA nicolas	-2.2 ± 1.7	- Data available through ETD
2019-07-05	Fran Campos	-1.2 ± 1.2	- Data available through ETD
2019-06-18	Pere Guerra	1.2 ± 1.3	- Data available through ETD
2019-05-05	Pere Guerra	3.6 ± 1.4	- Data available through ETD
2018-04-20	F. Lomoz	-3.3 ± 2.0	- Data available through ETD
2017-05-18	František Lomoz	-3.5 ± 1.6	- Data available through ETD
2017-05-18	František Lomoz	-6.7 ± 2.2	- Data available through ETD
2017-04-13	David Molina	-1.9 ± 2.8	- Data available through ETD
2016-09-27	CAA1 S39 Astro Queyras	-1.0 ± 1.2	- Data available through ETD

HAT-P-55b

Discovered by: Juncher et al. 2015

ExoClock Observations

Literature Mid-times

Linked ETD Observations