exoclock

Qatar-9b (LOW)

Discovered by: Alsubai et al. 2019

The Star
Simbad
GAIA
2MASS		 Qatar 9
DR2 1048109222955337600
J10425960+6057510
RA 10:42:59.5933 DEC +60:57:51.159
Parallax
4.649 mas		 P.M. RA
-23.741 mas/y		 P.M. DEC
-21.274 mas/y
MagV
14.023		 MagR
13.84		 MagI
13.496		 MagJ
11.835		 MagH
11.235		 MagK
11.104
MagG
13.687		 MagGBP
14.439		 MagGRP
12.859
*Calculated from GAIA magnitudes.

Ephemeris - Verified True
Kokori et al. 2022
Mid-time
2459275.4837 ± 0.00012 BJDTDB
Period
1.54077512 ± 4.5e-07 days
Transit Parameters
Alsubai et al. 2019
Rp/Rs
0.1489 ± 0.0009		 a/Rs
7.236 +0.069 -0.069
 i
89.23 +0.64 -0.64 deg
e
-		 ω
- deg
DepthR*
31.38 mmag		 Duration*
1.87 hours
*Calculated from the other parameters, using PyLightcurve.
**Adjusted based on the space observations.

Limb Darkening Parameters
Alsubai et al. 2019
Teff
4309.0 +31.0 -31.0 K
 Log(g)
4.61 +0.01 -0.01 cm/s2
 Fe/H
0.252 +0.076 -0.076 dex
ExoClock Status
Observing Priority LOW
Minimum aperture 10.7"
Total Observations (Recent) 107 (15)
O-C 0.4 ± 0.15 minutes
ExoClock Observations (Recent) 84 (15)
Space Observations (Recent) 16 (0)
ETD Observations (Recent) 6 (0)
Literature Mid-times (Recent) 1 (0)
Kepler Rp/Rs -
TESS Rp/Rs 0.1462 ± 0.0012

Qatar-9b


ExoClock Observations
Planet
Observation Date		 Observer
Observatory		 Telescope
Camera / Filter / Exp [s]		 O-C
minutes
Qatar-9b (LOW)
2024-03-23		Mark Salisbury
POST		Orion Optics ODK
SBIG ST-10 XME / Clear / 240.0		0.31 ± 0.39
Qatar-9b (LOW)
2024-03-23		Simon Dawes
William James II		Celestron Edge11 HD
Risingcam Monochrome SONY imx571 / Lum / 300.0		-1.24 ± 1.73
Qatar-9b (LOW)
2024-03-23		Martin Crow
Burnham Observatory		Celestron C9.25
SX694 mono / Clear / 300.0		-2.97 ± 3.31
Qatar-9b (LOW)
2024-03-16		Mario Morales-Aimar
Observatorio de Sencelles MPC K14		Reflector 10"
SBIG ST7-XME / Clear / 150.0		-0.51 ± 1.11
Qatar-9b (LOW)
2024-02-18		Jordi González-Edo
Landete-Kea		C11
ASI 2600MM pro / Lum / 60.0		0.43 ± 1.05
Qatar-9b (LOW)
2024-02-18		Esteban Reina
Observatori de Masquefa		Meade LX200
ZWO ASI 294 MM Pro / R / 180.0		0.09 ± 1.2
Qatar-9b (LOW)
2024-02-11		John Collins
JC_Wrexham		Meade LX200GPS
ASI-290m / Clear / 30.0		-4.36 ± 1.35
Qatar-9b (LOW)
2024-01-22		Ian Sharp
PixelSkies		Celestron C11 Edge HD
Starlight Xpress Trius Pro SX694 / R / 180.0		-0.48 ± 1.87
Qatar-9b (LOW)
2024-01-13		Changhyun Ryu
Korea National University of Education MAO		Planwave CDK500
Moravian C3-61000 / gpr / 150.0		-4.01 ± 2.02
Qatar-9b (LOW)
2023-12-23		Ian Sharp
PixelSkies		Celestron C11 Edge HD
Starlight Xpress Trius Pro SX694 / R / 180.0		-4.51 ± 2.3
Qatar-9b (LOW)
2023-12-16		Robert Roth
TURMX Observatory		CFF Telescopes 160mm APO
ZWO ASI6200MM Pro / Lum / 120.0		2.13 ± 1.3
Qatar-9b (LOW)
2023-12-07		Changhyun Ryu
Korea National University of Education MAO		Planwave CDK500
Moravian C3-61000 / ipr / 150.0		-0.42 ± 0.96
Qatar-9b (LOW)
2023-12-03		Xavier Bros
Anysllum		Newton Orion Optics 14" f4.6
ASI2600MM Pro / R / 60.0		-1.37 ± 1.12
Qatar-9b (LOW)
2023-05-22		Lorenzo Cabona
OARPAF		Astelco T-800
STX-16801 SBIG / R / 210.0		-0.27 ± 0.65
Qatar-9b (LOW)
2023-05-02		Yves Jongen
Rasteau Observatory		Plane Wave CDK 17"
SBIG STXL 11002 / Lum / 120.0		-1.92 ± 1.17
Qatar-9b (LOW)
2023-04-15		Mark Salisbury
POST		Orion Optics ODK
SBIG ST-10 XME / Clear / 240.0		1.84 ± 0.59
Qatar-9b (LOW)
2023-04-11		Bryan Martin
Tiger Butte Observatory Remote		AG Optical IDK
ZWO ASI 294 / Lum / 180.0		-2.2 ± 1.12
Qatar-9b (LOW)
2023-03-06		Yves Jongen
Rasteau Observatory		Plane Wave CDK 17"
SBIG STXL 11002 / Lum / 180.0		5.15 ± 1.34
Qatar-9b (LOW)
2023-03-06		Jean-Claude MARIO
Observatoire de la Cabergue		T 500 Cassegrain "Arp 83"
ASI 6200 MM / Clear / 240.0		0.24 ± 0.76
Qatar-9b (LOW)
2023-03-03		Eric Miny
BLOIS SOLOGNE ASTRONOMIE OBSERVATORY		Newton T305
QSI 683WS / Lum / 180.0		-1.27 ± 2.3
Qatar-9b (LOW)
2023-03-03		Manfred Raetz
privat observatory Herges-Hallenberg		SCT 280 /1790 (Celestron C11 with reducer)
Moravian Instruments G2-1600 / AstrodonExoPlanet-BB / 120.0		-1.99 ± 1.44
Qatar-9b (LOW)
2023-02-17		Miguel Ángel Álava Amat
Sarriguren		Meade SC 8"
Asi 1600 MM / Lum / 240.0		5.32 ± 2.16
Qatar-9b (LOW)
2023-02-14		Anaël Wünsche
Observatoire des Baronnies Provençales		CDK Planewave 2
ZWO ASI6200 / Clear / 120.0		1.52 ± 0.56
Qatar-9b (LOW)
2023-02-14		Yves Jongen
Rasteau Observatory		Plane Wave CDK 17"
SBIG STXL 11002 / Lum / 120.0		-0.25 ± 0.73
Qatar-9b (LOW)
2023-02-14		Matthieu Bachschmidt
Gonachon		Celestron C11
SBIG ST8XME / AstrodonExoPlanet-BB / 120.0		-1.76 ± 0.78
Qatar-9b (LOW)
2023-02-14		christian PANTACCHINI
Observatoire de BENAYES		Skywhatcher Newton
SBIG STF-8300M / Lum / 240.0		-2.1 ± 1.73
Qatar-9b (LOW)
2023-02-11		Yves Jongen
Rasteau Observatory		Plane Wave CDK 17"
SBIG STXL 11002 / Lum / 120.0		1.5 ± 0.89
Qatar-9b (LOW)
2023-02-04		Robert Roth
TURMX Observatory		Planewave CDK17
QHY600M / rpr / 120.0		1.05 ± 0.82
Qatar-9b (LOW)
2023-02-04		Robert Roth
TURMX Observatory		CFF Telescopes 160mm APO
ZWO ASI6200MM Pro / Lum / 120.0		-0.3 ± 1.28
Qatar-9b (LOW)
2023-02-01		Javier Flores Martín
CAHA		GSO40
zwo 1600mm pro / Lum / 45.0		1.81 ± 0.32
Qatar-9b (LOW)
2023-01-28		Adam Popowicz
Otivar dome2		Newton 12" ASA
ASI ZWO 1600MM / R / 240.0		0.39 ± 1.73
Qatar-9b (LOW)
2022-10-20		Adam Popowicz
Observatory Pyskowice		RC12" GSO
ASI ZWO 1600 MM / ATIK 11000M / R / 240.0		-2.95 ± 3.02
Qatar-9b (LOW)
2022-05-16		Taewoo Kim
Deokheung Optical Astronomy Observatory		NYSC 1m Telescope
FLI PL-16803 or PI SOPHIA-2048B / R / 120.0		-0.55 ± 0.86
Qatar-9b (LOW)
2022-05-12		Alessandro Marchini
Astronomical Observatory University of Siena		Mak-Cas 0.3m f/5.6
Sbig STL-6303 / R / 300.0		-1.81 ± 1.73
Qatar-9b (LOW)
2022-04-25		Robert Roth
TURMX Observatory		CFF Telescopes 160mm APO
ZWO ASI6200MM Pro / Lum / 120.0		-1.63 ± 0.86
Qatar-9b (LOW)
2022-04-18		Claudio Lopresti
Claudio Lopresti		Meade LX200 12"
CCD Sbig ST9xe / R / 180.0		-1.77 ± 1.73
Qatar-9b (LOW)
2022-04-08		Adam Popowicz
Otivar dome2		Newton 12" ASA
ASI ZWO 1600MM / R / 240.0		-0.87 ± 1.73
Qatar-9b (LOW)
2022-04-05		Alessandro Marchini
Astronomical Observatory University of Siena		Mak-Cas 0.3m f/5.6
Sbig STL-6303 / R / 180.0		-3.82 ± 1.73
Qatar-9b (LOW)
2022-03-09		Ivo Peretto
MarSEC Marana Space Explorer Center		R-C
Moravia G2-1600 MkII / Clear / 180.0		-0.11 ± 0.72
Qatar-9b (LOW)
2022-03-09		Pieter Vuylsteke
PieterVuylsteke		Refract
ZWO 2600mm mono ASP-C / Clear / 360.0		-1.27 ± 1.44
Qatar-9b (LOW)
2022-03-09		Raniero Albanesi
157 Frasso Sabino		Cassegrain 14.5"
FLI PROLINE PL1301E-1 / R / 120.0		-1.7 ± 1.01
Qatar-9b (LOW)
2022-03-09		Claudio Lopresti
Claudio Lopresti		Meade LX200 12"
CCD Sbig ST9xe / Lum / 180.0		-1.99 ± 1.15
Qatar-9b (LOW)
2022-02-28		Chiahui Wang
NTNU ES Observatory		RCOS 16" f/8.4 Ritchey-Chretien
Atik One 6 / R / 60.0		1.69 ± 3.17
Qatar-9b (LOW)
2022-02-23		Claudio Lopresti
Claudio Lopresti		Meade LX200 12"
CCD Sbig ST9xe / Lum / 240.0		-0.44 ± 1.3
Qatar-9b (LOW)
2022-02-10		Tobias Gesser
TURMX Observatory		CFF Telescopes 160mm APO
ZWO ASI6200MM Pro / Lum / 120.0		-1.19 ± 1.15
Qatar-9b (LOW)
2022-02-10		Alessandro Marchini
Astronomical Observatory University of Siena		Mak-Cas 0.3m f/5.6
Sbig STL-6303 / I / 300.0		-2.63 ± 1.44
Qatar-9b (LOW)
2022-02-07		Simon Dawes
William James II Observatory		Skywatcher MN190 2
ZWO ASI 1600MM-PRO USB 3.0 Mono Camera / Clear / 120.0		-2.27 ± 2.88
Qatar-9b (LOW)
2022-02-03		Paolo Arcangelo Matassa
P:M.P.H.R. Deep Sky (K81)		Ritchey Chretien 40cm-F5.3
CCD ICX453AQ / Lum / 150.0		-0.18 ± 2.74
Qatar-9b (LOW)
2022-02-03		Antonio Marino
UAN c/o INAF-Osservatorio Astronomico di Capodimonte, Naples ITALY		MEADE
CCD Atik 383L / Clear / 90.0		-3.35 ± 2.3
Qatar-9b (LOW)
2022-01-21		Yves Jongen
Rasteau Observatory		Plane Wave CDK 17"
FLI Kepler CMOS 4040 / Lum / 120.0		-0.22 ± 0.86
Qatar-9b (LOW)
2022-01-18		Enrique Arce
Vallbona Observatory		Newton 10" f4
Sbig ST7-XME / Clear / 180.0		3.31 ± 4.32
Qatar-9b (LOW)
2022-01-18		Mark Salisbury
POST		Orion Optics ODK
SBIG ST-10 XME / R / 240.0		-0.0 ± 0.72
Qatar-9b (LOW)
2022-01-18		Kevin Johnson
Holbrook Observatory		Meade LX10 EMC
Atik 383L+ / Lum / 120.0		-0.58 ± 2.02
Qatar-9b (LOW)
2022-01-18		Gonzalo Fornas
CAAT		TAKA FSQ 106
ASI 1600 / Clear / 120.0		-1.01 ± 4.32
Qatar-9b (LOW)
2022-01-18		Adam Popowicz
Otivar dome2		Newton 12" ASA
ASI ZWO 1600MM / R / 240.0		-1.44 ± 1.3
Qatar-9b (LOW)
2022-01-14		Stéphane Montchaud
Burgundy Observatory		Celestron 8
Zwo Asi 1600 / Lum / 120.0		2.66 ± 2.88
Qatar-9b (LOW)
2022-01-14		Anaël Wünsche
Observatoire des Baronnies Provençales		Astelco
FLIPL230 / Clear / 120.0		1.08 ± 0.43
Qatar-9b (LOW)
2022-01-14		Yves Jongen
Rasteau Observatory		Plane Wave CDK 17"
FLI Kepler CMOS 4040 / Lum / 120.0		1.08 ± 0.58
Qatar-9b (LOW)
2022-01-14		Cyrille Aumasson
observatory of Baronnies Provençales		CDK PLANEWAVE 17"
zwo asi 6200 / Clear / 120.0		1.08 ± 0.43
Qatar-9b (LOW)
2022-01-14		Paolo Arcangelo Matassa
P:M.P.H.R. Deep Sky (K81)		Ritchey Chretien 40cm-F5.3
CCD ICX453AQ / Lum / 120.0		-0.5 ± 2.45
Qatar-9b (LOW)
2022-01-14		Pierre Barroy
Télescope JM Salomon, Planète Sciences, Buthiers		Newton
STT 8300 / R / 60.0		-0.94 ± 0.86
Qatar-9b (LOW)
2022-01-14		Alessandro Marchini
Astronomical Observatory University of Siena		Mak-Cas 0.3m f/5.6
Sbig STL-6303 / R / 300.0		-2.09 ± 1.3
Qatar-9b (LOW)
2022-01-11		Tõnis Eenmäe
Tartu Observatory		Planewave CDK 12.5
Apogee Alta U42 / Lum / 120.0		1.47 ± 0.91
Qatar-9b (LOW)
2022-01-07		Robert Roth
TURMX Observatory		CFF Telescopes 160mm APO
ZWO ASI6200MM Pro / rpr / 120.0		0.04 ± 0.86
Qatar-9b (LOW)
2022-01-04		Adam Popowicz
Otivar dome2		Newton 12" ASA
ASI ZWO 1600MM / R / 240.0		-2.48 ± 1.3
Qatar-9b (LOW)
2022-01-01		Sebastien Brouillard
AstroQueyras		RC500
STX16803 / R / 120.0		4.5 ± 1.44
Qatar-9b (LOW)
2022-01-01		Matthieu Bachschmidt
Gonachon		Celestron C11
SBIG ST8XME / AstrodonExoPlanet-BB / 120.0		0.76 ± 1.3
Qatar-9b (LOW)
2021-12-22		Taewoo Kim
Deokheung Optical Astronomy Observatory		NYSC 1m Telescope
FLI PL-16803 or PI SOPHIA-2048B / R / 120.0		-0.61 ± 0.58
Qatar-9b (LOW)
2021-12-15		Fabio Mortari
Hypatia Observatory		Ritchey Chretienne 250mm f/5.3
Sbig ST8-XE / R / 150.0		1.08 ± 2.02
Qatar-9b (LOW)
2021-12-15		Jean-Baptiste Marquette
MrKite47		Newton Sky-Watcher 200/1000
ZWO ASI183MM Pro / R / 360.0		0.94 ± 2.88
Qatar-9b (LOW)
2021-12-15		Adam Popowicz
Otivar dome2		Newton 12" ASA
ASI ZWO 1600MM / R / 240.0		0.36 ± 1.15
Qatar-9b (LOW)
2021-12-15		Alvaro Fornas Silva
Centro Astronómico Alto Turia (CAAT). MPC J57		Planewave CDK 17"
Sbig STXL 11002 / Clear / 180.0		0.08 ± 0.72
Qatar-9b (LOW)
2021-12-12		Yves Jongen
Rasteau Observatory		Plane Wave CDK 17"
SBIG STXL 11002 / Lum / 120.0		0.72 ± 1.01
Qatar-9b (LOW)
2021-12-12		Robert Roth
TURMX Observatory		Planewave CDK17
QHY600M / rpr / 120.0		0.0 ± 0.86
Qatar-9b (LOW)
2021-12-12		Robert Roth
TURMX Observatory		CFF Telescopes 160mm APO
ZWO ASI6200MM Pro / Lum / 120.0		-0.14 ± 0.86
Qatar-9b (LOW)
2021-12-12		Jean-Bernard Pioppa
La Roque-Esclapon		KEPLER
ATIK 383 L+ / R / 300.0		-1.44 ± 1.58
Qatar-9b (LOW)
2021-11-28		Robert Roth
TURMX Observatory		Planewave CDK17
QHY600M / rpr / 120.0		-0.75 ± 0.43
Qatar-9b (LOW)
2021-11-28		Robert Roth
TURMX Observatory		CFF Telescopes 160mm APO
ZWO ASI6200MM Pro / Lum / 120.0		-1.04 ± 1.01
Qatar-9b (LOW)
2021-11-25		Adam Popowicz
Observatory Pyskowice		RC12" GSO
ASI ZWO 1600 MM / ATIK 11000M / R / 480.0		0.19 ± 2.02
Qatar-9b (LOW)
2021-11-21		Nataliia Maslennikova
Caucasus Mountain Observatory SAI MSU		RC-600 ASA
Andor iKon-L / R / 60.0		-1.57 ± 0.62
Qatar-9b (LOW)
2021-04-27		Manfred Raetz
privat observatory Herges-Hallenberg		SCT 280 /1790 (Celestron C11 with reducer)
Moravian Instruments G2-1600 / Clear / 120.0		-3.86 ± 0.72
Qatar-9b (LOW)
2021-04-07		Francesco Scaggiante
Gruppo Astrofili Salese "GALILEO GALILEI"		NEWTON 410/1710
Custom made with KAF-1603ME CCD sensor / R / 90.0		-0.0 ± 2.16
Qatar-9b (LOW)
2021-04-04		Manfred Raetz
privat observatory Herges-Hallenberg		SCT 280 /1790 (Celestron C11 with reducer)
Moravian Instruments G2-1600 / Clear / 120.0		1.65 ± 0.58
Qatar-9b (LOW)
2021-03-18		Robert Roth
TURMX Observatory		CFF Telescopes 160mm APO
ZWO ASI6200MM Pro / Lum / 120.0		0.68 ± 1.01

Space Observations
Planet
Observation Date		 Mission O-C
minutes
Qatar-9b (LOW)
2021-08-18		TESS1.22 ± 1.32
Qatar-9b (LOW)
2021-08-16		TESS-0.41 ± 1.73
Qatar-9b (LOW)
2021-08-15		TESS0.56 ± 1.44
Qatar-9b (LOW)
2021-08-13		TESS0.16 ± 1.17
Qatar-9b (LOW)
2021-08-12		TESS-1.01 ± 1.25
Qatar-9b (LOW)
2021-08-10		TESS-0.26 ± 1.14
Qatar-9b (LOW)
2021-08-09		TESS0.77 ± 1.37
Qatar-9b (LOW)
2021-08-07		TESS0.81 ± 1.44
Qatar-9b (LOW)
2021-08-04		TESS-0.2 ± 1.17
Qatar-9b (LOW)
2021-08-03		TESS0.21 ± 1.38
Qatar-9b (LOW)
2021-08-01		TESS-1.23 ± 1.21
Qatar-9b (LOW)
2021-07-30		TESS0.98 ± 1.38
Qatar-9b (LOW)
2021-07-29		TESS0.67 ± 1.21
Qatar-9b (LOW)
2021-07-27		TESS-0.56 ± 1.01
Qatar-9b (LOW)
2021-07-26		TESS-0.63 ± 1.44
Qatar-9b (LOW)
2021-07-24		TESS0.42 ± 1.22

ETD Observations
Planet
Observation Date		 Observer(s) ETD link O-C
minutes
Qatar-9b (LOW)
2021-04-20		Joe Garlitz16189306210.14 ± 1.3
Qatar-9b (LOW)
2021-04-17		Joe Garlitz16186729341.51 ± 1.01
Qatar-9b (LOW)
2021-04-07		Anaël Wünsche1617907365-0.15 ± 1.01
Qatar-9b (LOW)
2021-04-04		Vrašťák M16176397071.51 ± 1.3
Qatar-9b (LOW)
2021-04-04		Marc Bretton16175755050.46 ± 0.33
Qatar-9b (LOW)
2021-03-15		Matteo Cataneo, Emanuele Russo, Filippo Leveraro16160036561.19 ± 0.72

Literature Mid-times
Planet
Observation Date		 Reference O-C
minutes
2018-04-19 Alsubai et al. 2019 -0.27 ± 0.39
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