| 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 
|
|||||
|---|---|---|---|---|---|
| Kokori et al. 2025 | |||||
| Mid-time 2459571.312603 ± 8.9e-05 BJDTDB |
|||||
| Period 1.54077557 ± 3.5e-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) | 153 (24) | ||||
| O-C | -0.33 ± 0.15 minutes | ||||
| ExoClock Observations (Recent) | 117 (24) | ||||
| Space Observations (Recent) | 29 (0) | ||||
| ETD Observations (Recent) | 6 (0) | ||||
| Literature Mid-times (Recent) | 1 (0) | ||||
| Kepler Rp/Rs | - | ||||
| TESS Rp/Rs | 0.14565 ± 0.00083 | ||||
ExoClock Observations |
||||
| Planet Observation Date |
Observer Observatory |
Telescope Camera / Filter / Exp [s] |
O-C minutes |
|
|---|---|---|---|---|
| Qatar-9b (LOW) 2025-12-27 | Jean-Claude MARIO Observatoire de la Cabergue | T 500 Cassegrain "Arp 83" ASI 6200 MM / Lum / 180.0 | -0.2 ± 0.59 | |
| Qatar-9b (LOW) 2025-12-27 | Matthieu Bachschmidt Gonachon | Celestron C11 SBIG ST8XME / AstrodonExoPlanet-BB / 120.0 | -1.12 ± 0.88 | |
| Qatar-9b (LOW) 2025-12-27 | Manfred Raetz privat observatory Herges-Hallenberg | SCT 280/1850 (C11 with Starizona reducer) Moravian Instruments G2-1600 / AstrodonExoPlanet-BB / 120.0 | -2.22 ± 0.85 | |
| Qatar-9b (LOW) 2025-12-24 | Michael Nezel Celle Observatory | CDK 14 QHY 268M / R / 180.0 | 0.4 ± 0.65 | |
| Qatar-9b (LOW) 2025-12-24 | Giovanni Calapai Home Astronomical Observatory | Celestron 11 Schmidt-Cassegrain Atik 314L+ / AstrodonExoPlanet-BB / 90.0 | 0.26 ± 1.12 | |
| Qatar-9b (LOW) 2025-06-19 | Adrian Jones Private Observatory (I64) | Meade ACF 30cm QSI 583 / Lum / 200.0 | -2.16 ± 1.87 | |
| Qatar-9b (LOW) 2025-04-19 | Stefan Brenner NOE Volkssternwarte AST | Martini-Truss mit Zambuto 11“ f/4,7 Omegon veTEC 571 C / Clear / 180.0 | 0.4 ± 1.28 | |
| Qatar-9b (LOW) 2025-04-06 | Pieter Vuylsteke PieterVuylsteke | Refract ZWO 2600mm mono ASP-C / rpr / 150.0 | -2.34 ± 0.98 | |
| Qatar-9b (LOW) 2025-04-02 | Simon Dawes William James II | Celestron Edge11 HD Risingcam Monochrome SONY imx571 / Clear / 300.0 | 0.2 ± 1.07 | |
| Qatar-9b (LOW) 2025-03-30 | Anaël Wünsche Observatoire des Baronnies Provençales | CDK Planewave 2 ZWO ASI6200 / R / 120.0 | 1.8 ± 0.84 | |
| Qatar-9b (LOW) 2025-03-30 | Adrian Schoner TURMX2 Observatory | Planeware CDK17 Moravian C1x 61000 Pro / Lum / 120.0 | 0.52 ± 0.68 | |
| Qatar-9b (LOW) 2025-03-30 | Mark Salisbury POST | Orion Optics ODK SBIG ST-10 XME / Clear / 240.0 | -0.4 ± 0.4 | |
| Qatar-9b (LOW) 2025-03-30 | Simon Dawes William James II | Celestron Edge11 HD Risingcam Monochrome SONY imx571 / Lum / 300.0 | -3.99 ± 2.02 | |
| Qatar-9b (LOW) 2025-03-20 | Manfred Raetz privat observatory Herges-Hallenberg | SCT 280/1850 (C11 with Starizona reducer) Moravian Instruments G2-1600 / AstrodonExoPlanet-BB / 120.0 | -0.61 ± 1.15 | |
| Qatar-9b (LOW) 2025-03-17 | Yves Jongen Rasteau Observatory | Plane Wave CDK 17" SBIG STXL 11002 / Lum / 120.0 | 0.62 ± 0.62 | |
| Qatar-9b (LOW) 2025-03-17 | Daniel BOUYSSE OAA46500 | RC TS-Optics f/6.4 ASI2600MC Pro / Lum / 300.0 | -5.6 ± 5.18 | |
| Qatar-9b (LOW) 2025-02-28 | Simon Dawes William James II | Celestron Edge11 HD Risingcam Monochrome SONY imx571 / Lum / 300.0 | 1.93 ± 1.44 | |
| Qatar-9b (LOW) 2025-02-28 | David Bennett Rickford Observatory | GSO RC ZWO ASI2600MM Pro / Lum / 180.0 | -0.66 ± 0.75 | |
| Qatar-9b (LOW) 2025-02-28 | Adrian Jones Private Observatory (I64) | Meade ACF 30cm QSI 583 / Lum / 300.0 | -3.97 ± 1.58 | |
| Qatar-9b (LOW) 2025-02-25 | Jordi González-Edo Landete-Kea | C11 ASI 2600MM pro / Lum / 90.0 | 0.71 ± 1.87 | |
| Qatar-9b (LOW) 2025-02-04 | Adrian Jones Private Observatory (I64) | Meade ACF 30cm QSI 583 / R / 200.0 | -0.9 ± 1.58 | |
| Qatar-9b (LOW) 2025-02-01 | Lionel Rousselot Private observatory Vierzon | Newton 250/740 ZWO 533 monochrome / Lum / 180.0 | -0.84 ± 1.11 | |
| Qatar-9b (LOW) 2025-01-29 | Vikrant Kumar Agnihotri Cepheid Observatory India | GSO Ritchey–Chrétien SX-35 TRIUS mono (KAF11002) / Clear / 120.0 | 0.4 ± 1.44 | |
| Qatar-9b (LOW) 2025-01-12 | Alessandro Marchini Astronomical Observatory University of Siena | Mak-Cas 0.3m f/5.6 Sbig STL-6303 / I / 300.0 | -0.56 ± 1.87 | |
| Qatar-9b (LOW) 2025-01-05 | Jordi González-Edo Landete-Kea | C11 ASI 2600MM pro / Lum / 120.0 | 3.42 ± 1.22 | |
| Qatar-9b (LOW) 2024-12-13 | Matthieu Bachschmidt Gonachon | Celestron C11 SBIG ST8XME / AstrodonExoPlanet-BB / 120.0 | 0.26 ± 0.73 | |
| Qatar-9b (LOW) 2024-11-29 | Deborah Smith Complejo Astronomico Los Coloraos, Gorafe | C9.25 QHY9 / R / 210.0 | -2.3 ± 1.87 | |
| Qatar-9b (LOW) 2024-06-25 | Martin Crow Burnham Observatory | Celestron C9.25 SX694 mono / Clear / 300.0 | -0.28 ± 2.88 | |
| Qatar-9b (LOW) 2024-05-15 | Ian Sharp PixelSkies | Celestron C11 Edge HD Starlight Xpress Trius Pro SX694 / R / 180.0 | 0.11 ± 1.73 | |
| Qatar-9b (LOW) 2024-05-15 | Adrian Jones Private Observatory (I64) | Meade ACF 30cm QSI 583 / Lum / 200.0 | -0.4 ± 1.18 | |
| Qatar-9b (LOW) 2024-03-29 | Charles Miller Miller Observatory | Meade 12" LX850 QHY268M / R / 90.0 | -2.22 ± 1.07 | |
| Qatar-9b (LOW) 2024-03-23 | Mark Salisbury POST | Orion Optics ODK SBIG ST-10 XME / Clear / 240.0 | -0.15 ± 0.39 | |
| Qatar-9b (LOW) 2024-03-23 | Simon Dawes William James II | Celestron Edge11 HD Risingcam Monochrome SONY imx571 / Lum / 300.0 | -1.7 ± 1.73 | |
| Qatar-9b (LOW) 2024-03-23 | Martin Crow Burnham Observatory | Celestron C9.25 SX694 mono / Clear / 300.0 | -3.43 ± 3.31 | |
| Qatar-9b (LOW) 2024-03-16 | Mario Morales-Aimar Observatorio de Sencelles MPC K14 | Reflector 10" SBIG ST7-XME / Clear / 150.0 | -0.96 ± 1.11 | |
| Qatar-9b (LOW) 2024-02-18 | Jordi González-Edo Landete-Kea | C11 ASI 2600MM pro / Lum / 60.0 | -0.01 ± 1.05 | |
| Qatar-9b (LOW) 2024-02-18 | Esteban Reina Observatori de Masquefa | Meade LX200 ZWO ASI 294 MM Pro / R / 180.0 | -0.36 ± 1.2 | |
| Qatar-9b (LOW) 2024-02-11 | John Collins JC_Wrexham | Meade LX200GPS ASI-290m / Clear / 30.0 | -4.81 ± 1.35 | |
| Qatar-9b (LOW) 2024-01-22 | Ian Sharp PixelSkies | Celestron C11 Edge HD Starlight Xpress Trius Pro SX694 / R / 180.0 | -0.91 ± 1.87 | |
| Qatar-9b (LOW) 2024-01-13 | Changhyun Ryu Korea National University of Education MAO | Planwave CDK500 Moravian C3-61000 / gpr / 150.0 | -4.44 ± 2.02 | |
| Qatar-9b (LOW) 2023-12-23 | Ian Sharp PixelSkies | Celestron C11 Edge HD Starlight Xpress Trius Pro SX694 / R / 180.0 | -4.93 ± 2.3 | |
| Qatar-9b (LOW) 2023-12-16 | Robert Roth TURMX Observatory | CFF Telescopes 160mm APO ZWO ASI6200MM Pro / Lum / 120.0 | 1.71 ± 1.3 | |
| Qatar-9b (LOW) 2023-12-07 | Changhyun Ryu Korea National University of Education MAO | Planwave CDK500 Moravian C3-61000 / ipr / 150.0 | -0.83 ± 0.96 | |
| Qatar-9b (LOW) 2023-12-03 | Xavier Bros Anysllum | Newton Orion Optics 14" f4.6 ASI2600MM Pro / R / 60.0 | -1.79 ± 1.12 | |
| Qatar-9b (LOW) 2023-05-22 | Lorenzo Cabona OARPAF | Astelco T-800 STX-16801 SBIG / R / 210.0 | -0.6 ± 0.65 | |
| Qatar-9b (LOW) 2023-05-02 | Yves Jongen Rasteau Observatory | Plane Wave CDK 17" SBIG STXL 11002 / Lum / 120.0 | -2.24 ± 1.17 | |
| Qatar-9b (LOW) 2023-04-15 | Mark Salisbury POST | Orion Optics ODK SBIG ST-10 XME / Clear / 240.0 | 1.52 ± 0.59 | |
| Qatar-9b (LOW) 2023-04-11 | Bryan Martin Tiger Butte Observatory Remote | AG Optical IDK ZWO ASI 294 / Lum / 180.0 | -2.52 ± 1.12 | |
| Qatar-9b (LOW) 2023-03-06 | Yves Jongen Rasteau Observatory | Plane Wave CDK 17" SBIG STXL 11002 / Lum / 180.0 | 4.85 ± 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 | -0.06 ± 0.76 | |
| Qatar-9b (LOW) 2023-03-03 | Eric Miny BLOIS SOLOGNE ASTRONOMIE OBSERVATORY | Newton T305 QSI 683WS / Lum / 180.0 | -1.57 ± 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 | -2.29 ± 1.44 | |
| Qatar-9b (LOW) 2023-02-17 | Miguel Ángel Álava Amat Sarriguren | Meade SC 8" Asi 1600 MM / Lum / 240.0 | 5.03 ± 2.16 | |
| Qatar-9b (LOW) 2023-02-14 | Anaël Wünsche Observatoire des Baronnies Provençales | CDK Planewave 2 ZWO ASI6200 / Clear / 120.0 | 1.23 ± 0.56 | |
| Qatar-9b (LOW) 2023-02-14 | Yves Jongen Rasteau Observatory | Plane Wave CDK 17" SBIG STXL 11002 / Lum / 120.0 | -0.54 ± 0.73 | |
| Qatar-9b (LOW) 2023-02-14 | Matthieu Bachschmidt Gonachon | Celestron C11 SBIG ST8XME / AstrodonExoPlanet-BB / 120.0 | -2.06 ± 0.78 | |
| Qatar-9b (LOW) 2023-02-14 | christian PANTACCHINI Observatoire de BENAYES | Skywhatcher Newton SBIG STF-8300M / Lum / 240.0 | -2.39 ± 1.73 | |
| Qatar-9b (LOW) 2023-02-11 | Yves Jongen Rasteau Observatory | Plane Wave CDK 17" SBIG STXL 11002 / Lum / 120.0 | 1.21 ± 0.89 | |
| Qatar-9b (LOW) 2023-02-04 | Robert Roth TURMX Observatory | Planewave CDK17 QHY600M / rpr / 120.0 | 0.76 ± 0.82 | |
| Qatar-9b (LOW) 2023-02-04 | Robert Roth TURMX Observatory | CFF Telescopes 160mm APO ZWO ASI6200MM Pro / Lum / 120.0 | -0.59 ± 1.28 | |
| Qatar-9b (LOW) 2023-02-01 | Javier Flores Martín CAHA | GSO40 zwo 1600mm pro / Lum / 45.0 | 1.53 ± 0.32 | |
| Qatar-9b (LOW) 2023-01-28 | Adam Popowicz Otivar dome2 | Newton 12" ASA ASI ZWO 1600MM / R / 240.0 | 0.11 ± 1.73 | |
| Qatar-9b (LOW) 2023-01-12 | Snaevarr Guðmundsson Ness Observatory | Meade LX 200 ACF Schmidt-Cassegrain SBIG STL 11000M / AstrodonExoPlanet-BB / 120.0 | -0.24 ± 1.08 | |
| Qatar-9b (LOW) 2022-10-20 | Adam Popowicz Observatory Pyskowice | RC12" GSO ASI ZWO 1600 MM / ATIK 11000M / R / 240.0 | -3.19 ± 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 | -0.73 ± 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 | -1.99 ± 1.73 | |
| Qatar-9b (LOW) 2022-04-25 | Robert Roth TURMX Observatory | CFF Telescopes 160mm APO ZWO ASI6200MM Pro / Lum / 120.0 | -1.8 ± 0.86 | |
| Qatar-9b (LOW) 2022-04-18 | Claudio Lopresti Claudio Lopresti | Meade LX200 12" CCD Sbig ST9xe / R / 180.0 | -1.94 ± 1.73 | |
| Qatar-9b (LOW) 2022-04-08 | Adam Popowicz Otivar dome2 | Newton 12" ASA ASI ZWO 1600MM / R / 240.0 | -1.03 ± 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 | -3.98 ± 1.73 | |
| Qatar-9b (LOW) 2022-03-09 | Ivo Peretto MarSEC Marana Space Explorer Center | R-C Moravia G2-1600 MkII / Clear / 180.0 | -0.26 ± 0.72 | |
| Qatar-9b (LOW) 2022-03-09 | Pieter Vuylsteke PieterVuylsteke | Refract ZWO 2600mm mono ASP-C / Clear / 360.0 | -1.41 ± 1.44 | |
| Qatar-9b (LOW) 2022-03-09 | Raniero Albanesi 157 Frasso Sabino | Cassegrain 14.5" FLI PROLINE PL1301E-1 / R / 120.0 | -1.85 ± 1.01 | |
| Qatar-9b (LOW) 2022-03-09 | Claudio Lopresti Claudio Lopresti | Meade LX200 12" CCD Sbig ST9xe / Lum / 180.0 | -2.13 ± 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 | 1.54 ± 3.17 | |
| Qatar-9b (LOW) 2022-02-23 | Claudio Lopresti Claudio Lopresti | Meade LX200 12" CCD Sbig ST9xe / Lum / 240.0 | -0.58 ± 1.3 | |
| Qatar-9b (LOW) 2022-02-10 | Tobias Gesser TURMX Observatory | CFF Telescopes 160mm APO ZWO ASI6200MM Pro / Lum / 120.0 | -1.33 ± 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 | -2.77 ± 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 | -2.4 ± 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 | -0.32 ± 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 | -3.48 ± 2.3 | |
| Qatar-9b (LOW) 2022-01-21 | Yves Jongen Rasteau Observatory | Plane Wave CDK 17" FLI Kepler CMOS 4040 / Lum / 120.0 | -0.34 ± 0.86 | |
| Qatar-9b (LOW) 2022-01-18 | Enrique Arce Vallbona Observatory | Newton 10" f4 Sbig ST7-XME / Clear / 180.0 | 3.19 ± 4.32 | |
| Qatar-9b (LOW) 2022-01-18 | Mark Salisbury POST | Orion Optics ODK SBIG ST-10 XME / R / 240.0 | -0.13 ± 0.72 | |
| Qatar-9b (LOW) 2022-01-18 | Kevin Johnson Holbrook Observatory | Meade LX10 EMC Atik 383L+ / Lum / 120.0 | -0.7 ± 2.02 | |
| Qatar-9b (LOW) 2022-01-18 | Gonzalo Fornas CAAT | TAKA FSQ 106 ASI 1600 / Clear / 120.0 | -1.13 ± 4.32 | |
| Qatar-9b (LOW) 2022-01-18 | Adam Popowicz Otivar dome2 | Newton 12" ASA ASI ZWO 1600MM / R / 240.0 | -1.57 ± 1.3 | |
| Qatar-9b (LOW) 2022-01-14 | Nikolaos Paschalis Nunki Observatory | Officina Stellare RILA 400 SBIG STXL 11002 / R / 60.0 | 4.84 ± 3.02 | |
| Qatar-9b (LOW) 2022-01-14 | Stéphane Montchaud Burgundy Observatory | Celestron 8 Zwo Asi 1600 / Lum / 120.0 | 2.54 ± 2.88 | |
| Qatar-9b (LOW) 2022-01-14 | Anaël Wünsche Observatoire des Baronnies Provençales | Astelco FLIPL230 / Clear / 120.0 | 0.96 ± 0.43 | |
| Qatar-9b (LOW) 2022-01-14 | Yves Jongen Rasteau Observatory | Plane Wave CDK 17" FLI Kepler CMOS 4040 / Lum / 120.0 | 0.96 ± 0.58 | |
| Qatar-9b (LOW) 2022-01-14 | Cyrille Aumasson observatory of Baronnies Provençales | CDK PLANEWAVE 17" zwo asi 6200 / Clear / 120.0 | 0.96 ± 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 | -0.63 ± 2.45 | |
| Qatar-9b (LOW) 2022-01-14 | Pierre Barroy Télescope JM Salomon, Planète Sciences, Buthiers | Newton STT 8300 / R / 60.0 | -1.06 ± 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 | -2.21 ± 1.3 | |
| Qatar-9b (LOW) 2022-01-11 | Tõnis Eenmäe Tartu Observatory | Planewave CDK 12.5 Apogee Alta U42 / Lum / 120.0 | 1.35 ± 0.91 | |
| Qatar-9b (LOW) 2022-01-07 | Robert Roth TURMX Observatory | CFF Telescopes 160mm APO ZWO ASI6200MM Pro / rpr / 120.0 | -0.08 ± 0.86 | |
| Qatar-9b (LOW) 2022-01-04 | Adam Popowicz Otivar dome2 | Newton 12" ASA ASI ZWO 1600MM / R / 240.0 | -2.6 ± 1.3 | |
| Qatar-9b (LOW) 2022-01-01 | Sebastien Brouillard AstroQueyras | RC500 STX16803 / R / 120.0 | 4.38 ± 1.44 | |
| Qatar-9b (LOW) 2022-01-01 | Matthieu Bachschmidt Gonachon | Celestron C11 SBIG ST8XME / AstrodonExoPlanet-BB / 120.0 | 0.64 ± 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 | -0.72 ± 0.58 | |
| Qatar-9b (LOW) 2021-12-15 | Fabio Mortari Hypatia Observatory | Ritchey Chretienne 250mm f/5.3 Sbig ST8-XE / R / 150.0 | 0.97 ± 2.02 | |
| Qatar-9b (LOW) 2021-12-15 | Jean-Baptiste Marquette MrKite47 | Newton Sky-Watcher 200/1000 ZWO ASI183MM Pro / R / 360.0 | 0.83 ± 2.88 | |
| Qatar-9b (LOW) 2021-12-15 | Adam Popowicz Otivar dome2 | Newton 12" ASA ASI ZWO 1600MM / R / 240.0 | 0.25 ± 1.15 | |
| Qatar-9b (LOW) 2021-12-15 | Alvaro Fornas Centro Astronómico Alto Turia (CAAT). MPC J57 | Planewave CDK 17" Sbig STXL 11002 / Clear / 180.0 | -0.04 ± 0.72 | |
| Qatar-9b (LOW) 2021-12-12 | Yves Jongen Rasteau Observatory | Plane Wave CDK 17" SBIG STXL 11002 / Lum / 120.0 | 0.61 ± 1.01 | |
| Qatar-9b (LOW) 2021-12-12 | Robert Roth TURMX Observatory | Planewave CDK17 QHY600M / rpr / 120.0 | -0.11 ± 0.86 | |
| Qatar-9b (LOW) 2021-12-12 | Robert Roth TURMX Observatory | CFF Telescopes 160mm APO ZWO ASI6200MM Pro / Lum / 120.0 | -0.25 ± 0.86 | |
| Qatar-9b (LOW) 2021-12-12 | Jean-Bernard Pioppa La Roque-Esclapon | KEPLER ATIK 383 L+ / R / 300.0 | -1.55 ± 1.58 | |
| Qatar-9b (LOW) 2021-11-28 | Robert Roth TURMX Observatory | Planewave CDK17 QHY600M / rpr / 120.0 | -0.86 ± 0.43 | |
| Qatar-9b (LOW) 2021-11-28 | Robert Roth TURMX Observatory | CFF Telescopes 160mm APO ZWO ASI6200MM Pro / Lum / 120.0 | -1.14 ± 1.01 | |
| Qatar-9b (LOW) 2021-11-25 | Adam Popowicz Observatory Pyskowice | RC12" GSO ASI ZWO 1600 MM / ATIK 11000M / R / 480.0 | 0.08 ± 2.02 | |
| Qatar-9b (LOW) 2021-11-21 | Nataliia Maslennikova Caucasus Mountain Observatory SAI MSU | RC-600 ASA Andor iKon-L / R / 60.0 | -1.67 ± 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 | -3.87 ± 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 | -0.01 ± 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) 2022-02-23 | TESS | -2.57 ± 1.3 | ||
| Qatar-9b (LOW) 2022-02-22 | TESS | -1.55 ± 0.95 | ||
| Qatar-9b (LOW) 2022-02-20 | TESS | -1.86 ± 1.14 | ||
| Qatar-9b (LOW) 2022-02-19 | TESS | 1.4 ± 1.01 | ||
| Qatar-9b (LOW) 2022-02-17 | TESS | -0.78 ± 1.08 | ||
| Qatar-9b (LOW) 2022-02-16 | TESS | -0.64 ± 0.98 | ||
| Qatar-9b (LOW) 2022-02-10 | TESS | 1.55 ± 1.02 | ||
| Qatar-9b (LOW) 2022-02-08 | TESS | 0.14 ± 1.09 | ||
| Qatar-9b (LOW) 2022-02-07 | TESS | -0.04 ± 0.94 | ||
| Qatar-9b (LOW) 2022-02-05 | TESS | -0.68 ± 1.01 | ||
| Qatar-9b (LOW) 2022-02-03 | TESS | -0.86 ± 1.01 | ||
| Qatar-9b (LOW) 2022-02-02 | TESS | -1.34 ± 1.24 | ||
| Qatar-9b (LOW) 2022-01-31 | TESS | 1.13 ± 1.35 | ||
| Qatar-9b (LOW) 2021-08-18 | TESS | 2.41 ± 1.27 | ||
| Qatar-9b (LOW) 2021-08-16 | TESS | -0.48 ± 1.58 | ||
| Qatar-9b (LOW) 2021-08-15 | TESS | 0.35 ± 1.44 | ||
| Qatar-9b (LOW) 2021-08-13 | TESS | 0.07 ± 1.17 | ||
| Qatar-9b (LOW) 2021-08-12 | TESS | -1.79 ± 1.2 | ||
| Qatar-9b (LOW) 2021-08-10 | TESS | -0.34 ± 1.11 | ||
| Qatar-9b (LOW) 2021-08-09 | TESS | 0.43 ± 1.43 | ||
| Qatar-9b (LOW) 2021-08-07 | TESS | 0.75 ± 1.44 | ||
| Qatar-9b (LOW) 2021-08-04 | TESS | -0.38 ± 1.18 | ||
| Qatar-9b (LOW) 2021-08-03 | TESS | 0.04 ± 1.34 | ||
| Qatar-9b (LOW) 2021-08-01 | TESS | -1.3 ± 1.21 | ||
| Qatar-9b (LOW) 2021-07-30 | TESS | 0.82 ± 1.37 | ||
| Qatar-9b (LOW) 2021-07-29 | TESS | 0.63 ± 1.22 | ||
| Qatar-9b (LOW) 2021-07-27 | TESS | -0.63 ± 0.99 | ||
| Qatar-9b (LOW) 2021-07-26 | TESS | -0.54 ± 1.44 | ||
| Qatar-9b (LOW) 2021-07-24 | TESS | 0.36 ± 1.28 | ||
ETD Observations |
||||
| Planet Observation Date |
Observer(s) | ETD link | O-C minutes |
|
| Qatar-9b (LOW) 2021-04-20 | Joe Garlitz | 1618930621 | 0.13 ± 1.3 | |
| Qatar-9b (LOW) 2021-04-17 | Joe Garlitz | 1618672934 | 1.5 ± 1.01 | |
| Qatar-9b (LOW) 2021-04-07 | Anaël Wünsche | 1617907365 | -0.15 ± 1.01 | |
| Qatar-9b (LOW) 2021-04-04 | Vrašťák M | 1617639707 | 1.5 ± 1.3 | |
| Qatar-9b (LOW) 2021-04-04 | Marc Bretton | 1617575505 | 0.45 ± 0.33 | |
| Qatar-9b (LOW) 2021-03-15 | Matteo Cataneo, Emanuele Russo, Filippo Leveraro | 1616003656 | 1.19 ± 0.72 | |
Literature Mid-times |
||||
| Planet Observation Date |
Reference | O-C minutes |
||
| 2018-04-19 | Alsubai et al. 2019 | 0.18 ± 0.39 | ||