| The Star | |||||
|---|---|---|---|---|---|
| Simbad GAIA 2MASS |
Qatar 7 DR2 2878923523472328704 J23540364+3701185 |
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| RA | 23:54:03.6389 | DEC | +37:01:18.584 | ||
| Parallax 1.388 mas |
P.M. RA -5.189 mas/y |
P.M. DEC -1.129 mas/y |
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| MagV 13.03 |
MagR 13.02 |
MagI 12.878 |
MagJ 11.859 |
MagH 11.599 |
MagK 11.561 |
| MagG 12.927 |
MagGBP 13.267 |
MagGRP 12.43 |
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| *Calculated from GAIA magnitudes. | |||||
Ephemeris
- Verified 
|
|||||
|---|---|---|---|---|---|
| Kokori et al. 2022 | |||||
| Mid-time 2458303.419733 ± 9.3e-05 BJDTDB |
|||||
| Period 2.03202332 ± 3.3e-07 days |
|||||
| Transit Parameters | |||||
| Alsubai et al. 2019 | |||||
| Rp/Rs 0.11 ± 0.001 |
a/Rs 4.84 +0.05 -0.05 |
i 89.0 +1.0 -1.0 deg |
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| e - |
ω - deg |
||||
| DepthR* 15.92 mmag |
Duration* 3.58 hours |
||||
|
*Calculated from the other parameters, using PyLightcurve.
**Adjusted based on the space observations. |
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| Limb Darkening Parameters | |||||
| Alsubai et al. 2019 | |||||
| Teff 6387.0 +38.0 -38.0 K |
Log(g) 4.2 +0.03 -0.03 cm/s2 |
Fe/H 0.276 +0.071 -0.071 dex |
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| ExoClock Status | |||||
|---|---|---|---|---|---|
| Observing Priority | LOW | ||||
| Minimum aperture | 7.96" | ||||
| Total Observations (Recent) | 12 (4) | ||||
| O-C | 0.35 ± 0.44 minutes | ||||
| ExoClock Observations (Recent) | 11 (4) | ||||
| Space Observations (Recent) | 0 (0) | ||||
| ETD Observations (Recent) | 0 (0) | ||||
| Literature Mid-times (Recent) | 1 (0) | ||||
| Kepler Rp/Rs | - | ||||
| TESS Rp/Rs | - | ||||
ExoClock Observations |
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| Planet Observation Date |
Observer Observatory |
Telescope Camera / Filter / Exp [s] |
O-C minutes |
|
|---|---|---|---|---|
| Qatar-7b (LOW) 2022-10-21 | Vikrant Kumar Agnihotri Cepheid Observatory India | GSO Ritchey–Chrétien SX-35 TRIUS mono (KAF11002) / Lum / 120.0 | 6.54 ± 3.31 | |
| Qatar-7b (LOW) 2022-09-08 | David Arnot OSO PIRATE | PlaneWave Instruments CDK24 24 inch (610 mm) f/6.5 Corrected Dall-Kirkham Astrograph FLI ProLine KAF-16803 / R / 70.0 | -0.62 ± 1.41 | |
| Qatar-7b (LOW) 2022-09-06 | Robert Roth TURMX Observatory | CFF Telescopes 160mm APO ZWO ASI6200MM Pro / Lum / 120.0 | 4.83 ± 2.02 | |
| Qatar-7b (LOW) 2022-07-28 | Bryan Martin Tiger Butte Observatory | AG Optical IDK ZWO ASI 294 / Clear / 120.0 | -4.44 ± 2.88 | |
| Qatar-7b (LOW) 2021-12-18 | Michael Irzyk Melun | C14 H694 / AstrodonExoPlanet-BB / 60.0 | 2.68 ± 1.87 | |
| Qatar-7b (LOW) 2021-12-18 | Yves Jongen Rasteau Observatory | Plane Wave CDK 17" SBIG STXL 11002 / Lum / 120.0 | -0.49 ± 1.58 | |
| Qatar-7b (LOW) 2021-12-16 | Claudio Lopresti Claudio Lopresti | Meade LX200 12" CCD Sbig ST9xe / Lum / 180.0 | 1.13 ± 4.32 | |
| Qatar-7b (LOW) 2021-12-16 | Fabio Mortari Hypatia Observatory | Ritchey Chretienne 250mm f/5.3 Sbig ST8-XE / R / 250.0 | -3.19 ± 4.32 | |
| Qatar-7b (LOW) 2021-12-14 | Stephen M. Brincat Flarestar Observatory - MPC Code:171 | Meade SCT Moravian G2-1600 / AstrodonExoPlanet-BB / 120.0 | 3.47 ± 2.02 | |
| Qatar-7b (LOW) 2021-12-02 | Chia-Ming Chang NTHU Observatory | Showa 250mm Refractor ASI 6200MM Pro / Lum / 60.0 | -0.65 ± 2.74 | |
| Qatar-7b (LOW) 2021-11-26 | Taewoo Kim Deokheung Optical Astronomy Observatory | NYSC 1m Telescope FLI PL-16803 or PI SOPHIA-2048B / R / 120.0 | -0.12 ± 0.58 | |
Literature Mid-times |
||||
| Planet Observation Date |
Reference | O-C minutes |
||
| 2017-10-16 | Alsubai et al. 2019 | 0.0 ± 0.23 | ||