| The Star | |||||
|---|---|---|---|---|---|
| Simbad GAIA 2MASS |
HD 82139 DR2 646125297938578944 J09305841+2632246 |
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| RA | 09:30:58.4266 | DEC | +26:32:24.595 | ||
| Parallax 4.337 mas |
P.M. RA -7.999 mas/y |
P.M. DEC -39.545 mas/y |
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| MagV 9.72 |
MagR* 9.373 |
MagI* 9.061 |
MagJ 8.672 |
MagH 8.41 |
MagK 8.345 |
| MagG 9.584 |
MagGBP 9.905 |
MagGRP 9.141 |
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| *Calculated from GAIA magnitudes. | |||||
Ephemeris
- Verified 
|
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|---|---|---|---|---|---|
| Kokori et al. 2025 | |||||
| Mid-time 2459470.47469 ± 0.00031 BJDTDB |
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| Period 3.2087107 ± 3.5e-06 days |
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| Transit Parameters | |||||
| Khandelwal et al. 2021 | |||||
| Rp/Rs** 0.0661 ± 0.00053 |
a/Rs 4.83 +0.11 -0.16 |
i 78.41 +0.36 -0.58 deg |
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| e - |
ω - deg |
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| DepthR* 2.58 mmag |
Duration* 2.29 hours |
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|
*Calculated from the other parameters, using PyLightcurve.
**Adjusted based on the space observations. |
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| Limb Darkening Parameters | |||||
| Khandelwal et al. 2021 | |||||
| Teff 5991.0 +55.0 -55.0 K |
Log(g) 3.94 +0.02 -0.04 cm/s2 |
Fe/H 0.373 +0.071 -0.086 dex |
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| ExoClock Status | |||||
|---|---|---|---|---|---|
| Observing Priority | LOW | ||||
| Minimum aperture | 16.2" | ||||
| Total Observations (Recent) | 37 (4) | ||||
| O-C | 4.71 ± 1.96 minutes | ||||
| ExoClock Observations (Recent) | 9 (4) | ||||
| Space Observations (Recent) | 27 (0) | ||||
| ETD Observations (Recent) | 0 (0) | ||||
| Literature Mid-times (Recent) | 1 (0) | ||||
| Kepler Rp/Rs | - | ||||
| TESS Rp/Rs | 0.0661 ± 0.00053 | ||||
ExoClock Observations |
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| Planet Observation Date |
Observer Observatory |
Telescope Camera / Filter / Exp [s] |
O-C minutes |
|
|---|---|---|---|---|
| TOI-1789b (LOW) 2025-12-30 | Jean-Claude MARIO Observatoire de la Cabergue | T 500 Cassegrain "Arp 83" ASI 6200 MM / Clear / 30.0 | -0.61 ± 4.46 | |
| TOI-1789b (LOW) 2025-04-10 | Adrian Jones Private Observatory (I64) | Meade ACF 30cm QSI 583 / R / 120.0 | 5.12 ± 5.33 | |
| TOI-1789b (LOW) 2025-04-10 | Michael Nezel Celle Observatory | CDK 14 QHY 268M / R / 45.0 | -1.5 ± 5.04 | |
| TOI-1789b (LOW) 2025-03-25 | Livia Moretti Leavitt Observatory | Ritchey-Chrétien 10'' f/8 QHY268 / R / 60.0 | 2.03 ± 6.19 | |
| TOI-1789b (LOW) 2025-02-08 | Florence Libotte IAC 80 | IAC 80 equatorial german mount Camelot2 / R / 12.0 | 9.88 ± 3.02 | |
| TOI-1789b (LOW) 2024-01-20 | Matthieu Bachschmidt Gonachon | Celestron C11 SBIG ST8XME / R / 90.0 | -17.94 ± 5.9 | |
| TOI-1789b (LOW) 2023-04-19 | Synchronous Working-Group Multiple | Multiple Multiple / R / 45.0 | -5.38 ± 1.87 | |
| TOI-1789b (LOW) 2022-04-15 | Robert Roth TURMX Observatory | Planewave CDK17 QHY600M / rpr / 20.0 | 3.88 ± 5.33 | |
| TOI-1789b (LOW) 2022-04-15 | Synchronous Working-Group Multiple | Multiple Multiple / R / 30.0 | -2.6 ± 2.45 | |
Space Observations |
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| Planet Observation Date |
Mission | O-C minutes |
||
| TOI-1789b (LOW) 2022-02-23 | TESS | -0.77 ± 2.02 | ||
| TOI-1789b (LOW) 2022-02-20 | TESS | -2.63 ± 1.87 | ||
| TOI-1789b (LOW) 2022-02-17 | TESS | 1.28 ± 2.16 | ||
| TOI-1789b (LOW) 2022-02-10 | TESS | 3.61 ± 3.02 | ||
| TOI-1789b (LOW) 2022-02-07 | TESS | -3.57 ± 1.87 | ||
| TOI-1789b (LOW) 2022-02-04 | TESS | -3.85 ± 2.88 | ||
| TOI-1789b (LOW) 2022-02-01 | TESS | 2.94 ± 2.3 | ||
| TOI-1789b (LOW) 2021-12-27 | TESS | 2.1 ± 2.02 | ||
| TOI-1789b (LOW) 2021-12-24 | TESS | -0.62 ± 2.02 | ||
| TOI-1789b (LOW) 2021-12-21 | TESS | 5.01 ± 2.02 | ||
| TOI-1789b (LOW) 2021-12-15 | TESS | -0.43 ± 2.02 | ||
| TOI-1789b (LOW) 2021-12-11 | TESS | -2.43 ± 2.59 | ||
| TOI-1789b (LOW) 2021-12-08 | TESS | 2.91 ± 2.3 | ||
| TOI-1789b (LOW) 2021-12-05 | TESS | 2.64 ± 2.3 | ||
| TOI-1789b (LOW) 2021-11-28 | TESS | 2.09 ± 1.73 | ||
| TOI-1789b (LOW) 2021-11-25 | TESS | 0.96 ± 1.73 | ||
| TOI-1789b (LOW) 2021-11-22 | TESS | -1.91 ± 2.3 | ||
| TOI-1789b (LOW) 2021-11-19 | TESS | -0.31 ± 2.16 | ||
| TOI-1789b (LOW) 2021-11-16 | TESS | 4.89 ± 2.45 | ||
| TOI-1789b (LOW) 2021-11-12 | TESS | -1.57 ± 2.45 | ||
| TOI-1789b (LOW) 2021-11-09 | TESS | 4.49 ± 2.16 | ||
| TOI-1789b (LOW) 2021-11-03 | TESS | 1.35 ± 2.3 | ||
| TOI-1789b (LOW) 2021-10-31 | TESS | -1.08 ± 2.02 | ||
| TOI-1789b (LOW) 2021-10-27 | TESS | 0.09 ± 2.3 | ||
| TOI-1789b (LOW) 2021-10-21 | TESS | -1.32 ± 2.16 | ||
| TOI-1789b (LOW) 2021-10-18 | TESS | 2.58 ± 2.02 | ||
| TOI-1789b (LOW) 2021-10-15 | TESS | -0.86 ± 2.3 | ||
Literature Mid-times |
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| Planet Observation Date |
Reference | O-C minutes |
||
| 2020-01-25 | Khandelwal et al. 2022 | -1.09 ± 0.89 | ||