| The Star | |||||
|---|---|---|---|---|---|
| Simbad GAIA 2MASS |
G 268-143 DR2 2353440974955205632 J01161854-2057075 |
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| RA | 01:16:18.5352 | DEC | -20:57:07.932 | ||
| Parallax 15.434 mas |
P.M. RA -115.432 mas/y |
P.M. DEC -249.177 mas/y |
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| MagV 13.5 |
MagR* 12.586 |
MagI* 11.525 |
MagJ 10.403 |
MagH 9.767 |
MagK 9.557 |
| MagG 12.79 |
MagGBP 13.887 |
MagGRP 11.76 |
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| *Calculated from GAIA magnitudes. | |||||
Ephemeris
- Verified 
|
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|---|---|---|---|---|---|
| Kokori et al. 2025 | |||||
| Mid-time 2458704.5116 ± 0.00096 BJDTDB |
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| Period 3.993422 ± 1.1e-05 days |
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| Transit Parameters | |||||
| Magliano et al. 2023 | |||||
| Rp/Rs 0.0675 ± 0.0066 |
a/Rs 18.75 +0.65 -0.65 |
i 88.9 +0.5 -0.4 deg |
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| e - |
ω - deg |
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| DepthR* 5.99 mmag |
Duration* 1.64 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 | |||||
| Magliano et al. 2023 | |||||
| Teff 4031.0 +21.0 -23.0 K |
Log(g) 4.58 +0.1 -0.13 cm/s2 |
Fe/H -0.01 +0.07 -0.09 dex |
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| ExoClock Status | |||||
|---|---|---|---|---|---|
| Observing Priority | ALERT | ||||
| Minimum aperture | 16.95" | ||||
| Total Observations (Recent) | 13 (0) | ||||
| O-C | 310.45 ± 0.81 minutes | ||||
| ExoClock Observations (Recent) | 5 (0) | ||||
| Space Observations (Recent) | 8 (0) | ||||
| ETD Observations (Recent) | 0 (0) | ||||
| Literature Mid-times (Recent) | 0 (0) | ||||
| Kepler Rp/Rs | - | ||||
| TESS Rp/Rs | 0.069 ± 0.0023 | ||||
ExoClock Observations |
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| Planet Observation Date |
Observer Observatory |
Telescope Camera / Filter / Exp [s] |
O-C minutes |
|
|---|---|---|---|---|
| TOI-277b (ALERT) 2024-11-14 | Karolina Prucnal DeepSkyChile - ROTUZ | PlaneWave CDK 20 QHY268M pro / Lum / 180.0 | 337.24 ± 3.74 | |
| TOI-277b (ALERT) 2024-10-29 | Karolina Prucnal DeepSkyChile - ROTUZ | PlaneWave CDK 20 QHY268M pro / Lum / 60.0 | 381.86 ± 2.02 | |
| TOI-277b (ALERT) 2024-10-09 | Jean-Pascal Vignes Deep Sky Chile | Planewave CDK400 QHYCCD 600M / Lum / 90.0 | 324.86 ± 2.16 | |
| TOI-277b (ALERT) 2024-10-01 | Trinidad Poyato romero iac 80 (El Teide) | quatorial german mount ccd Total CCD size: 4096 (horizontal) x 4112 (vertical) pixels Pixel size: 15×15 µm Pixel scale: 0.322 “/pixel / I / 100.0 | 362.36 ± 2.3 | |
| TOI-277b (ALERT) 2024-08-14 | Yves Jongen Deep Sky Chile | Plane Wave CDK 17" Moravian 4G / Lum / 120.0 | 270.64 ± 1.11 | |
Space Observations |
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| Planet Observation Date |
Mission | O-C minutes |
||
| TOI-277b (ALERT) 2020-10-13 | TESS | 5.36 ± 7.2 | ||
| TOI-277b (ALERT) 2020-10-09 | TESS | -2.96 ± 3.74 | ||
| TOI-277b (ALERT) 2020-10-01 | TESS | -4.77 ± 3.17 | ||
| TOI-277b (ALERT) 2020-09-27 | TESS | 6.5 ± 3.31 | ||
| TOI-277b (ALERT) 2018-10-13 | TESS | -2.23 ± 4.03 | ||
| TOI-277b (ALERT) 2018-10-09 | TESS | -0.04 ± 14.11 | ||
| TOI-277b (ALERT) 2018-10-05 | TESS | 4.31 ± 3.17 | ||
| TOI-277b (ALERT) 2018-10-01 | TESS | -1.27 ± 2.16 | ||