| The Star | |||||
|---|---|---|---|---|---|
| Simbad GAIA 2MASS |
HD 28109 DR2 4668163021600295552 J04205712-6806095 |
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| RA | 04:20:57.1321 | DEC | -68:06:09.514 | ||
| Parallax 7.134 mas |
P.M. RA 22.028 mas/y |
P.M. DEC -10.4 mas/y |
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| MagV 9.38 |
MagR* 9.104 |
MagI* 8.789 |
MagJ 8.476 |
MagH 8.256 |
MagK 8.175 |
| MagG 9.3 |
MagGBP 9.587 |
MagGRP 8.902 |
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| *Calculated from GAIA magnitudes. | |||||
Ephemeris
- Verified 
|
|||||
|---|---|---|---|---|---|
| Kokori et al. 2025 | |||||
| Mid-time 2458439.9242 ± 0.0053 BJDTDB |
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| Period 84.2574 ± 0.0025 days |
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| Transit Parameters | |||||
| Dransfield et al. 2022 | |||||
| Rp/Rs 0.01999 ± 0.00035 |
a/Rs 61.1 +2.4 -2.4 |
i 89.682 +0.093 -0.082 deg |
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| e - |
ω - deg |
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| DepthR* 0.51 mmag |
Duration* 10.13 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 | |||||
| Dransfield et al. 2022 | |||||
| Teff 6120.0 +50.0 -50.0 K |
Log(g) 4.13 +0.1 -0.1 cm/s2 |
Fe/H 0.0 +0.1 -0.1 dex |
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| ExoClock Status | |||||
|---|---|---|---|---|---|
| Observing Priority | HIGH | ||||
| Minimum aperture | 62.71" | ||||
| Total Observations (Recent) | 5 (0) | ||||
| O-C | - | ||||
| ExoClock Observations (Recent) | 0 (0) | ||||
| Space Observations (Recent) | 5 (0) | ||||
| ETD Observations (Recent) | 0 (0) | ||||
| Literature Mid-times (Recent) | 0 (0) | ||||
| Kepler Rp/Rs | - | ||||
| TESS Rp/Rs | 0.02052 ± 0.00062 | ||||
Space Observations |
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| Planet Observation Date |
Mission | O-C minutes |
||
|---|---|---|---|---|
| HD28109d (HIGH) 2021-06-01 | TESS | 48.1 ± 25.92 | ||
| HD28109d (HIGH) 2019-05-04 | TESS | -37.15 ± 14.4 | ||
| HD28109d (HIGH) 2019-02-09 | TESS | -26.78 ± 15.84 | ||
| HD28109d (HIGH) 2018-11-17 | TESS | -14.26 ± 9.22 | ||
| HD28109d (HIGH) 2018-08-25 | TESS | 18.58 ± 13.68 | ||
Literature Mid-times |
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| Planet Observation Date |
Reference | O-C minutes |
||
| 2018-08-25 | Dransfield et al. 2022 | 9.27 ± 6.22 | ||