This page summarises the information held within TEPCat for the transiting planetary system HD 28109c. Please see here for descriptions of the quantities given below.
| Quantity | Value | Unit |
|---|---|---|
| Reference of discovery paper | 2022MNRAS.515.1328D | |
| Date of discovery paper | 2022 / 5 / 19 | y / m / d |
| Data/telescope used for discovery | TESS | |
| Right ascension | 04 20 57.13 | h m s |
| Declination | −68 06 09.5 | d m s |
| Right ascension (decimal) | 65.23804 | degrees |
| Declination (decimal) | -68.10264 | degrees |
| V-band apparent magnitude | 9.38 | mag |
| K-band apparent magnitude | 8.81 | mag |
| Transit duration | 0.3732 ( 8.957 ) | day hour |
| Transit depth | 0.08 | % |
| Time of mid-transit | 2458337.2807 ± 0.0052 | HJD or BJD |
| Orbital period | 55.99712 ± 0.00036 | days |
| Reference for orbital ephemeris | 2025A+A...704A..41B |
| Quantity | Value | Unit |
|---|---|---|
| Stellar effective temperature | 6189 ± 55 | K |
| Stellar metal abundance ([Fe/H] or [M/H]) | +0.10 ± 0.03 | dex |
| Stellar mass | 1.227 ± 0.052 | Msun |
| Stellar radius | 1.425 +0.048 −0.041 | Rsun |
| Stellar logarithmic surface gravity | 4.25 ± 0.07 | c.g.s. |
| Stellar mean density | ρsun g cm-3 | |
| Orbital eccentricity | 0.0 +0.12 −0.0 | |
| Orbital semimajor axis | 0.308 ± 0.011 | AU |
| Planetary mass | 0.0289 ± 0.0063 ( 9.2 ± 2.0 ) | Mjup Mearth |
| Planetary radius | 0.368 +0.014 −0.012 ( 4.12 +0.16 −0.13 ) | Rjup Rearth |
| Planetary surface gravity | m/s2 log(cgs) | |
| Planetary mean density | 0.52 ± 0.15 ( 0.69 ± 0.20 ) | ρjup g cm-3 |
| Planetary equilibrium temperature | 643 ± 12 | K |
| Reference of detailed study | 2025A+A...704A..41B |
HD 28109c does not have an entry in the catalogue of orbital obliquity measurements.
Page generated on 2026/01/29 John Southworth (Keele University, UK)