This page summarises the information held within TEPCat for the transiting planetary system K2-157b. Please see here for descriptions of the quantities given below.
| Quantity | Value | Unit |
|---|---|---|
| Reference of discovery paper | 2025A+A...699A.344C | |
| Date of discovery paper | 2025 / 4 / 30 | y / m / d |
| Data/telescope used for discovery | K2 | |
| Right ascension | 12 15 00.36 | h m s |
| Declination | −05 46 55.3 | d m s |
| Right ascension (decimal) | 183.75150 | degrees |
| Declination (decimal) | -5.78203 | degrees |
| V-band apparent magnitude | 12.79 | mag |
| K-band apparent magnitude | 11.02 | mag |
| Transit duration | 0.0484 ( 1.162 ) | day hour |
| Transit depth | 0.015 | % |
| Time of mid-transit | 2457582.8220 ± 0.0037 | HJD or BJD |
| Orbital period | 0.3652575 ± 0.0000073 | days |
| Reference for orbital ephemeris | 2025A+A...699A.344C |
| Quantity | Value | Unit |
|---|---|---|
| Stellar effective temperature | 5334 ± 64 | K |
| Stellar metal abundance ([Fe/H] or [M/H]) | +0.02 ± 0.04 | dex |
| Stellar mass | 0.890 ± 0.029 | Msun |
| Stellar radius | 0.860 ± 0.019 | Rsun |
| Stellar logarithmic surface gravity | 4.45 ± 0.04 | c.g.s. |
| Stellar mean density | ρsun g cm-3 | |
| Orbital eccentricity | 0.0 | |
| Orbital semimajor axis | 0.00962 ± 0.00010 | AU |
| Planetary mass | 0.0036 ± 0.0013 ( 1.14 ± 0.41 ) | Mjup Mearth |
| Planetary radius | 0.0834 ± 0.0081 ( 0.935 ± 0.091 ) | Rjup Rearth |
| Planetary surface gravity | 12.8 ± 5.3 3.1 ± 0.2 | m/s2 log(cgs) |
| Planetary mean density | 5.8 ± 2.7 ( 7.7 ± 3.6 ) | ρjup g cm-3 |
| Planetary equilibrium temperature | 2432 ± 42 | K |
| Reference of detailed study | 2025A+A...699A.344C |
K2-157b does not have an entry in the catalogue of orbital obliquity measurements.
Page generated on 2025/08/27 John Southworth (Keele University, UK)