This page summarises the information held within TEPCat for the transiting system K2-117b. Please see here for descriptions of the quantities given below.
| Quantity | Value | Unit |
|---|---|---|
| Reference of discovery paper | 2018AJ....156..277L | |
| Date of discovery paper | 2018 / 10 / 10 | y / m / d |
| Data/telescope used for discovery | K2 | |
| Right ascension | 08 55 25.36 | h m s |
| Declination | +10 28 08.8 | d m s |
| Right ascension (decimal) | 133.85567 | degrees |
| Declination (decimal) | 10.46911 | degrees |
| V-band apparent magnitude | 13.57 | mag |
| K-band apparent magnitude | 10.59 | mag |
| Transit duration | 0.0516 ( 1.238 ) | day hour |
| Transit depth | 0.13 | % |
| Time of mid-transit | 2457142.77452 ± 0.00162 | HJD or BJD |
| Orbital period | 1.2916000 ± 0.0000490 | days |
| Reference for orbital ephemeris | 2018AJ....156..277L |
| Quantity | Value | Unit |
|---|---|---|
| Stellar effective temperature | 3778 ± 53 | K |
| Stellar metal abundance ([Fe/H] or [M/H]) | −0.05 ± 0.13 | dex |
| Stellar mass | 0.540 ± 0.010 | Msun |
| Stellar radius | 0.510 ± 0.010 | Rsun |
| Stellar logarithmic surface gravity | 4.750 ± 0.010 | c.g.s. |
| Stellar mean density | 3.934 +2.046 −1.521 ( 5.6 +2.9 −2.1 ) | ρsun g cm-3 |
| Orbital eccentricity | ||
| Orbital semimajor axis | 0.01890 ± 0.00010 | AU |
| Planetary mass | Mjup Mearth | |
| Planetary radius | 0.181 ± 0.009 ( 2.03 ± 0.10 ) | Rjup Rearth |
| Planetary surface gravity | m/s2 log(cgs) | |
| Planetary mean density | ρjup g cm-3 | |
| Planetary equilibrium temperature | 868 ± 14 | K |
| Reference of detailed study | 2018AJ....156..277L |
K2-117b does not have an entry in the catalogue of orbital obliquity measurements.
Page generated on 2025/08/27 John Southworth (Keele University, UK)