This page summarises the information held within TEPCat for the transiting system K2-122b. 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 25 54.31 | h m s |
| Declination | +20 21 34.4 | d m s |
| Right ascension (decimal) | 126.47629 | degrees |
| Declination (decimal) | 20.35956 | degrees |
| V-band apparent magnitude | 12.12 | mag |
| K-band apparent magnitude | 9.28 | mag |
| Transit duration | 0.0692 ( 1.661 ) | day hour |
| Transit depth | 0.03 | % |
| Time of mid-transit | 2457144.05009 ± 0.00235 | HJD or BJD |
| Orbital period | 2.2192820 ± 0.0001280 | days |
| Reference for orbital ephemeris | 2018AJ....156..277L |
| Quantity | Value | Unit |
|---|---|---|
| Stellar effective temperature | 4027 ± 45 | K |
| Stellar metal abundance ([Fe/H] or [M/H]) | 0.06 ± 0.11 | dex |
| Stellar mass | 0.620 ± 0.010 | Msun |
| Stellar radius | 0.600 ± 0.010 | Rsun |
| Stellar logarithmic surface gravity | 4.680 ± 0.010 | c.g.s. |
| Stellar mean density | 4.922 +2.701 −1.964 ( 6.9 +3.8 −2.8 ) | ρsun g cm-3 |
| Orbital eccentricity | ||
| Orbital semimajor axis | 0.02850 ± 0.00020 | AU |
| Planetary mass | Mjup Mearth | |
| Planetary radius | 0.108 ± 0.007 ( 1.211 ± 0.078 ) | Rjup Rearth |
| Planetary surface gravity | m/s2 log(cgs) | |
| Planetary mean density | ρjup g cm-3 | |
| Planetary equilibrium temperature | 814 ± 10 | K |
| Reference of detailed study | 2018AJ....156..277L |
K2-122b does not have an entry in the catalogue of orbital obliquity measurements.
Page generated on 2025/08/27 John Southworth (Keele University, UK)