This page summarises the information held within TEPCat for the transiting system K2-228b. Please see here for descriptions of the quantities given below.
| Quantity | Value | Unit |
|---|---|---|
| Reference of discovery paper | 2018AJ....156...78L | |
| Date of discovery paper | 2018 / 7 / 2 | y / m / d |
| Data/telescope used for discovery | K2 | |
| Right ascension | 12 29 10.74 | h m s |
| Declination | −06 50 03.3 | d m s |
| Right ascension (decimal) | 187.29475 | degrees |
| Declination (decimal) | -6.83425 | degrees |
| V-band apparent magnitude | 12.39 | mag |
| K-band apparent magnitude | 10.32 | mag |
| Transit duration | 0.0768 ( 1.843 ) | day hour |
| Transit depth | 0.03 | % |
| Time of mid-transit | 2457583.19430 ± 0.00390 | HJD or BJD |
| Orbital period | 2.6982800 ± 0.0002200 | days |
| Reference for orbital ephemeris | 2018AJ....156...78L |
| Quantity | Value | Unit |
|---|---|---|
| Stellar effective temperature | 4715 +48 −46 | K |
| Stellar metal abundance ([Fe/H] or [M/H]) | −0.25 ± 0.06 | dex |
| Stellar mass | 0.710 ± 0.020 | Msun |
| Stellar radius | 0.650 ± 0.010 | Rsun |
| Stellar logarithmic surface gravity | 4.660 ± 0.010 | c.g.s. |
| Stellar mean density | 3.300 +1.200 −1.800 ( 4.7 +1.7 −2.5 ) | ρsun g cm-3 |
| Orbital eccentricity | ||
| Orbital semimajor axis | 0.03380 ± 0.00030 | AU |
| Planetary mass | Mjup Mearth | |
| Planetary radius | 0.108 +0.009 −0.005 ( 1.211 +0.101 −0.056 ) | Rjup Rearth |
| Planetary surface gravity | m/s2 log(cgs) | |
| Planetary mean density | ρjup g cm-3 | |
| Planetary equilibrium temperature | 914 +14 −13 | K |
| Reference of detailed study | 2018AJ....156...78L |
K2-228b does not have an entry in the catalogue of orbital obliquity measurements.
Page generated on 2025/08/27 John Southworth (Keele University, UK)