This page summarises the information held within TEPCat for the transiting system K2-255b. 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 39 39.11 | h m s |
| Declination | −03 22 13.9 | d m s |
| Right ascension (decimal) | 189.91296 | degrees |
| Declination (decimal) | -3.37053 | degrees |
| V-band apparent magnitude | 13.01 | mag |
| K-band apparent magnitude | 10.83 | mag |
| Transit duration | 0.0732 ( 1.757 ) | day hour |
| Transit depth | 0.15 | % |
| Time of mid-transit | 2457583.30150 ± 0.00080 | HJD or BJD |
| Orbital period | 1.9641700 ± 0.0000400 | days |
| Reference for orbital ephemeris | 2018AJ....156...78L |
| Quantity | Value | Unit |
|---|---|---|
| Stellar effective temperature | 4676 +63 −61 | K |
| Stellar metal abundance ([Fe/H] or [M/H]) | −0.14 +0.07 −0.06 | dex |
| Stellar mass | 0.710 ± 0.030 | Msun |
| Stellar radius | 0.690 ± 0.010 | Rsun |
| Stellar logarithmic surface gravity | 4.620 ± 0.020 | c.g.s. |
| Stellar mean density | 2.600 +0.900 −1.500 ( 3.7 +1.3 −2.1 ) | ρsun g cm-3 |
| Orbital eccentricity | ||
| Orbital semimajor axis | 0.02740 ± 0.00030 | AU |
| Planetary mass | Mjup Mearth | |
| Planetary radius | 0.259 +0.025 −0.010 ( 2.90 +0.28 −0.11 ) | Rjup Rearth |
| Planetary surface gravity | m/s2 log(cgs) | |
| Planetary mean density | ρjup g cm-3 | |
| Planetary equilibrium temperature | 1034 ± 17 | K |
| Reference of detailed study | 2018AJ....156...78L |
K2-255b does not have an entry in the catalogue of orbital obliquity measurements.
Page generated on 2025/08/27 John Southworth (Keele University, UK)