This page summarises the information held within TEPCat for the transiting system K2-251b. 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 42 45.41 | h m s |
| Declination | −08 32 09.3 | d m s |
| Right ascension (decimal) | 190.68921 | degrees |
| Declination (decimal) | -8.53592 | degrees |
| V-band apparent magnitude | 14.47 | mag |
| K-band apparent magnitude | 11.52 | mag |
| Transit duration | 0.0972 ( 2.333 ) | day hour |
| Transit depth | 0.19 | % |
| Time of mid-transit | 2457589.07820 ± 0.01280 | HJD or BJD |
| Orbital period | 9.3007500 ± 0.0033200 | days |
| Reference for orbital ephemeris | 2018AJ....156...78L |
| Quantity | Value | Unit |
|---|---|---|
| Stellar effective temperature | 3717 +85 −50 | K |
| Stellar metal abundance ([Fe/H] or [M/H]) | −0.04 +0.18 −0.19 | dex |
| Stellar mass | 0.520 ± 0.010 | Msun |
| Stellar radius | 0.490 ± 0.010 | Rsun |
| Stellar logarithmic surface gravity | 4.760 ± 0.010 | c.g.s. |
| Stellar mean density | 1.400 +1.200 −0.900 ( 2.0 +1.7 −1.3 ) | ρsun g cm-3 |
| Orbital eccentricity | ||
| Orbital semimajor axis | 0.06940 ± 0.00050 | AU |
| Planetary mass | Mjup Mearth | |
| Planetary radius | 0.210 +0.023 −0.019 ( 2.35 +0.26 −0.21 ) | Rjup Rearth |
| Planetary surface gravity | m/s2 log(cgs) | |
| Planetary mean density | ρjup g cm-3 | |
| Planetary equilibrium temperature | 437 ± 9 | K |
| Reference of detailed study | 2018AJ....156...78L |
K2-251b does not have an entry in the catalogue of orbital obliquity measurements.
Page generated on 2025/08/27 John Southworth (Keele University, UK)