This page summarises the information held within TEPCat for the transiting system K2-4b. Please see here for descriptions of the quantities given below.
| Quantity | Value | Unit |
|---|---|---|
| Reference of discovery paper | 2015ApJ...809...25M | |
| Date of discovery paper | 2015 / 3 / 27 | y / m / d |
| Data/telescope used for discovery | K2 | |
| Right ascension | 11 38 58.95 | h m s |
| Declination | −03 54 20.1 | d m s |
| Right ascension (decimal) | 174.74562 | degrees |
| Declination (decimal) | -3.90558 | degrees |
| V-band apparent magnitude | 14.91 | mag |
| K-band apparent magnitude | 11.57 | mag |
| Transit duration | 0.0 ( 0. ) | day hour |
| Transit depth | 0.12 | % |
| Time of mid-transit | 2456815.51980 ± 0.00850 | HJD or BJD |
| Orbital period | 10.00411 ± 0.00163 | days |
| Reference for orbital ephemeris | 2015ApJ...809...25M |
| Quantity | Value | Unit |
|---|---|---|
| Stellar effective temperature | 4197 +45 −43 | K |
| Stellar metal abundance ([Fe/H] or [M/H]) | −0.12 +0.10 −0.12 | dex |
| Stellar mass | 0.63 ± 0.03 | Msun |
| Stellar radius | 0.60 ± 0.02 | Rsun |
| Stellar logarithmic surface gravity | c.g.s. | |
| Stellar mean density | ρsun g cm-3 | |
| Orbital eccentricity | 0.0 | |
| Orbital semimajor axis | 0.0777 ± 0.0012 | AU |
| Planetary mass | Mjup Mearth | |
| Planetary radius | 0.211 ± 0.035 ( 2.37 ± 0.39 ) | Rjup Rearth |
| Planetary surface gravity | m/s2 log(cgs) | |
| Planetary mean density | ρjup g cm-3 | |
| Planetary equilibrium temperature | 563 ± 11 | K |
| Reference of detailed study | 2015ApJ...809...25M |
K2-4b does not have an entry in the catalogue of orbital obliquity measurements.
Page generated on 2025/08/27 John Southworth (Keele University, UK)