This page summarises the information held within TEPCat for the transiting system Kepler-557b. Please see here for descriptions of the quantities given below.
| Quantity | Value | Unit |
|---|---|---|
| Reference of discovery paper | 2016ApJ...822...86M | |
| Date of discovery paper | 2016 / 5 / 10 | y / m / d |
| Data/telescope used for discovery | Kepler | |
| Right ascension | 19 34 50.03 | h m s |
| Declination | +41 36 54.4 | d m s |
| Right ascension (decimal) | 293.70846 | degrees |
| Declination (decimal) | 41.61511 | degrees |
| V-band apparent magnitude | 14.80 | mag |
| K-band apparent magnitude | 13.15 | mag |
| Transit duration | 0.2152 ( 5.165 ) | day hour |
| Transit depth | 0.05 | % |
| Time of mid-transit | 2455002.94286 ± 0.00100 | HJD or BJD |
| Orbital period | 3.7059917 ± 0.0000048 | days |
| Reference for orbital ephemeris | 2016ApJ...822...86M |
| Quantity | Value | Unit |
|---|---|---|
| Stellar effective temperature | 6068 +152 −199 | K |
| Stellar metal abundance ([Fe/H] or [M/H]) | 0.02 +0.13 −0.16 | dex |
| Stellar mass | 1.110 +0.120 −0.090 | Msun |
| Stellar radius | 1.160 +0.350 −0.160 | Rsun |
| Stellar logarithmic surface gravity | 4.350 +0.100 −0.190 | c.g.s. |
| Stellar mean density | ρsun g cm-3 | |
| Orbital eccentricity | ||
| Orbital semimajor axis | AU | |
| Planetary mass | Mjup Mearth | |
| Planetary radius | 0.217 +0.068 −0.029 ( 2.43 +0.76 −0.33 ) | Rjup Rearth |
| Planetary surface gravity | m/s2 log(cgs) | |
| Planetary mean density | ρjup g cm-3 | |
| Planetary equilibrium temperature | 1281 | K |
| Reference of detailed study | 2016ApJ...822...86M |
Kepler-557b does not have an entry in the catalogue of orbital obliquity measurements.
Page generated on 2025/08/27 John Southworth (Keele University, UK)