This page summarises the information held within TEPCat for the transiting system Kepler-1257b. 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 44 18.16 | h m s |
| Declination | +45 37 37.4 | d m s |
| Right ascension (decimal) | 296.07567 | degrees |
| Declination (decimal) | 45.62706 | degrees |
| V-band apparent magnitude | 15.69 | mag |
| K-band apparent magnitude | 13.85 | mag |
| Transit duration | 0.1006 ( 2.414 ) | day hour |
| Transit depth | 0.03 | % |
| Time of mid-transit | 2454964.68823 ± 0.00300 | HJD or BJD |
| Orbital period | 2.6683127 ± 0.0000103 | days |
| Reference for orbital ephemeris | 2016ApJ...822...86M |
| Quantity | Value | Unit |
|---|---|---|
| Stellar effective temperature | 5502 +168 −94 | K |
| Stellar metal abundance ([Fe/H] or [M/H]) | −0.09 +0.15 −0.18 | dex |
| Stellar mass | 0.900 +0.060 −0.040 | Msun |
| Stellar radius | 0.870 +0.100 −0.070 | Rsun |
| Stellar logarithmic surface gravity | 4.520 +0.050 −0.100 | c.g.s. |
| Stellar mean density | ρsun g cm-3 | |
| Orbital eccentricity | ||
| Orbital semimajor axis | AU | |
| Planetary mass | Mjup Mearth | |
| Planetary radius | 0.132 +0.033 −0.012 ( 1.48 +0.37 −0.13 ) | Rjup Rearth |
| Planetary surface gravity | m/s2 log(cgs) | |
| Planetary mean density | ρjup g cm-3 | |
| Planetary equilibrium temperature | 1252 | K |
| Reference of detailed study | 2016ApJ...822...86M |
Kepler-1257b does not have an entry in the catalogue of orbital obliquity measurements.
Page generated on 2025/08/27 John Southworth (Keele University, UK)