This page summarises the information held within TEPCat for the transiting planetary system Kepler-421. Please see here for descriptions of the quantities given below.
| Quantity | Value | Unit |
|---|---|---|
| Reference of discovery paper | 2014ApJ...795...25K | |
| Date of discovery paper | 2014 / 7 / 21 | y / m / d |
| Data/telescope used for discovery | Kepler | |
| Right ascension | 18 53 01.63 | h m s |
| Declination | +45 05 16.0 | d m s |
| Right ascension (decimal) | 283.25679 | degrees |
| Declination (decimal) | 45.08778 | degrees |
| V-band apparent magnitude | 13.56 | mag |
| K-band apparent magnitude | 11.54 | mag |
| Transit duration | 0.658 ( 15.79 ) | day hour |
| Transit depth | 0.3 | % |
| Time of mid-transit | 2455325.7674 ± 0.0012 | HJD or BJD |
| Orbital period | 704.1984 ± 0.0016 | days |
| Reference for orbital ephemeris | 2014ApJ...795...25K |
| Quantity | Value | Unit |
|---|---|---|
| Stellar effective temperature | 5308 ± 50 | K |
| Stellar metal abundance ([Fe/H] or [M/H]) | −0.25 ± 0.08 | dex |
| Stellar mass | 0.794 ± 0.030 | Msun |
| Stellar radius | 0.757 ± 0.029 | Rsun |
| Stellar logarithmic surface gravity | 4.61 ± 0.10 | c.g.s. |
| Stellar mean density | 1.12 +0.16 −0.26 ( 1.58 +0.23 −0.37 ) | ρsun g cm-3 |
| Orbital eccentricity | 0.041 +0.095 −0.034 | |
| Orbital semimajor axis | 1.219 +0.089 −0.106 | AU |
| Planetary mass | 0.0 +0.428 −0.0 ( 0 +136 −0 ) | Mjup Mearth |
| Planetary radius | 0.371 +0.017 −0.014 ( 4.16 +0.19 −0.16 ) | Rjup Rearth |
| Planetary surface gravity | m/s2 log(cgs) | |
| Planetary mean density | ρjup g cm-3 | |
| Planetary equilibrium temperature | 185 +9 −5 | K |
| Reference of detailed study | 2024ApJS..271...16D |
Kepler-421 does not have an entry in the catalogue of orbital obliquity measurements.
Page generated on 2025/03/24 John Southworth (Keele University, UK)