This page summarises the information held within TEPCat for the transiting planetary system Kepler-18b. Please see here for descriptions of the quantities given below.
| Quantity | Value | Unit |
|---|---|---|
| Reference of discovery paper | 2011ApJS..197....7C | |
| Date of discovery paper | 2011 / 10 / 5 | y / m / d |
| Data/telescope used for discovery | Kepler | |
| Right ascension | 19 52 19.06 | h m s |
| Declination | +44 44 46.7 | d m s |
| Right ascension (decimal) | 298.07942 | degrees |
| Declination (decimal) | 44.74631 | degrees |
| V-band apparent magnitude | 13.75 | mag |
| K-band apparent magnitude | 11.76 | mag |
| Transit duration | 0.0865 ( 2.076 ) | day hour |
| Transit depth | 0.03 | % |
| Time of mid-transit | 2454966.5068 ± 0.0021 | HJD or BJD |
| Orbital period | 3.504725 ± 0.000004 | days |
| Reference for orbital ephemeris | 2011ApJS..197....7C |
| Quantity | Value | Unit |
|---|---|---|
| Stellar effective temperature | 5383 ± 44 | K |
| Stellar metal abundance ([Fe/H] or [M/H]) | +0.20 ± 0.04 | dex |
| Stellar mass | 0.972 ± 0.042 | Msun |
| Stellar radius | 1.108 ± 0.051 | Rsun |
| Stellar logarithmic surface gravity | 4.31 ± 0.12 | c.g.s. |
| Stellar mean density | 0.72 ± 0.09 ( 1.02 ± 0.13 ) | ρsun g cm-3 |
| Orbital eccentricity | 0.0 | |
| Orbital semimajor axis | 0.0447 ± 0.0006 | AU |
| Planetary mass | 0.022 ± 0.011 ( 7.0 ± 3.5 ) | Mjup Mearth |
| Planetary radius | 0.178 ± 0.009 ( 2.00 ± 0.10 ) | Rjup Rearth |
| Planetary surface gravity | m/s2 log(cgs) | |
| Planetary mean density | 3.7 ± 1.8 ( 4.9 ± 2.4 ) | ρjup g cm-3 |
| Planetary equilibrium temperature | K | |
| Reference of detailed study | 2011ApJS..197....7C |
Kepler-18b does not have an entry in the catalogue of orbital obliquity measurements.
Page generated on 2025/01/01 John Southworth (Keele University, UK)