This page summarises the information held within TEPCat for the transiting planetary system K2-291. Please see here for descriptions of the quantities given below.
| Quantity | Value | Unit |
|---|---|---|
| Reference of discovery paper | 2019AJ....157..116K | |
| Date of discovery paper | 2019 / 1 / 16 | y / m / d |
| Data/telescope used for discovery | K2 | |
| Right ascension | 05 05 46.99 | h m s |
| Declination | +21 32 55.0 | d m s |
| Right ascension (decimal) | 76.44579 | degrees |
| Declination (decimal) | 21.54861 | degrees |
| V-band apparent magnitude | 10.01 | mag |
| K-band apparent magnitude | 8.35 | mag |
| Transit duration | 0.0716 ( 1.718 ) | day hour |
| Transit depth | 0.03 | % |
| Time of mid-transit | 2457830.0616 ± 0.0010 | HJD or BJD |
| Orbital period | 2.225177 ± 0.000067 | days |
| Reference for orbital ephemeris | 2019AJ....157..116K |
| Quantity | Value | Unit |
|---|---|---|
| Stellar effective temperature | 5520 ± 60 | K |
| Stellar metal abundance ([Fe/H] or [M/H]) | +0.08 ± 0.04 | dex |
| Stellar mass | 0.934 ± 0.038 | Msun |
| Stellar radius | 0.899 +0.035 −0.033 | Rsun |
| Stellar logarithmic surface gravity | 4.50 ± 0.05 | c.g.s. |
| Stellar mean density | ρsun g cm-3 | |
| Orbital eccentricity | 0.0 | |
| Orbital semimajor axis | 0.03261 ± 0.00044 | AU |
| Planetary mass | 0.0204 ± 0.0036 ( 6.5 ± 1.1 ) | Mjup Mearth |
| Planetary radius | 0.1418 +0.0085 −0.0064 ( 1.589 +0.095 −0.072 ) | Rjup Rearth |
| Planetary surface gravity | m/s2 log(cgs) | |
| Planetary mean density | 6.7 +1.9 −1.5 ( 8.9 +2.5 −2.0 ) | ρjup g cm-3 |
| Planetary equilibrium temperature | K | |
| Reference of detailed study | 2019AJ....157..116K |
K2-291 does not have an entry in the catalogue of orbital obliquity measurements.
Page generated on 2025/01/01 John Southworth (Keele University, UK)