This page summarises the information held within TEPCat for the transiting planetary system K2-280. Please see here for descriptions of the quantities given below.
| Quantity | Value | Unit |
|---|---|---|
| Reference of discovery paper | 2018AJ....156..277L | |
| Date of discovery paper | 2018 / 10 / 10 | y / m / d |
| Data/telescope used for discovery | K2 | |
| Right ascension | 19 26 22.88 | h m s |
| Declination | −22 14 51.6 | d m s |
| Right ascension (decimal) | 291.59533 | degrees |
| Declination (decimal) | -22.24767 | degrees |
| V-band apparent magnitude | 12.54 | mag |
| K-band apparent magnitude | 10.77 | mag |
| Transit duration | 0.3445 ( 8.268 ) | day hour |
| Transit depth | 0.32 | % |
| Time of mid-transit | 2457307.58114 ± 0.00056 | HJD or BJD |
| Orbital period | 19.89526 ± 0.00028 | days |
| Reference for orbital ephemeris | 2020MNRAS.497.4423N |
| Quantity | Value | Unit |
|---|---|---|
| Stellar effective temperature | 5500 ± 100 | K |
| Stellar metal abundance ([Fe/H] or [M/H]) | +0.33 ± 0.08 | dex |
| Stellar mass | 1.03 ± 0.03 | Msun |
| Stellar radius | 1.28 ± 0.07 | Rsun |
| Stellar logarithmic surface gravity | 4.31 ± 0.05 | c.g.s. |
| Stellar mean density | 0.57 +0.11 −0.09 ( 0.80 +0.16 −0.13 ) | ρsun g cm-3 |
| Orbital eccentricity | 0.35 +0.05 −0.04 | |
| Orbital semimajor axis | 0.1461 +0.0099 −0.0097 | AU |
| Planetary mass | 0.117 ± 0.018 ( 37.2 ± 5.7 ) | Mjup Mearth |
| Planetary radius | 0.669 ± 0.039 ( 7.50 ± 0.44 ) | Rjup Rearth |
| Planetary surface gravity | 6.5 +1.1 −1.0 2.81 +0.07 −0.07 | m/s2 log(cgs) |
| Planetary mean density | 0.36 +0.10 −0.08 ( 0.48 +0.13 −0.11 ) | ρjup g cm-3 |
| Planetary equilibrium temperature | 787 ± 17 | K |
| Reference of detailed study | 2020MNRAS.497.4423N |
K2-280 does not have an entry in the catalogue of orbital obliquity measurements.
Page generated on 2025/02/12 John Southworth (Keele University, UK)