This page summarises the information held within TEPCat for the transiting planetary system K2-55. Please see here for descriptions of the quantities given below.
| Quantity | Value | Unit |
|---|---|---|
| Reference of discovery paper | 2016ApJS..226....7C | |
| Date of discovery paper | 2016 / 7 / 19 | y / m / d |
| Data/telescope used for discovery | K2 | |
| Right ascension | 22 15 00.46 | h m s |
| Declination | −17 15 02.5 | d m s |
| Right ascension (decimal) | 333.75192 | degrees |
| Declination (decimal) | -17.25069 | degrees |
| V-band apparent magnitude | 13.55 | mag |
| K-band apparent magnitude | 10.47 | mag |
| Transit duration | 0.10 ( 2.4 ) | day hour |
| Transit depth | 0.40 | % |
| Time of mid-transit | 2456983.4229 ± 0.0004 | HJD or BJD |
| Orbital period | 2.849275 ± 0.000027 | days |
| Reference for orbital ephemeris | 2018AJ....156...70D |
| Quantity | Value | Unit |
|---|---|---|
| Stellar effective temperature | 4300 +107 −100 | K |
| Stellar metal abundance ([Fe/H] or [M/H]) | +0.376 ± 0.095 | dex |
| Stellar mass | 0.688 ± 0.069 | Msun |
| Stellar radius | 0.715 +0.043 −0.040 | Rsun |
| Stellar logarithmic surface gravity | 4.566 ± 0.036 | c.g.s. |
| Stellar mean density | ρsun g cm-3 | |
| Orbital eccentricity | 0.124 +0.054 −0.055 | |
| Orbital semimajor axis | 0.0347 ± 0.001 | AU |
| Planetary mass | 0.138 ± 0.017 ( 43.9 ± 5.4 ) | Mjup Mearth |
| Planetary radius | 0.395 ± 0.026 ( 4.43 ± 0.29 ) | Rjup Rearth |
| Planetary surface gravity | m/s2 log(cgs) | |
| Planetary mean density | 2.1 ± 0.5 ( 2.79 ± 0.66 ) | ρjup g cm-3 |
| Planetary equilibrium temperature | 900 | K |
| Reference of detailed study | 2018AJ....156...70D |
K2-55 does not have an entry in the catalogue of orbital obliquity measurements.
Page generated on 2024/09/04 John Southworth (Keele University, UK)