This page summarises the information held within TEPCat for the transiting planetary system K2-2. Please see here for descriptions of the quantities given below.
| Quantity | Value | Unit |
|---|---|---|
| Reference of discovery paper | 2015ApJ...800...59V | |
| Date of discovery paper | 2014 / 12 / 19 | y / m / d |
| Data/telescope used for discovery | K2 | |
| Right ascension | 23 35 49.28 | h m s |
| Declination | +00 26 43.9 | d m s |
| Right ascension (decimal) | 353.95533 | degrees |
| Declination (decimal) | 0.44553 | degrees |
| V-band apparent magnitude | 10.19 | mag |
| K-band apparent magnitude | 8.03 | mag |
| Transit duration | 0.094 ( 2.26 ) | day hour |
| Transit depth | 0.1 | % |
| Time of mid-transit | 2456907.89 ± 0.03 | HJD or BJD |
| Orbital period | 9.1205 ± 0.0005 | days |
| Reference for orbital ephemeris | 2015ApJ...800...59V |
| Quantity | Value | Unit |
|---|---|---|
| Stellar effective temperature | 5089 ± 50 | K |
| Stellar metal abundance ([Fe/H] or [M/H]) | −0.16 ± 0.08 | dex |
| Stellar mass | 0.775 ± 0.027 | Msun |
| Stellar radius | 0.716 ± 0.024 | Rsun |
| Stellar logarithmic surface gravity | 4.590 ± 0.026 | c.g.s. |
| Stellar mean density | 2.11 ± 0.23 ( 2.98 ± 0.32 ) | ρsun g cm-3 |
| Orbital eccentricity | 0.205 ± 0.072 | |
| Orbital semimajor axis | AU | |
| Planetary mass | 0.037 ± 0.004 ( 11.8 ± 1.3 ) | Mjup Mearth |
| Planetary radius | 0.226 ± 0.016 ( 2.53 ± 0.18 ) | Rjup Rearth |
| Planetary surface gravity | 18.2 +3.7 −3.1 3.26 +0.08 −0.08 | m/s2 log(cgs) |
| Planetary mean density | 3.14 ± 0.81 ( 4.2 ± 1.1 ) | ρjup g cm-3 |
| Planetary equilibrium temperature | 690 ± 14 | K |
| Reference of detailed study | 2015ApJ...800...59V |
K2-2 does not have an entry in the catalogue of orbital obliquity measurements.
Page generated on 2023/09/01 John Southworth (Keele University, UK)