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 | 0.101 ( 2.42 ) | day hour |
| Transit depth | 0.11 | % |
| Time of mid-transit | 2458072.29291 ± 0.00062 | HJD or BJD |
| Orbital period | 9.1004157 ± 0.0000043 | days |
| Reference for orbital ephemeris | 2024AJ....168..161T |
| Quantity | Value | Unit |
|---|---|---|
| Stellar effective temperature | 5048 +79 −78 | K |
| Stellar metal abundance ([Fe/H] or [M/H]) | +0.000 +0.045 −0.039 | dex |
| Stellar mass | 0.800 +0.033 −0.030 | Msun |
| Stellar radius | 0.758 +0.024 −0.022 | Rsun |
| Stellar logarithmic surface gravity | 4.582 +0.030 −0.031 | c.g.s. |
| Stellar mean density | 1.84 +0.18 −0.17 ( 2.60 +0.25 −0.24 ) | ρsun g cm-3 |
| Orbital eccentricity | 0.215 +0.056 −0.094 | |
| Orbital semimajor axis | 0.0792 +0.0011 −0.0010 | AU |
| Planetary mass | 0.0305 ± 0.0038 ( 9.7 ± 1.2 ) | Mjup Mearth |
| Planetary radius | 0.220 +0.009 −0.008 ( 2.466 +0.101 −0.090 ) | Rjup Rearth |
| Planetary surface gravity | 15.6 +2.3 −2.2 3.19 +0.06 −0.07 | m/s2 log(cgs) |
| Planetary mean density | 2.66 +0.47 −0.43 ( 3.53 +0.62 −0.57 ) | ρjup g cm-3 |
| Planetary equilibrium temperature | 753 ± 7 | K |
| Reference of detailed study | 2024AJ....168..161T |
K2-2 does not have an entry in the catalogue of orbital obliquity measurements.
Page generated on 2025/03/24 John Southworth (Keele University, UK)