This page summarises the information held within TEPCat for the transiting planetary system K2-39. Please see here for descriptions of the quantities given below.
| Quantity | Value | Unit |
|---|---|---|
| Reference of discovery paper | 2016AJ....152..143V | |
| Date of discovery paper | 2016 / 5 / 31 | y / m / d |
| Data/telescope used for discovery | K2 | |
| Right ascension | 22 33 28.41 | h m s |
| Declination | −09 01 22.0 | d m s |
| Right ascension (decimal) | 338.36838 | degrees |
| Declination (decimal) | -9.02278 | degrees |
| V-band apparent magnitude | 10.83 | mag |
| K-band apparent magnitude | 8.52 | mag |
| Transit duration | 0.38 ( 9.1 ) | day hour |
| Transit depth | 0.04 | % |
| Time of mid-transit | 2456980.8236 ± 0.0039 | HJD or BJD |
| Orbital period | 4.60543 ± 0.00046 | days |
| Reference for orbital ephemeris | 2016AJ....152..143V |
| Quantity | Value | Unit |
|---|---|---|
| Stellar effective temperature | 4912 ± 60 | K |
| Stellar metal abundance ([Fe/H] or [M/H]) | +0.43 ± 0.04 | dex |
| Stellar mass | 1.192 +0.085 −0.070 | Msun |
| Stellar radius | 2.93 ± 0.21 | Rsun |
| Stellar logarithmic surface gravity | 3.58 ± 0.05 | c.g.s. |
| Stellar mean density | ρsun g cm-3 | |
| Orbital eccentricity | 0.152 +0.084 −0.066 | |
| Orbital semimajor axis | 0.0574 ± 0.0012 | AU |
| Planetary mass | 0.125 ± 0.014 ( 39.7 ± 4.5 ) | Mjup Mearth |
| Planetary radius | 0.509 ± 0.056 ( 5.71 ± 0.63 ) | Rjup Rearth |
| Planetary surface gravity | m/s2 log(cgs) | |
| Planetary mean density | 0.88 +0.35 −0.24 ( 1.17 +0.46 −0.32 ) | ρjup g cm-3 |
| Planetary equilibrium temperature | 1670 ± 54 | K |
| Reference of detailed study | 2017AJ....153..142P |
K2-39 does not have an entry in the catalogue of orbital obliquity measurements.
Page generated on 2026/01/29 John Southworth (Keele University, UK)