This page summarises the information held within TEPCat for the transiting system K2-9b. Please see here for descriptions of the quantities given below.
| Quantity | Value | Unit |
|---|---|---|
| Reference of discovery paper | 2015ApJ...809...25M | |
| Date of discovery paper | 2015 / 8 / 13 | y / m / d |
| Data/telescope used for discovery | K2 | |
| Right ascension | 11 45 03.47 | h m s |
| Declination | +00 00 19.1 | d m s |
| Right ascension (decimal) | 176.26446 | degrees |
| Declination (decimal) | 0.00531 | degrees |
| V-band apparent magnitude | 14.54 | mag |
| K-band apparent magnitude | 11.49 | mag |
| Transit duration | 0.12 ( 2.9 ) | day hour |
| Transit depth | 0.04 | % |
| Time of mid-transit | 2456822.6723 ± 0.0030 | HJD or BJD |
| Orbital period | 18.44883 ± 0.00137 | days |
| Reference for orbital ephemeris | 2015ApJ...809...25M |
| Quantity | Value | Unit |
|---|---|---|
| Stellar effective temperature | 3468 +20 −19 | K |
| Stellar metal abundance ([Fe/H] or [M/H]) | −0.46 +0.12 −0.10 | dex |
| Stellar mass | 0.24 +0.05 −0.03 | Msun |
| Stellar radius | 0.25 +0.04 −0.03 | Rsun |
| Stellar logarithmic surface gravity | c.g.s. | |
| Stellar mean density | ρsun g cm-3 | |
| Orbital eccentricity | 0.0 | |
| Orbital semimajor axis | 0.0848 ± 0.0050 | AU |
| Planetary mass | Mjup Mearth | |
| Planetary radius | 0.143 ± 0.037 ( 1.60 ± 0.41 ) | Rjup Rearth |
| Planetary surface gravity | m/s2 log(cgs) | |
| Planetary mean density | ρjup g cm-3 | |
| Planetary equilibrium temperature | 284 ± 14 | K |
| Reference of detailed study | 2015ApJ...809...25M |
K2-9b does not have an entry in the catalogue of orbital obliquity measurements.
Page generated on 2025/08/27 John Southworth (Keele University, UK)