This page summarises the information held within TEPCat for the transiting planetary system GJ 12. Please see here for descriptions of the quantities given below.
| Quantity | Value | Unit |
|---|---|---|
| Reference of discovery paper | 2024ApJ...967L..21K | |
| Date of discovery paper | 2024 / 5 / 24 | y / m / d |
| Data/telescope used for discovery | TESS | |
| Right ascension | 00 15 49.24 | h m s |
| Declination | +13 33 22.3 | d m s |
| Right ascension (decimal) | 3.95517 | degrees |
| Declination (decimal) | 13.55619 | degrees |
| V-band apparent magnitude | 12.60 | mag |
| K-band apparent magnitude | 7.81 | mag |
| Transit duration | 0.050 ( 1.20 ) | day hour |
| Transit depth | 0.1 | % |
| Time of mid-transit | 2459497.1865 ± 0.0026 | HJD or BJD |
| Orbital period | 12.761408 ± 0.000050 | days |
| Reference for orbital ephemeris | 2024ApJ...967L..21K |
| Quantity | Value | Unit |
|---|---|---|
| Stellar effective temperature | 3296 +48 −36 | K |
| Stellar metal abundance ([Fe/H] or [M/H]) | −0.32 ± 0.06 | dex |
| Stellar mass | 0.2414 ± 0.0060 | Msun |
| Stellar radius | 0.2617 +0.0058 −0.0070 | Rsun |
| Stellar logarithmic surface gravity | 5.21 ± 0.07 | c.g.s. |
| Stellar mean density | 13.5 +1.2 −0.9 ( 19.0 + 1.7 − 1.3 ) | ρsun g cm-3 |
| Orbital eccentricity | 0.11 +0.14 −0.08 | |
| Orbital semimajor axis | 0.0668 ± 0.0024 | AU |
| Planetary mass | 0.0049 +0.0025 −0.0024 ( 1.56 +0.79 −0.76 ) | Mjup Mearth |
| Planetary radius | 0.0855 +0.0041 −0.0043 ( 0.958 +0.046 −0.048 ) | Rjup Rearth |
| Planetary surface gravity | m/s2 log(cgs) | |
| Planetary mean density | ρjup g cm-3 | |
| Planetary equilibrium temperature | 315 +6 −5 | K |
| Reference of detailed study | 2024ApJ...967L..21K |
GJ 12 does not have an entry in the catalogue of orbital obliquity measurements.
Page generated on 2025/04/12 John Southworth (Keele University, UK)