This page summarises the information held within TEPCat for the transiting planetary system GJ 523. Please see here for descriptions of the quantities given below.
| Quantity | Value | Unit |
|---|---|---|
| Reference of discovery paper | arXiv:2603.24682 | |
| Date of discovery paper | 2026 / 3 / 27 | y / m / d |
| Data/telescope used for discovery | TESS | |
| Right ascension | 13 43 23.08 | h m s |
| Declination | +39 14 56.9 | d m s |
| Right ascension (decimal) | 205.84617 | degrees |
| Declination (decimal) | 39.24914 | degrees |
| V-band apparent magnitude | 9.24 | mag |
| K-band apparent magnitude | 6.53 | mag |
| Transit duration | 0.119 ( 2.86 ) | day hour |
| Transit depth | 0.1 | % |
| Time of mid-transit | 2460397.0239 ± 0.0011 | HJD or BJD |
| Orbital period | 17.745740 ± 0.000045 | days |
| Reference for orbital ephemeris | arXiv:2603.24682 |
| Quantity | Value | Unit |
|---|---|---|
| Stellar effective temperature | 4660 ± 50 | K |
| Stellar metal abundance ([Fe/H] or [M/H]) | −0.193 ± 0.080 | dex |
| Stellar mass | 0.781 ± 0.029 | Msun |
| Stellar radius | 0.702 ± 0.030 | Rsun |
| Stellar logarithmic surface gravity | 4.62 ± 0.10 | c.g.s. |
| Stellar mean density | 2.26 +0.32 −0.28 ( 3.19 +0.45 −0.40 ) | ρsun g cm-3 |
| Orbital eccentricity | 0.143 +0.069 −0.063 | |
| Orbital semimajor axis | 0.1226 ± 0.0015 | AU |
| Planetary mass | 0.074 ± 0.010 ( 23.5 ± 3.2 ) | Mjup Mearth |
| Planetary radius | 0.227 ± 0.013 ( 2.54 ± 0.15 ) | Rjup Rearth |
| Planetary surface gravity | m/s2 log(cgs) | |
| Planetary mean density | 5.9 +1.5 −1.2 ( 7.8 +2.0 −1.6 ) | ρjup g cm-3 |
| Planetary equilibrium temperature | 538 ± 13 | K |
| Reference of detailed study | arXiv:2603.24682 |
| Reference | λ (degrees) |
|---|---|
| Kroft et al. (2026) | −999 ± -999 |
Page generated on 2026/04/13 John Southworth (Keele University, UK)