This page summarises the information held within TEPCat for the transiting planetary system GJ 436. Please see here for descriptions of the quantities given below.
| Quantity | Value | Unit |
|---|---|---|
| Reference of discovery paper | 2007A+A...472L..13G | |
| Date of discovery paper | 2007 / 5 / 6 | y / m / d |
| Data/telescope used for discovery | other | |
| Right ascension | 11 42 11.09 | h m s |
| Declination | +26 42 23.6 | d m s |
| Right ascension (decimal) | 175.54621 | degrees |
| Declination (decimal) | 26.70656 | degrees |
| V-band apparent magnitude | 10.68 | mag |
| K-band apparent magnitude | 6.07 | mag |
| Transit duration | 0.04189 ( 1.0054 ) | day hour |
| Transit depth | 0.6 | % |
| Time of mid-transit | 2455475.82450 ± 0.00003 | HJD or BJD |
| Orbital period | 2.64389759 ± 0.00000007 | days |
| Reference for orbital ephemeris | 2022MNRAS.514...77M |
| Quantity | Value | Unit |
|---|---|---|
| Stellar effective temperature | 3586 ± 36 | K |
| Stellar metal abundance ([Fe/H] or [M/H]) | +0.10 ± 0.08 | dex |
| Stellar mass | 0.441 ± 0.009 | Msun |
| Stellar radius | 0.425 ± 0.006 | Rsun |
| Stellar logarithmic surface gravity | 4.841 ± 0.009 | c.g.s. |
| Stellar mean density | 5.37 +0.30 −0.27 ( 7.58 +0.42 −0.38 ) | ρsun g cm-3 |
| Orbital eccentricity | 0.152 ± 0.009 | |
| Orbital semimajor axis | 0.0286 ± 0.0002 | AU |
| Planetary mass | 0.0799 +0.0066 −0.0063 ( 25.4 +2.1 −2.0 ) | Mjup Mearth |
| Planetary radius | 0.3417 ± 0.0053 ( 3.830 ± 0.059 ) | Rjup Rearth |
| Planetary surface gravity | 14.11 ± 0.46 3.15 ± 0.01 | m/s2 log(cgs) |
| Planetary mean density | 1.58 ± 0.08 ( 2.10 ± 0.11 ) | ρjup g cm-3 |
| Planetary equilibrium temperature | 690 ± 10 | K |
| Reference of detailed study | 2026A+A...710A..82H |
| Reference | λ (degrees) |
|---|---|
| Bourrier et al. (2018) | 72 + 33 - 24 |
| Bourrier et al. (2022) | 114 + 23 - 17 |
Page generated on 2026/08/12 John Southworth (Keele University, UK)