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 | 3416 ± 54 | K |
| Stellar metal abundance ([Fe/H] or [M/H]) | −0.03 ± 0.20 | dex |
| Stellar mass | 0.507 +0.071 −0.062 | Msun |
| Stellar radius | 0.455 ± 0.018 | Rsun |
| Stellar logarithmic surface gravity | 4.83 ± 0.03 | c.g.s. |
| Stellar mean density | 5.37 +0.30 −0.27 ( 7.58 +0.42 −0.38 ) | ρsun g cm-3 |
| Orbital eccentricity | 0.1616 +0.0041 −0.0032 | |
| Orbital semimajor axis | 0.0308 +0.0013 −0.0012 | AU |
| Planetary mass | 0.0799 +0.0066 −0.0063 ( 25.4 +2.1 −2.0 ) | Mjup Mearth |
| Planetary radius | 0.366 ± 0.014 ( 4.10 ± 0.16 ) | Rjup Rearth |
| Planetary surface gravity | 13 ± 1 3.11 ± 0.03 | m/s2 log(cgs) |
| Planetary mean density | 1.55 +0.12 −0.10 ( 2.06 +0.16 −0.13 ) | ρjup g cm-3 |
| Planetary equilibrium temperature | 669 ± 22 | K |
| Reference of detailed study | 2014A+A...572A..73L |
| Reference | λ (degrees) |
|---|---|
| Bourrier et al. (2018) | 72 + 33 - 24 |
| Bourrier et al. (2022) | 114 + 23 - 17 |
Page generated on 2025/03/12 John Southworth (Keele University, UK)