This page summarises the information held within TEPCat for the transiting brown dwarf system GPX-1. Please see here for descriptions of the quantities given below.
| Quantity | Value | Unit |
|---|---|---|
| Reference of discovery paper | 2021MNRAS.505.4956B | |
| Date of discovery paper | 2020 / 9 / 28 | y / m / d |
| Data/telescope used for discovery | GPX | |
| Right ascension | 02 33 28.61 | h m s |
| Declination | +56 01 32.6 | d m s |
| Right ascension (decimal) | 38.36921 | degrees |
| Declination (decimal) | 56.02572 | degrees |
| V-band apparent magnitude | 12.27 | mag |
| K-band apparent magnitude | 11.18 | mag |
| Transit duration | 0.087 ( 2.09 ) | day hour |
| Transit depth | 0.90 | % |
| Time of mid-transit | 2458770.23823 ± 0.00040 | HJD or BJD |
| Orbital period | 1.744579 ± 0.000008 | days |
| Reference for orbital ephemeris | 2021MNRAS.505.4956B |
| Quantity | Value | Unit |
|---|---|---|
| Stellar effective temperature | 7000 ± 200 | K |
| Stellar metal abundance ([Fe/H] or [M/H]) | +0.35 ± 0.1 | dex |
| Stellar mass | 1.68 ± 0.10 | Msun |
| Stellar radius | 1.56 ± 0.10 | Rsun |
| Stellar logarithmic surface gravity | 4.27 ± 0.05 | c.g.s. |
| Stellar mean density | 0.44 ± 0.10 ( 0.62 ± 0.14 ) | ρsun g cm-3 |
| Orbital eccentricity | 0.0 | |
| Orbital semimajor axis | 0.0338 ± 0.0003 | AU |
| Planetary mass | 19.7 ± 1.6 ( 62624 ± 5086 ) | Mjup Mearth |
| Planetary radius | 1.47 ± 0.10 ( 16.5 ± 1.1 ) | Rjup Rearth |
| Planetary surface gravity | 234 +35 −30 4.37 +0.06 −0.06 | m/s2 log(cgs) |
| Planetary mean density | 6.2 +1.3 −1.0 ( 8.2 +1.7 −1.3 ) | ρjup g cm-3 |
| Planetary equilibrium temperature | 2300 ± 48 | K |
| Reference of detailed study | 2021MNRAS.505.4956B |
| Reference | λ (degrees) |
|---|---|
| Giacalone et al. (2024) | 6.9 ± 10.0 |
Page generated on 2025/03/17 John Southworth (Keele University, UK)