This page summarises the information held within TEPCat for the transiting planetary system Qatar-2. Please see here for descriptions of the quantities given below.
| Quantity | Value | Unit |
|---|---|---|
| Reference of discovery paper | 2012ApJ...750...84B | |
| Date of discovery paper | 2011 / 10 / 27 | y / m / d |
| Data/telescope used for discovery | Qatar | |
| Right ascension | 13 50 37.40 | h m s |
| Declination | −06 48 14.4 | d m s |
| Right ascension (decimal) | 207.65583 | degrees |
| Declination (decimal) | -6.80400 | degrees |
| V-band apparent magnitude | 13.49 | mag |
| K-band apparent magnitude | 10.62 | mag |
| Transit duration | 0.07541 ( 1.8098 ) | day hour |
| Transit depth | 3.2 | % |
| Time of mid-transit | 2457218.110131 ± 0.000006 | HJD or BJD |
| Orbital period | 1.337116440 ± 0.000000013 | days |
| Reference for orbital ephemeris | 2024MNRAS.530.2475Y |
| Quantity | Value | Unit |
|---|---|---|
| Stellar effective temperature | 4645 ± 50 | K |
| Stellar metal abundance ([Fe/H] or [M/H]) | −0.02 ± 0.08 | dex |
| Stellar mass | 0.727 ± 0.024 | Msun |
| Stellar radius | 0.7033 ± 0.0080 | Rsun |
| Stellar logarithmic surface gravity | 4.530 ± 0.005 | c.g.s. |
| Stellar mean density | 2.090 ± 0.015 ( 2.949 ± 0.021 ) | ρsun g cm-3 |
| Orbital eccentricity | 0.0 | |
| Orbital semimajor axis | 0.02136 ± 0.00024 | AU |
| Planetary mass | 2.466 ± 0.062 ( 783 ± 19 ) | Mjup Mearth |
| Planetary radius | 1.115 ± 0.013 ( 12.50 ± 0.15 ) | Rjup Rearth |
| Planetary surface gravity | 39.34 ± 0.52 3.595 ± 0.006 | m/s2 log(cgs) |
| Planetary mean density | 1.776 ± 0.034 ( 2.356 ± 0.045 ) | ρjup g cm-3 |
| Planetary equilibrium temperature | 1285 ± 16 | K |
| Reference of detailed study | 2017MNRAS.471..394M |
| Reference | λ (degrees) |
|---|---|
| Mancini et al. (2014) | 4.3 ± 4.5 |
| Mocnik et al. (2017) | 0 ± 8 |
| Dai et al. (2017) | 0 ± 10 |
| Esposito et al. (2017) | 15 ± 20 |
Page generated on 2025/03/17 John Southworth (Keele University, UK)