This page summarises the information held within TEPCat for the transiting planetary system Qatar-4. Please see here for descriptions of the quantities given below.
| Quantity | Value | Unit |
|---|---|---|
| Reference of discovery paper | 2017AJ....153..200A | |
| Date of discovery paper | 2017 / 4 / 10 | y / m / d |
| Data/telescope used for discovery | Qatar | |
| Right ascension | 00 19 26.22 | h m s |
| Declination | +44 01 39.4 | d m s |
| Right ascension (decimal) | 4.85925 | degrees |
| Declination (decimal) | 44.02761 | degrees |
| V-band apparent magnitude | 13.60 | mag |
| K-band apparent magnitude | 11.52 | mag |
| Transit duration | 0.0891 ( 2.138 ) | day hour |
| Transit depth | 2.1 | % |
| Time of mid-transit | 2458293.1227 ± 0.00015 | HJD or BJD |
| Orbital period | 1.805369 ± 0.0000007 | days |
| Reference for orbital ephemeris | 2022ExA....53..547K |
| Quantity | Value | Unit |
|---|---|---|
| Stellar effective temperature | 5218 ± 50 | K |
| Stellar metal abundance ([Fe/H] or [M/H]) | +0.10 ± 0.08 | dex |
| Stellar mass | 0.896 ± 0.048 | Msun |
| Stellar radius | 0.849 ± 0.063 | Rsun |
| Stellar logarithmic surface gravity | 4.533 ± 0.058 | c.g.s. |
| Stellar mean density | 1.467 ± 0.027 ( 2.070 ± 0.038 ) | ρsun g cm-3 |
| Orbital eccentricity | 0.0 | |
| Orbital semimajor axis | 0.02803 ± 0.00048 | AU |
| Planetary mass | 6.10 ± 0.54 ( 19391 ± 1717 ) | Mjup Mearth |
| Planetary radius | 1.135 ± 0.11 ( 12.7 ± 1.2 ) | Rjup Rearth |
| Planetary surface gravity | 117 +23 −19 4.07 +0.08 −0.08 | m/s2 log(cgs) |
| Planetary mean density | 3.8 ± 0.8 ( 5.0 ± 1.1 ) | ρjup g cm-3 |
| Planetary equilibrium temperature | 1385 ± 48 | K |
| Reference of detailed study | 2017AJ....153..200A |
Qatar-4 does not have an entry in the catalogue of orbital obliquity measurements.
Page generated on 2025/02/12 John Southworth (Keele University, UK)