This page summarises the information held within TEPCat for the transiting planetary system NGTS-18. Please see here for descriptions of the quantities given below.
| Quantity | Value | Unit |
|---|---|---|
| Reference of discovery paper | 2021MNRAS.504.6018T | |
| Date of discovery paper | 2021 / 3 / 19 | y / m / d |
| Data/telescope used for discovery | NGTS | |
| Right ascension | 12 02 11.09 | h m s |
| Declination | −35 32 55.0 | d m s |
| Right ascension (decimal) | 180.54621 | degrees |
| Declination (decimal) | -35.54861 | degrees |
| V-band apparent magnitude | 14.54 | mag |
| K-band apparent magnitude | 12.87 | mag |
| Transit duration | 0.1500 ( 3.600 ) | day hour |
| Transit depth | 0.8 | % |
| Time of mid-transit | 2458564.4506 ± 0.0007 | HJD or BJD |
| Orbital period | 3.05125 ± 0.00001 | days |
| Reference for orbital ephemeris | 2021MNRAS.504.6018T |
| Quantity | Value | Unit |
|---|---|---|
| Stellar effective temperature | 5610 ± 150 | K |
| Stellar metal abundance ([Fe/H] or [M/H]) | +0.15 ± 0.1 | dex |
| Stellar mass | 1.003 +0.030 −0.025 | Msun |
| Stellar radius | 1.39 ± 0.21 | Rsun |
| Stellar logarithmic surface gravity | 4.15 ± 0.07 | c.g.s. |
| Stellar mean density | ρsun g cm-3 | |
| Orbital eccentricity | 0.0 | |
| Orbital semimajor axis | 0.0448 ± 0.0068 | AU |
| Planetary mass | 0.409 +0.081 −0.063 ( 130 +25 −20 ) | Mjup Mearth |
| Planetary radius | 1.21 ± 0.18 ( 13.6 ± 2.0 ) | Rjup Rearth |
| Planetary surface gravity | m/s2 log(cgs) | |
| Planetary mean density | 0.21 +0.19 −0.09 ( 0.28 +0.25 −0.12 ) | ρjup g cm-3 |
| Planetary equilibrium temperature | 1381 +55 −53 | K |
| Reference of detailed study | 2021MNRAS.504.6018T |
NGTS-18 does not have an entry in the catalogue of orbital obliquity measurements.
Page generated on 2025/01/01 John Southworth (Keele University, UK)