This page summarises the information held within TEPCat for the transiting planetary system KELT-18. Please see here for descriptions of the quantities given below.
| Quantity | Value | Unit |
|---|---|---|
| Reference of discovery paper | 2017AJ....153..263M | |
| Date of discovery paper | 2017 / 2 / 7 | y / m / d |
| Data/telescope used for discovery | KELT | |
| Right ascension | 14 26 05.78 | h m s |
| Declination | +59 26 39.2 | d m s |
| Right ascension (decimal) | 216.52408 | degrees |
| Declination (decimal) | 59.44422 | degrees |
| V-band apparent magnitude | 10.21 | mag |
| K-band apparent magnitude | 9.21 | mag |
| Transit duration | 0.1935 ( 4.644 ) | day hour |
| Transit depth | 0.85 | % |
| Time of mid-transit | 2457542.52463 ± 0.00057 | HJD or BJD |
| Orbital period | 2.8716992 ± 0.0000013 | days |
| Reference for orbital ephemeris | 2020AcA....70..181M |
| Quantity | Value | Unit |
|---|---|---|
| Stellar effective temperature | 6670 ± 120 | K |
| Stellar metal abundance ([Fe/H] or [M/H]) | +0.09 ± 0.13 | dex |
| Stellar mass | 1.524 +0.069 −0.068 | Msun |
| Stellar radius | 1.908 +0.042 −0.035 | Rsun |
| Stellar logarithmic surface gravity | 4.060 +0.010 −0.014 | c.g.s. |
| Stellar mean density | 0.220 +0.005 −0.010 ( 0.3104 +0.0071 −0.0141 ) | ρsun g cm-3 |
| Orbital eccentricity | 0.0 +0.27 −0.0 | |
| Orbital semimajor axis | 0.04550 +0.00067 −0.00069 | AU |
| Planetary mass | 1.18 ± 0.11 ( 375 ± 34 ) | Mjup Mearth |
| Planetary radius | 1.570 +0.042 −0.036 ( 17.60 + 0.47 − 0.40 ) | Rjup Rearth |
| Planetary surface gravity | 11.8 ± 1.1 3.07 ± 0.04 | m/s2 log(cgs) |
| Planetary mean density | 0.284 ± 0.030 ( 0.377 ± 0.040 ) | ρjup g cm-3 |
| Planetary equilibrium temperature | 2085 +39 −38 | K |
| Reference of detailed study | 2017AJ....153..263M |
KELT-18 does not have an entry in the catalogue of orbital obliquity measurements.
Page generated on 2023/09/01 John Southworth (Keele University, UK)