This page summarises the information held within TEPCat for the transiting planetary system KELT-9. Please see here for descriptions of the quantities given below.
| Quantity | Value | Unit |
|---|---|---|
| Reference of discovery paper | 2017Natur.546..514G | |
| Date of discovery paper | 2017 / 6 / 6 | y / m / d |
| Right ascension | 20 31 26.35 | h m s |
| Declination | +39 56 19.8 | d m s |
| V-band apparent magnitude | 7.56 | mag |
| K-band apparent magnitude | 7.48 | mag |
| Transit duration | 0.16361 ( 3.9266 ) | day hour |
| Transit depth | 0.68 | % |
| Time of mid-transit | 2457095.68572 ± 0.00014 | HJD or BJD |
| Orbital period | 1.4811235 ± 0.0000011 | days |
| Reference for orbital ephemeris | 2017Natur.546..514G |
| Quantity | Value | Unit |
|---|---|---|
| Stellar effective temperature | 9600 ± 400 | K |
| Stellar metal abundance ([Fe/H] or [M/H]) | +0.14 ± 0.30 | dex |
| Stellar mass | 2.32 ± 0.16 | Msun |
| Stellar radius | 2.418 ± 0.058 | Rsun |
| Stellar logarithmic surface gravity | 4.037 +0.038 −0.040 | c.g.s. |
| Stellar mean density | 0.164 ± 0.018 ( 0.231 ± 0.025 ) | ρsun g cm-3 |
| Orbital eccentricity | 0.0 +0.035 −0.0 | |
| Orbital semimajor axis | 0.03368 ± 0.00078 | AU |
| Planetary mass | 2.88 ± 0.35 ( 915 ± 111 ) | Mjup Mearth |
| Planetary radius | 1.936 ± 0.047 ( 21.70 ± 0.53 ) | Rjup Rearth |
| Planetary surface gravity | 19.0 +2.5 −2.4 3.28 +0.05 −0.06 | m/s2 log(cgs) |
| Planetary mean density | 0.370 +0.054 −0.050 ( 0.491 +0.072 −0.066 ) | ρjup g cm-3 |
| Planetary equilibrium temperature | 3921 +182 −174 | K |
| Reference of detailed study | arXiv:1907.10078 |
| Reference | λ (degrees) |
|---|---|
| Gaudi et al. (2017) | −84.8 ± 1.4 |
| Borsa et al. (2019) | −85.78 ± 0.46 |
| Wyttenbach et al. (2020) | −85.01 ± 0.23 |
KELT-9 has not been analysed as part of the Homogeneous Studies of Transiting Extrasolar Planets project.
Page generated on 2021/01/04 John Southworth (Keele University, UK)