This page summarises the information held within TEPCat for the transiting planetary system G 9-40. Please see here for descriptions of the quantities given below.
| Quantity | Value | Unit |
|---|---|---|
| Reference of discovery paper | 2020AJ....159..100S | |
| Date of discovery paper | 2019 / 12 / 2 | y / m / d |
| Data/telescope used for discovery | K2 | |
| Right ascension | 08 58 52.33 | h m s |
| Declination | +21 04 34.2 | d m s |
| Right ascension (decimal) | 134.71804 | degrees |
| Declination (decimal) | 21.07617 | degrees |
| V-band apparent magnitude | 13.82 | mag |
| K-band apparent magnitude | 9.19 | mag |
| Transit duration | 0.0705 ( 1.692 ) | day hour |
| Transit depth | 0.37 | % |
| Time of mid-transit | 2459503.32682 ± 0.00042 | HJD or BJD |
| Orbital period | 5.7459982 ± 0.0000020 | days |
| Reference for orbital ephemeris | 2022A+A...666A.154L |
| Quantity | Value | Unit |
|---|---|---|
| Stellar effective temperature | 3395 ± 51 | K |
| Stellar metal abundance ([Fe/H] or [M/H]) | −0.07 ± 0.16 | dex |
| Stellar mass | 0.295 ± 0.014 | Msun |
| Stellar radius | 0.3026 ± 0.0095 | Rsun |
| Stellar logarithmic surface gravity | 4.84 ± 0.04 | c.g.s. |
| Stellar mean density | 10.00 +0.70 −0.65 ( 14.11 + 0.99 − 0.92 ) | ρsun g cm-3 |
| Orbital eccentricity | 0.0 | |
| Orbital semimajor axis | 0.04180 ± 0.00064 | AU |
| Planetary mass | 0.0126 ± 0.0020 ( 4.01 ± 0.64 ) | Mjup Mearth |
| Planetary radius | 0.1695 ± 0.0058 ( 1.900 ± 0.065 ) | Rjup Rearth |
| Planetary surface gravity | 10.8 ± 1.8 3.03 ± 0.07 | m/s2 log(cgs) |
| Planetary mean density | 2.41 +0.51 −0.40 ( 3.20 +0.68 −0.53 ) | ρjup g cm-3 |
| Planetary equilibrium temperature | 441 ± 8 | K |
| Reference of detailed study | 2022A+A...666A.154L |
G 9-40 does not have an entry in the catalogue of orbital obliquity measurements.
Page generated on 2025/03/17 John Southworth (Keele University, UK)