This page summarises the information held within TEPCat for the transiting planetary system HD 191939d. Please see here for descriptions of the quantities given below.
| Quantity | Value | Unit |
|---|---|---|
| Reference of discovery paper | 2020AJ....160..113B | |
| Date of discovery paper | 2020 / 2 / 11 | y / m / d |
| Data/telescope used for discovery | TESS | |
| Right ascension | 20 08 06.15 | h m s |
| Declination | +66 51 01.1 | d m s |
| Right ascension (decimal) | 302.02562 | degrees |
| Declination (decimal) | 66.85031 | degrees |
| V-band apparent magnitude | 8.97 | mag |
| K-band apparent magnitude | 7.18 | mag |
| Transit duration | 0.223 ( 5.35 ) | day hour |
| Transit depth | 0.10 | % |
| Time of mid-transit | 2459433.9060 ± 0.0007 | HJD or BJD |
| Orbital period | 38.353037 ± 0.000060 | days |
| Reference for orbital ephemeris | 2023A+A...669A..40O |
| Quantity | Value | Unit |
|---|---|---|
| Stellar effective temperature | 5427 ± 50 | K |
| Stellar metal abundance ([Fe/H] or [M/H]) | −0.16 ± 0.08 | dex |
| Stellar mass | 0.92 ± 0.06 | Msun |
| Stellar radius | 0.945 ± 0.021 | Rsun |
| Stellar logarithmic surface gravity | 4.40 ± 0.10 | c.g.s. |
| Stellar mean density | 1.16 +0.62 −0.28 ( 1.64 +0.87 −0.40 ) | ρsun g cm-3 |
| Orbital eccentricity | 0.031 +0.018 −0.012 | |
| Orbital semimajor axis | 0.2132 +0.0065 −0.0061 | AU |
| Planetary mass | 0.0088 ± 0.0019 ( 2.80 ± 0.60 ) | Mjup Mearth |
| Planetary radius | 0.2672 ± 0.0062 ( 2.995 ± 0.069 ) | Rjup Rearth |
| Planetary surface gravity | 3.1 ± 0.7 2.49 ± 0.09 | m/s2 log(cgs) |
| Planetary mean density | 0.43 ± 0.10 ( 0.57 ± 0.13 ) | ρjup g cm-3 |
| Planetary equilibrium temperature | 540 ± 11 | K |
| Reference of detailed study | 2023A+A...669A..40O |
HD 191939d does not have an entry in the catalogue of orbital obliquity measurements.
Page generated on 2025/03/24 John Southworth (Keele University, UK)