This page summarises the information held within TEPCat for the transiting planetary system HD 31221. Please see here for descriptions of the quantities given below.
| Quantity | Value | Unit |
|---|---|---|
| Reference of discovery paper | 2023A+A...673L..14K | |
| Date of discovery paper | 2023 / 5 / 9 | y / m / d |
| Data/telescope used for discovery | TESS | |
| Right ascension | 04 54 49.39 | h m s |
| Declination | +22 08 47.4 | d m s |
| Right ascension (decimal) | 73.70579 | degrees |
| Declination (decimal) | 22.14650 | degrees |
| V-band apparent magnitude | 8.02 | mag |
| K-band apparent magnitude | 7.41 | mag |
| Transit duration | 0.17 ( 4.1 ) | day hour |
| Transit depth | 0.8 | % |
| Time of mid-transit | 2459476.5373 ± 0.0014 | HJD or BJD |
| Orbital period | 4.66632 ± 0.00010 | days |
| Reference for orbital ephemeris | 2023A+A...673L..14K |
| Quantity | Value | Unit |
|---|---|---|
| Stellar effective temperature | 7712 ± 240 | K |
| Stellar metal abundance ([Fe/H] or [M/H]) | dex | |
| Stellar mass | 1.447 ± 0.028 | Msun |
| Stellar radius | 1.550 ± 0.060 | Rsun |
| Stellar logarithmic surface gravity | 4.31 ± 0.08 | c.g.s. |
| Stellar mean density | ρsun g cm-3 | |
| Orbital eccentricity | 0.0 | |
| Orbital semimajor axis | AU | |
| Planetary mass | 11.5 ± 10.3 ( 3655 ± 3274 ) | Mjup Mearth |
| Planetary radius | 1.32 ± 0.14 ( 14.8 ± 1.6 ) | Rjup Rearth |
| Planetary surface gravity | m/s2 log(cgs) | |
| Planetary mean density | ρjup g cm-3 | |
| Planetary equilibrium temperature | K | |
| Reference of detailed study | 2023A+A...673L..14K |
HD 31221 does not have an entry in the catalogue of orbital obliquity measurements.
Page generated on 2025/01/01 John Southworth (Keele University, UK)