This page summarises the information held within TEPCat for the transiting planetary system TOI-2257. Please see here for descriptions of the quantities given below.
| Quantity | Value | Unit |
|---|---|---|
| Reference of discovery paper | 2022A+A...657A..45S | |
| Date of discovery paper | 2021 / 11 / 3 | y / m / d |
| Data/telescope used for discovery | TESS | |
| Right ascension | 12 58 57.67 | h m s |
| Declination | +77 39 41.6 | d m s |
| Right ascension (decimal) | 194.74029 | degrees |
| Declination (decimal) | 77.66156 | degrees |
| V-band apparent magnitude | 15.21 | mag |
| K-band apparent magnitude | 10.67 | mag |
| Transit duration | 0.1602 ( 3.845 ) | day hour |
| Transit depth | 0.4 | % |
| Time of mid-transit | 2459007.9795 ± 0.0010 | HJD or BJD |
| Orbital period | 35.189346 ± 0.000090 | days |
| Reference for orbital ephemeris | 2022A+A...657A..45S |
| Quantity | Value | Unit |
|---|---|---|
| Stellar effective temperature | 3430 ± 130 | K |
| Stellar metal abundance ([Fe/H] or [M/H]) | −0.27 ± 0.37 | dex |
| Stellar mass | 0.328 +0.021 −0.019 | Msun |
| Stellar radius | 0.313 ± 0.015 | Rsun |
| Stellar logarithmic surface gravity | 4.971 ± 0.050 | c.g.s. |
| Stellar mean density | 11.2 ± 1.8 ( 15.8 ± 2.5 ) | ρsun g cm-3 |
| Orbital eccentricity | 0.50 +0.22 −0.13 | |
| Orbital semimajor axis | 0.145 ± 0.003 | AU |
| Planetary mass | 0.018 +0.013 −0.007 ( 5.7 +4.1 −2.2 ) | Mjup Mearth |
| Planetary radius | 0.196 ± 0.010 ( 2.20 ± 0.11 ) | Rjup Rearth |
| Planetary surface gravity | m/s2 log(cgs) | |
| Planetary mean density | ρjup g cm-3 | |
| Planetary equilibrium temperature | 256 +61 −17 | K |
| Reference of detailed study | 2022A+A...657A..45S |
TOI-2257 does not have an entry in the catalogue of orbital obliquity measurements.
Page generated on 2025/03/17 John Southworth (Keele University, UK)