This page summarises the information held within TEPCat for the transiting planetary system HAT-P-57. Please see here for descriptions of the quantities given below.
| Quantity | Value | Unit |
|---|---|---|
| Reference of discovery paper | 2015AJ....150..197H | |
| Date of discovery paper | 2015 / 10 / 30 | y / m / d |
| Data/telescope used for discovery | HAT | |
| Right ascension | 18 18 58.32 | h m s |
| Declination | +10 35 50.3 | d m s |
| Right ascension (decimal) | 274.74300 | degrees |
| Declination (decimal) | 10.59731 | degrees |
| V-band apparent magnitude | 10.47 | mag |
| K-band apparent magnitude | 9.43 | mag |
| Transit duration | 0.14578 ( 3.4987 ) | day hour |
| Transit depth | 1.0 | % |
| Time of mid-transit | 2455113.48127 ± 0.00048 | HJD or BJD |
| Orbital period | 2.4652950 ± 0.0000032 | days |
| Reference for orbital ephemeris | 2015AJ....150..197H |
| Quantity | Value | Unit |
|---|---|---|
| Stellar effective temperature | 7500 ± 250 | K |
| Stellar metal abundance ([Fe/H] or [M/H]) | −0.25 ± 0.25 | dex |
| Stellar mass | 1.47 ± 0.12 | Msun |
| Stellar radius | 1.500 ± 0.050 | Rsun |
| Stellar logarithmic surface gravity | 4.251 ± 0.018 | c.g.s. |
| Stellar mean density | 0.436 +0.016 −0.026 ( 0.615 +0.023 −0.037 ) | ρsun g cm-3 |
| Orbital eccentricity | 0.0 | |
| Orbital semimajor axis | 0.0406 ± 0.0011 | AU |
| Planetary mass | 0.0 +1.85 −0.0 ( 0 +588 −0 ) | Mjup Mearth |
| Planetary radius | 1.413 ± 0.054 ( 15.84 ± 0.61 ) | Rjup Rearth |
| Planetary surface gravity | m/s2 log(cgs) | |
| Planetary mean density | ρjup g cm-3 | |
| Planetary equilibrium temperature | 2200 ± 76 | K |
| Reference of detailed study | 2015AJ....150..197H |
HAT-P-57 does not have an entry in the catalogue of orbital obliquity measurements.
Page generated on 2025/03/17 John Southworth (Keele University, UK)