This page summarises the information held within TEPCat for the transiting planetary system HAT-P-31. Please see here for descriptions of the quantities given below.
| Quantity | Value | Unit |
|---|---|---|
| Reference of discovery paper | 2011AJ....142...95K | |
| Date of discovery paper | 2011 / 6 / 8 | y / m / d |
| Data/telescope used for discovery | HAT | |
| Right ascension | 18 06 09.00 | h m s |
| Declination | +26 25 36.0 | d m s |
| Right ascension (decimal) | 271.53750 | degrees |
| Declination (decimal) | 26.42667 | degrees |
| V-band apparent magnitude | 11.66 | mag |
| K-band apparent magnitude | 10.08 | mag |
| Transit duration | 0.214 ( 5.14 ) | day hour |
| Transit depth | 0.51 | % |
| Time of mid-transit | 2458169.9410 ± 0.0017 | HJD or BJD |
| Orbital period | 5.0052724 ± 0.0000063 | days |
| Reference for orbital ephemeris | 2019A+A...622A..81M |
| Quantity | Value | Unit |
|---|---|---|
| Stellar effective temperature | 6065 ± 100 | K |
| Stellar metal abundance ([Fe/H] or [M/H]) | +0.15 ± 0.08 | dex |
| Stellar mass | 1.218 +0.089 −0.063 | Msun |
| Stellar radius | 1.36 +0.27 −0.18 | Rsun |
| Stellar logarithmic surface gravity | 4.26 +0.11 −0.13 | c.g.s. |
| Stellar mean density | 0.49 +0.17 −0.18 ( 0.69 +0.24 −0.25 ) | ρsun g cm-3 |
| Orbital eccentricity | 0.2450 ± 0.0045 | |
| Orbital semimajor axis | 0.055 ± 0.015 | AU |
| Planetary mass | 2.171 +0.105 −0.077 ( 690 +33 −24 ) | Mjup Mearth |
| Planetary radius | 1.07 +0.24 −0.16 ( 12.0 + 2.7 − 1.8 ) | Rjup Rearth |
| Planetary surface gravity | 41 +17 −21 3.6 +0.2 −0.3 | m/s2 log(cgs) |
| Planetary mean density | 1.64 +0.93 −0.70 ( 2.18 +1.23 −0.93 ) | ρjup g cm-3 |
| Planetary equilibrium temperature | 1450 +230 −110 | K |
| Reference of detailed study | 2011AJ....142...95K |
HAT-P-31 does not have an entry in the catalogue of orbital obliquity measurements.
Page generated on 2024/09/10 John Southworth (Keele University, UK)