This page summarises the information held within TEPCat for the transiting planetary system HAT-P-42. Please see here for descriptions of the quantities given below.
| Quantity | Value | Unit |
|---|---|---|
| Reference of discovery paper | 2013A+A...558A..86B | |
| Date of discovery paper | 2013 / 1 / 1 | y / m / d |
| Data/telescope used for discovery | HAT | |
| Right ascension | 09 01 22.66 | h m s |
| Declination | +06 05 50.0 | d m s |
| Right ascension (decimal) | 135.34442 | degrees |
| Declination (decimal) | 6.09722 | degrees |
| V-band apparent magnitude | 12.17 | mag |
| K-band apparent magnitude | 10.63 | mag |
| Transit duration | 0.1680 ( 4.032 ) | day hour |
| Transit depth | 0.8 | % |
| Time of mid-transit | 2455952.5253 ± 0.0015 | HJD or BJD |
| Orbital period | 4.6418410 ± 0.0000021 | days |
| Reference for orbital ephemeris | arXiv:2312.03319 |
| Quantity | Value | Unit |
|---|---|---|
| Stellar effective temperature | 5743 ± 50 | K |
| Stellar metal abundance ([Fe/H] or [M/H]) | +0.27 ± 0.08 | dex |
| Stellar mass | 1.178 ± 0.068 | Msun |
| Stellar radius | 1.530 ± 0.140 | Rsun |
| Stellar logarithmic surface gravity | 4.14 ± 0.07 | c.g.s. |
| Stellar mean density | ρsun g cm-3 | |
| Orbital eccentricity | 0.0 +0.2 −0.0 | |
| Orbital semimajor axis | 0.0575 ± 0.0011 | AU |
| Planetary mass | 1.044 ± 0.083 ( 331 ± 26 ) | Mjup Mearth |
| Planetary radius | 1.280 ± 0.153 ( 14.3 ± 1.7 ) | Rjup Rearth |
| Planetary surface gravity | 15.8 ± 3.7 3.20 ± 0.09 | m/s2 log(cgs) |
| Planetary mean density | 0.46 +0.26 −0.11 ( 0.61 +0.34 −0.15 ) | ρjup g cm-3 |
| Planetary equilibrium temperature | 1428 ± 60 | K |
| Reference of detailed study | 2013A+A...558A..86B |
HAT-P-42 does not have an entry in the catalogue of orbital obliquity measurements.
Page generated on 2025/03/17 John Southworth (Keele University, UK)