This page summarises the information held within TEPCat for the transiting planetary system HAT-P-1. Please see here for descriptions of the quantities given below.
| Quantity | Value | Unit |
|---|---|---|
| Reference of discovery paper | 2007ApJ...656..552B | |
| Date of discovery paper | 2006 / 8 / 12 | y / m / d |
| Data/telescope used for discovery | HAT | |
| Right ascension | 22 57 46.83 | h m s |
| Declination | +38 40 29.8 | d m s |
| Right ascension (decimal) | 344.44512 | degrees |
| Declination (decimal) | 38.67494 | degrees |
| V-band apparent magnitude | 10.4 | mag |
| K-band apparent magnitude | 8.86 | mag |
| Transit duration | 0.11875 ( 2.8500 ) | day hour |
| Transit depth | 1.7 | % |
| Time of mid-transit | 2454363.94778 ± 0.00013 | HJD or BJD |
| Orbital period | 4.46530031 ± 0.00000018 | days |
| Reference for orbital ephemeris | 2024MNRAS.530.2475Y |
| Quantity | Value | Unit |
|---|---|---|
| Stellar effective temperature | 5975 ± 50 | K |
| Stellar metal abundance ([Fe/H] or [M/H]) | +0.13 ± 0.05 | dex |
| Stellar mass | 1.151 ± 0.019 | Msun |
| Stellar radius | 1.174 +0.026 −0.027 | Rsun |
| Stellar logarithmic surface gravity | 4.359 ± 0.014 | c.g.s. |
| Stellar mean density | 0.644 +0.013 −0.016 ( 0.909 +0.018 −0.023 ) | ρsun g cm-3 |
| Orbital eccentricity | 0.0 | |
| Orbital semimajor axis | 0.05561 +0.00082 −0.00083 | AU |
| Planetary mass | 0.525 ± 0.019 ( 166.89 ± 6.04 ) | Mjup Mearth |
| Planetary radius | 1.319 ± 0.019 ( 14.78 ± 0.21 ) | Rjup Rearth |
| Planetary surface gravity | 7.46 ± 0.17 2.873 ± 0.010 | m/s2 log(cgs) |
| Planetary mean density | 0.213 +0.008 −0.007 ( 0.2825 +0.0106 −0.0093 ) | ρjup g cm-3 |
| Planetary equilibrium temperature | 1322 +14 −15 | K |
| Reference of detailed study | 2014MNRAS.437...46N |
| Reference | λ (degrees) |
|---|---|
| Johnson et al. (2008) | 3.7 ± 2.1 |
Page generated on 2025/11/11 John Southworth (Keele University, UK)