This page summarises the information held within TEPCat for the transiting planetary system HAT-P-2. Please see here for descriptions of the quantities given below.
| Quantity | Value | Unit |
|---|---|---|
| Reference of discovery paper | 2007ApJ...670..826B | |
| Date of discovery paper | 2007 / 4 / 29 | y / m / d |
| Data/telescope used for discovery | HAT | |
| Right ascension | 16 20 36.36 | h m s |
| Declination | +41 02 53.1 | d m s |
| Right ascension (decimal) | 245.15150 | degrees |
| Declination (decimal) | 41.04808 | degrees |
| V-band apparent magnitude | 8.71 | mag |
| K-band apparent magnitude | 7.60 | mag |
| Transit duration | 0.1787 ( 4.289 ) | day hour |
| Transit depth | 0.6 | % |
| Time of mid-transit | 2458956.23792 ± 0.00013 | HJD or BJD |
| Orbital period | 5.6334665 ± 0.0000014 | days |
| Reference for orbital ephemeris | 2023ApJS..268....2S |
| Quantity | Value | Unit |
|---|---|---|
| Stellar effective temperature | 6290 ± 60 | K |
| Stellar metal abundance ([Fe/H] or [M/H]) | +0.14 ± 0.08 | dex |
| Stellar mass | 1.279 ± 0.046 | Msun |
| Stellar radius | 1.680 ± 0.150 | Rsun |
| Stellar logarithmic surface gravity | 4.092 ± 0.074 | c.g.s. |
| Stellar mean density | 0.268 ± 0.070 ( 0.378 ± 0.099 ) | ρsun g cm-3 |
| Orbital eccentricity | 0.5091 ± 0.0005 | |
| Orbital semimajor axis | 0.06740 ± 0.00081 | AU |
| Planetary mass | 9.02 ± 0.10 ( 2867 ± 31 ) | Mjup Mearth |
| Planetary radius | 1.190 ± 0.120 ( 13.3 ± 1.3 ) | Rjup Rearth |
| Planetary surface gravity | 152 ± 30 4.18 ± 0.08 | m/s2 log(cgs) |
| Planetary mean density | 5.1 ± 1.5 ( 6.8 ± 2.0 ) | ρjup g cm-3 |
| Planetary equilibrium temperature | 1516 ± 66 | K |
| Reference of detailed study | 2023AJ....166..136D |
| Reference | λ (degrees) |
|---|---|
| Winn et al. (2007) | 1.2 ± 13.4 |
| Loeillet et al. (2008) | 0.2 + 12.2 - 12.5 |
| Albrecht et al. (2012) | 9 ± 10 |
Page generated on 2024/09/04 John Southworth (Keele University, UK)