This page summarises the information held within TEPCat for the transiting planetary system HAT-P-8. Please see here for descriptions of the quantities given below.
| Quantity | Value | Unit |
|---|---|---|
| Reference of discovery paper | 2009ApJ...704.1107L | |
| Date of discovery paper | 2008 / 12 / 8 | y / m / d |
| Data/telescope used for discovery | HAT | |
| Right ascension | 22 52 09.86 | h m s |
| Declination | +35 26 49.6 | d m s |
| Right ascension (decimal) | 343.04108 | degrees |
| Declination (decimal) | 35.44711 | degrees |
| V-band apparent magnitude | 10.30 | mag |
| K-band apparent magnitude | 8.95 | mag |
| Transit duration | 0.1587 ( 3.809 ) | day hour |
| Transit depth | 0.7 | % |
| Time of mid-transit | 2454437.6742 ± 0.0014 | HJD or BJD |
| Orbital period | 3.0763458 ± 0.0000024 | days |
| Reference for orbital ephemeris | 2013A+A...551A..11M |
| Quantity | Value | Unit |
|---|---|---|
| Stellar effective temperature | 6200 ± 80 | K |
| Stellar metal abundance ([Fe/H] or [M/H]) | +0.01 ± 0.08 | dex |
| Stellar mass | 1.192 ± 0.075 | Msun |
| Stellar radius | 1.475 ± 0.034 | Rsun |
| Stellar logarithmic surface gravity | 4.177 ± 0.022 | c.g.s. |
| Stellar mean density | 0.517 ± 0.035 ( 0.729 ± 0.049 ) | ρsun g cm-3 |
| Orbital eccentricity | 0.0 | |
| Orbital semimajor axis | 0.04390 ± 0.00091 | AU |
| Planetary mass | 1.275 ± 0.053 ( 405 ± 16 ) | Mjup Mearth |
| Planetary radius | 1.321 ± 0.040 ( 14.81 ± 0.45 ) | Rjup Rearth |
| Planetary surface gravity | 18.11 ± 0.82 3.26 ± 0.02 | m/s2 log(cgs) |
| Planetary mean density | 0.371 ± 0.022 ( 0.492 ± 0.029 ) | ρjup g cm-3 |
| Planetary equilibrium temperature | 1713 ± 27 | K |
| Reference of detailed study | 2013A+A...551A..11M |
| Reference | λ (degrees) |
|---|---|
| Simpson et al. (2011) | −9.7 + 9.0 - 7.7 |
| Moutou et al. (2011) | −17 + 9.2 - 11.5 |
Page generated on 2024/09/10 John Southworth (Keele University, UK)