This page summarises the information held within TEPCat for the transiting planetary system HAT-P-9. Please see here for descriptions of the quantities given below.
| Quantity | Value | Unit |
|---|---|---|
| Reference of discovery paper | 2009ApJ...690.1393S | |
| Date of discovery paper | 2008 / 6 / 25 | y / m / d |
| Data/telescope used for discovery | HAT | |
| Right ascension | 07 20 40.48 | h m s |
| Declination | +37 08 26.2 | d m s |
| Right ascension (decimal) | 110.16867 | degrees |
| Declination (decimal) | 37.14061 | degrees |
| V-band apparent magnitude | 12.30 | mag |
| K-band apparent magnitude | 11.02 | mag |
| Transit duration | 0.143 ( 3.43 ) | day hour |
| Transit depth | 1.3 | % |
| Time of mid-transit | 2454417.9084 ± 0.0006 | HJD or BJD |
| Orbital period | 3.922814 ± 0.000002 | days |
| Reference for orbital ephemeris | 2012NewA...17..438D |
| Quantity | Value | Unit |
|---|---|---|
| Stellar effective temperature | 6350 ± 150 | K |
| Stellar metal abundance ([Fe/H] or [M/H]) | +0.12 ± 0.20 | dex |
| Stellar mass | 1.28 ± 0.10 | Msun |
| Stellar radius | 1.339 ± 0.080 | Rsun |
| Stellar logarithmic surface gravity | 4.293 ± 0.046 | c.g.s. |
| Stellar mean density | 0.534 ± 0.082 ( 0.75 ± 0.12 ) | ρsun g cm-3 |
| Orbital eccentricity | 0.0 | |
| Orbital semimajor axis | 0.0529 ± 0.0014 | AU |
| Planetary mass | 0.778 ± 0.083 ( 247 ± 26 ) | Mjup Mearth |
| Planetary radius | 1.38 ± 0.10 ( 15.5 ± 1.1 ) | Rjup Rearth |
| Planetary surface gravity | 10.1 ± 1.7 3.00 ± 0.07 | m/s2 log(cgs) |
| Planetary mean density | 0.275 ± 0.066 ( 0.365 ± 0.088 ) | ρjup g cm-3 |
| Planetary equilibrium temperature | 1540 ± 53 | K |
| Reference of detailed study | 2012MNRAS.426.1291S |
| Reference | λ (degrees) |
|---|---|
| Moutou et al. (2011) | −16 ± 8 |
Page generated on 2025/03/17 John Southworth (Keele University, UK)