This page summarises the information held within TEPCat for the transiting planetary system HAT-P-12. Please see here for descriptions of the quantities given below.
| Quantity | Value | Unit |
|---|---|---|
| Reference of discovery paper | 2009ApJ...706..785H | |
| Date of discovery paper | 2009 / 4 / 29 | y / m / d |
| Data/telescope used for discovery | HAT | |
| Right ascension | 13 57 33.47 | h m s |
| Declination | +43 29 36.8 | d m s |
| Right ascension (decimal) | 209.38946 | degrees |
| Declination (decimal) | 43.49356 | degrees |
| V-band apparent magnitude | 12.8 | mag |
| K-band apparent magnitude | 10.11 | mag |
| Transit duration | 0.0974 ( 2.338 ) | day hour |
| Transit depth | 2.0 | % |
| Time of mid-transit | 2456446.635829 ± 0.000036 | HJD or BJD |
| Orbital period | 3.21305766 ± 0.00000013 | days |
| Reference for orbital ephemeris | 2018A+A...620A.142A |
| Quantity | Value | Unit |
|---|---|---|
| Stellar effective temperature | 4665 ± 45 | K |
| Stellar metal abundance ([Fe/H] or [M/H]) | −0.20 ± 0.09 | dex |
| Stellar mass | 0.691 ± 0.023 | Msun |
| Stellar radius | 0.679 ± 0.013 | Rsun |
| Stellar logarithmic surface gravity | 4.614 ± 0.012 | c.g.s. |
| Stellar mean density | 2.205 ± 0.077 ( 3.11 ± 0.11 ) | ρsun g cm-3 |
| Orbital eccentricity | 0.0 | |
| Orbital semimajor axis | 0.03767 ± 0.00063 | AU |
| Planetary mass | 0.201 ± 0.012 ( 63.9 ± 3.8 ) | Mjup Mearth |
| Planetary radius | 0.919 ± 0.023 ( 10.30 ± 0.26 ) | Rjup Rearth |
| Planetary surface gravity | 5.89 ± 0.34 2.77 ± 0.02 | m/s2 log(cgs) |
| Planetary mean density | 0.242 ± 0.017 ( 0.321 ± 0.023 ) | ρjup g cm-3 |
| Planetary equilibrium temperature | 955 ± 11 | K |
| Reference of detailed study | 2018A+A...613A..41M |
| Reference | λ (degrees) |
|---|---|
| Mancini et al. (2018) | −54 + 41 - 13 |
Page generated on 2025/03/24 John Southworth (Keele University, UK)