This page summarises the information held within TEPCat for the transiting planetary system HAT-P-26. Please see here for descriptions of the quantities given below.
| Quantity | Value | Unit |
|---|---|---|
| Reference of discovery paper | 2011ApJ...728..138H | |
| Date of discovery paper | 2010 / 10 / 7 | y / m / d |
| Data/telescope used for discovery | HAT | |
| Right ascension | 14 12 37.54 | h m s |
| Declination | +04 03 36.1 | d m s |
| Right ascension (decimal) | 213.15642 | degrees |
| Declination (decimal) | 4.06003 | degrees |
| V-band apparent magnitude | 11.74 | mag |
| K-band apparent magnitude | 9.58 | mag |
| Transit duration | 0.1023 ( 2.455 ) | day hour |
| Transit depth | 0.6 | % |
| Time of mid-transit | 2455304.652182 ± 0.000032 | HJD or BJD |
| Orbital period | 4.23450158 ± 0.00000018 | days |
| Reference for orbital ephemeris | 2022A+A...664A.162M |
| Quantity | Value | Unit |
|---|---|---|
| Stellar effective temperature | 5006 ± 61 | K |
| Stellar metal abundance ([Fe/H] or [M/H]) | −0.023 ± 0.037 | dex |
| Stellar mass | 0.78 ± 0.01 | Msun |
| Stellar radius | 0.91 ± 0.03 | Rsun |
| Stellar logarithmic surface gravity | 4.45 ± 0.05 | c.g.s. |
| Stellar mean density | ρsun g cm-3 | |
| Orbital eccentricity | 0.13 ± 0.06 | |
| Orbital semimajor axis | 0.02742 +0.00063 −0.00041 | AU |
| Planetary mass | 0.048 ± 0.009 ( 15.3 ± 2.9 ) | Mjup Mearth |
| Planetary radius | 0.596 +0.015 −0.012 ( 6.68 +0.17 −0.13 ) | Rjup Rearth |
| Planetary surface gravity | 3.37 +0.61 −0.63 2.53 +0.07 −0.09 | m/s2 log(cgs) |
| Planetary mean density | 0.228 +0.041 −0.044 ( 0.302 +0.054 −0.058 ) | ρjup g cm-3 |
| Planetary equilibrium temperature | 1081 +41 −35 | K |
| Reference of detailed study | 2026A+A...711A.237L |
| Reference | λ (degrees) |
|---|---|
| Luo et al. (2026) | −78 ± 13 |
Page generated on 2026/08/12 John Southworth (Keele University, UK)