This page summarises the information held within TEPCat for the transiting planetary system HD 149026. Please see here for descriptions of the quantities given below.
| Quantity | Value | Unit |
|---|---|---|
| Reference of discovery paper | 2005ApJ...633..465S | |
| Date of discovery paper | 2005 / 5 / 31 | y / m / d |
| Data/telescope used for discovery | other | |
| Right ascension | 16 30 29.62 | h m s |
| Declination | +38 20 50.3 | d m s |
| Right ascension (decimal) | 247.62342 | degrees |
| Declination (decimal) | 38.34731 | degrees |
| V-band apparent magnitude | 8.16 | mag |
| K-band apparent magnitude | 6.82 | mag |
| Transit duration | 0.135 ( 3.24 ) | day hour |
| Transit depth | 0.3 | % |
| Time of mid-transit | 2454456.78760 ± 0.00016 | HJD or BJD |
| Orbital period | 2.87588874 ± 0.00000059 | days |
| Reference for orbital ephemeris | 2018AJ....155...83Z |
| Quantity | Value | Unit |
|---|---|---|
| Stellar effective temperature | 6147 ± 50 | K |
| Stellar metal abundance ([Fe/H] or [M/H]) | +0.36 ± 0.05 | dex |
| Stellar mass | 1.345 ± 0.020 | Msun |
| Stellar radius | 1.541 +0.046 −0.042 | Rsun |
| Stellar logarithmic surface gravity | 4.189 +0.020 −0.021 | c.g.s. |
| Stellar mean density | 0.353 +0.030 −0.040 ( 0.498 +0.042 −0.056 ) | ρsun g cm-3 |
| Orbital eccentricity | 0.0 | |
| Orbital semimajor axis | 0.04313 +0.00065 −0.00056 | AU |
| Planetary mass | 0.368 +0.013 −0.014 ( 116.98 +4.13 −4.45 ) | Mjup Mearth |
| Planetary radius | 0.813 +0.027 −0.025 ( 9.11 +0.30 −0.28 ) | Rjup Rearth |
| Planetary surface gravity | 13.55 +0.94 −1.05 3.13 +0.03 −0.04 | m/s2 log(cgs) |
| Planetary mean density | 0.68 +0.08 −0.07 ( 0.902 +0.106 −0.093 ) | ρjup g cm-3 |
| Planetary equilibrium temperature | 1634 +90 −23 | K |
| Reference of detailed study | 2009ApJ...696..241C |
| Reference | λ (degrees) |
|---|---|
| Wolf et al. (2007) | −12 ± 15 |
| Albrecht et al. (2012) | 12 ± 7 |
| Biassoni et al. (2024) | 2.5 + 5.4 - 5.3 |
Page generated on 2025/03/17 John Southworth (Keele University, UK)