HD 189733
HD 189733 · HIP 98505 · 19.8 pc · K2V · 1 confirmed planet
Section 01
General Information
HD 189733 b is the most studied hot Jupiter and one of the best-characterised exoplanet atmospheres. Its vivid cobalt-blue colour comes from silicate glass particles in its atmosphere that scatter blue light. Wind speeds reach ~8700 km/h and it rains molten glass sideways. Its host is a K2V dwarf — an important metallicity comparison point to the solar-type hosts 55 Cnc A and HD 209458.
Stellar Parameters
| Parameter | Symbol | Value | Source |
|---|---|---|---|
| Effective temperature | Teff | ~5050 K | Literature |
| Surface gravity | log g | ~4.56 | Literature |
| Metallicity | [Fe/H] | ~−0.03 dex | Literature |
| Spectral type | — | K2V | Literature |
| Distance | d | 19.8 pc (64.5 ly) | Gaia DR3 |
Known Planets
| Planet | Mass | Type | Semi-major axis | Hab zone |
|---|---|---|---|---|
| HD 189733 b | 1.14 MJ | Hot Jupiter | 0.0313 AU | No — blue hell |
Section 02
NASA Interactive Visualization
Section 04
Our Findings
Section 05
References & Credits
Key Literature
Bouchy et al. (2005), A&A 444, L15 — discovery
Evans et al. (2013), ApJ 772, L16 — blue colour
Knutson et al. (2007), Nature 447 — temperature map
Data Sources
NASA/IPAC Exoplanet Archive
SIMBAD / CDS — stellar parameters
Hipparcos / Gaia — parallax & distance
Image Credits
Credit: NASA/ESA — Artist concept of HD 189733 b
Interactive sky: CDS Aladin Lite v3 / DSS2
NASA Eyes: NASA/JPL-Caltech
Pipeline
HARPS S1D — ESO Science Archive
Analysis: The Exoplanet Codex