HD219134

HD 219134 is a star catalogued in the Henry Draper catalog that lies relatively near to the Sun. It is known primarily as the host of a system of exoplanets. The star is a late-type dwarf; its proximity and brightness have made it a frequent target for exoplanet studies.

The planetary system includes at least one planet that transits the star, allowing measurements of its radius. The transiting planet was identified by combining precision photometry with follow-up observations. In addition, long-term radial-velocity monitoring has revealed additional planetary companions in the system that do not transit, indicating a compact multi-planet architecture.

Observational history: Exoplanets around HD 219134 were detected using high-precision spectroscopy to measure Doppler shifts in the star's spectrum, and the transiting planet's signal was confirmed through space-based or ground-based photometry. The star's relative brightness and nearby distance have facilitated measurements of planetary masses and radii, enabling constraints on their compositions.

Significance: The HD 219134 system provides a valuable laboratory for studying small, likely rocky exoplanets around nearby stars. Its transiting planet allows combined mass-radius analyses and atmospheric characterization attempts with current instrumentation, contributing to the broader effort to understand the diversity of planetary systems.