HD 165634

HD 165634 is a star located in the constellation Sagittarius. It is a G-type main-sequence star, similar to our Sun, but slightly larger and more luminous. The star is not visible to the naked eye, requiring a telescope for observation.

Information about HD 165634, beyond its basic stellar classification and location, can vary depending on the database and observational data available. Specific details that might be cataloged include its spectral type (which refines its classification within the G-type), its apparent magnitude (brightness as seen from Earth), its distance from Earth (usually measured in light-years), its radial velocity (how fast it is moving towards or away from us), its proper motion (how fast it is moving across our line of sight), its effective temperature (surface temperature), its luminosity (total energy output), its radius, and its mass.

The star's age and metallicity (the abundance of elements heavier than hydrogen and helium) are also frequently studied as they provide insights into the star's formation and evolutionary history. Planetary searches have been conducted around many stars, including those of similar type to HD 165634, but there is no currently confirmed planetary system associated with HD 165634 itself. However, the lack of confirmed planets does not exclude the possibility of their existence, as detection methods are continually improving.

The "HD" designation refers to the Henry Draper Catalogue, a comprehensive stellar catalog compiled in the late 19th and early 20th centuries. The number following "HD" is the star's entry number in that catalogue.