h Eridani

h Eridani is a designation used in the Bayer designation system to refer to a star located in the constellation Eridanus. This system, developed by German astronomer Johann Bayer, uses Greek letters (α, β, γ, etc.) and Roman letters (a, b, c, etc.) to identify stars within a constellation, generally ordered by apparent brightness. However, the order isn't always perfectly adhered to, and other factors like location within the constellation can influence the letter assigned. Therefore, simply knowing that a star is designated with "h" doesn't automatically tell us its brightness relative to other stars in Eridanus. To determine the specific star referred to as h Eridani and learn about its properties (brightness, distance, spectral type, etc.), one needs to consult star catalogs or astronomical databases that specifically list and characterize stars identified by their Bayer designations.