HD 99109 (HIP 55664), a yellow subgiant star in Leo

HD 99109 (HIP 55664) is a yellow subgiant star (spectral type G8/K0 IV) in the constellation Leo, 162 light years from Earth at magnitude 9.10.

Ashland Astronomy Studio October 3, 2026 Star

← Back to all stars

// Fade in · only sidebar boxes, never the main content if('IntersectionObserver' in window){var io=new IntersectionObserver(function(es){es.forEach(function(en){if(en.isIntersecting){en.target.style.opacity='1';en.target.style.transform='none';io.unobserve(en.target);}});},{threshold:.05});document.querySelectorAll('.side__box').forEach(function(el){el.style.opacity='0';el.style.transform='translateY(10px)';el.style.transition='opacity .4s ease,transform .4s ease';io.observe(el);});}