hip-10155

Its story

15 Arietis is an M-type variable red giant some 559 light-years away, in the small constellation of the Ram. Its cool atmosphere modulates its brightness around magnitude 5.68, beyond the comfortable threshold of the unaided eye. Aries was the first zodiacal sign in many ancient traditions and still marks the historical vernal point; among its stars, this variable beats with a slow rhythm indifferent to the human calendar.