Tags: Star.
U Orionis (abbreviated U Ori) is a Mira-type variable star in the constellation Orion. It is a classical long period variable star that has been well observed from the United Kingdom for over 120 years. It was discovered on 1885 December 13 by J.E. Gore and initially it was thought to be a nova in the early stages of decline (Gore’s Nova and NOVA Ori 1885 as still listed in SIMBAD) but a spectrum taken at Harvard showed features similar to that of Mira.