Eta Leo is a white supergiant with the stellar classification A0Ib.
Though its apparent magnitude is 3.5, making it a relatively dim star to the naked eye,
it is nearly 20,000 times more luminous than the Sun, with an absolute magnitude of -5.60.
The Hipparcos astrometric data has estimated the distance of Eta Leonis to be
roughly 400 parsecs from Earth, or 1,300 light years away. Wikipedia
Leo constellation map by Torsten Bronger / CC BY SA, altered