Alterf

Alterf (λ Leonis) is a orange giant star in the constellation Leo. With an apparent magnitude of 4.31 it is the 720th-brightest star in the night sky, and it is about 373 light-years from Earth.

Finder chart showing where Alterf is in the constellation Leo
Alterf (circled) in Leo, with the surrounding constellations and bright stars.
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Facts

ConstellationLeo
Designationλ Leonis (Lambda Leonis), HR 3773
Apparent magnitude4.31 (720th brightest)
Spectral typeK5III
Colororange (B−V 1.54)
Distanceabout 373 light-years
Right ascension9 h 31.7 min
Declination+22.97°
Best monthMarch (at about 9 pm)

Sources: star positions, magnitudes and colors from the Yale Bright Star Catalogue; constellation boundaries and star names from the IAU; areas and distances from Wikidata; stick figures by M. van der Sluys. How the maps are made.

How to find Alterf

Alterf is in Leo. From 40° N it is highest in the south in March evenings, about 73° above the horizon. From 35° S it reaches about 32° in the north. Nearby bright stars: Regulus (14° away), Zosma (24° away) and Pollux (24° away).

Leo constellation →

Other named stars in Leo

RegulusDenebolaZosmaAlgiebaChertanAdhaferaSubraRasalas

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