Aldulfin

Aldulfin (ε Delphini) is a blue-white giant star in the constellation Delphinus. With an apparent magnitude of 4.03 it is the 539th-brightest star in the night sky, and it is about 366 light-years from Earth.

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

ConstellationDelphinus
Designationε Delphini (Epsilon Delphini), HR 7852
Apparent magnitude4.03 (539th brightest)
Spectral typeB6III
Colorblue-white (B−V -0.13)
Distanceabout 366 light-years
Right ascension20 h 33.2 min
Declination+11.30°
Best monthSeptember (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 Aldulfin

Aldulfin is in Delphinus. From 40° N it is highest in the south in September evenings, about 61° above the horizon. From 35° S it reaches about 44° in the north. Nearby bright stars: Altair (11° away), Enif (17° away) and Aljanah (23° away).

Delphinus constellation →

Other named stars in Delphinus

RotanevSualocin

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