Epsilon Delphini (ε Delphini, abbreviated Eps Del, ε Del), officially named Aldulfin /ælˈdʌlfən/,[12] is a solitary,[13] blue-white hued star in the northern constellation of Delphinus.

[2] Based upon an annual parallax shift of 9.87 mas as seen from the Earth,[1] the system is located about 330 light-years from the Sun.

At Epsilon Delphini's distance, the visual magnitude is diminished by an extinction factor of 0.11 due to interstellar dust.

[4] It has 4.6[7] times the Sun's radius and is radiating 676[8] times the solar luminosity from its photosphere at an effective temperature of 13,614 K.[7] The star may be slightly variable, occasionally brightening to magnitude 3.95.

[16] Consequently, the Chinese name for Epsilon Delphini itself is 敗瓜一 (Bài Guā yī, English: the First Star of Rotten Gourd.).