Epsilon Serpentis
White-hued Am star in Serpens Caput.
Epsilon Serpentis, also called ε Serpentis, is a solitary white star in the head of the Serpens constellation. With an apparent magnitude of +3.69, it is visible without a telescope. Parallax measurements place it 70 light-years from Earth, and it is moving toward our solar system at 9 kilometers per second.
Quick Facts
- Apparent visual magnitude
- +3.69
- Distance from sun
- 70 light years
- Radial velocity
- −9 km/s
- Stellar classification
- kA2hA5mA7 V
- Mass
- 1.82 times the Sun's mass
- Radius
- 1.78 times the Sun's radius
- Luminosity
- 12 times the Sun's luminosity
- Effective temperature
- 7,928 K
Facts from the source article.
Etymology
Epsilon Serpentis was a member of the indigenous Arabic asterism al-Nasaq al-Yamānī, "the Southern Line" of al-Nasaqān "the Two Lines", along with α Ser, δ Ser, δ Oph, ε Oph, ζ Oph and γ Oph. In the catalogue of stars in Technical Memorandum 33-507, al-Nasaq al-Yamānī or Nasak Yamani was the title for two stars: δ Ser as Nasak Yamani I and ε Ser as Nasak Yamani II. In Chinese, the asterism Right Wall of Heavenly Market Enclosure includes ε Serpentis, and the star itself represents the state Ba (巴) (or Pa).
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