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Proper NameNone
Bayer DesignationEta Serpentis
Flamsteed Number58 Serpentis
HR (BSC)6869
ConstellationSerpens (Cauda)
Right Ascension18h 21m 19s
Declination-2° 53' 56"
Distance60 light years
19 parsecs
MagnitudeApparent: +3.25
Absolute: +1.91
Spectral ClassK0III-IV orange giant
Optimum VisibilityJuly
NotesEta Serpentis was formerly considered to be a carbon star showing slight variability, but more recent investigations have concluded that these classifications were incorrect. The star is now usually listed as a K-type orange star, with no recorded variability.

The brightest star in the area known as Serpens Cauda (the Serpent's Tail); its magnitude is +3.25. Eta Serpentis is an orange (K-type) star of a type intermediate between a giant and a subgiant, lying some sixty light years from Earth.

With a declination of only -3°, this star lies very close to the Celestial Equator, and within the band of the Milky Way.

Location of Eta Serpentis

Eta Serpentis lies in the central regions of Serpens Cauda, the Serpent's Tail.

Image of Eta Serpentis

Toward the central regions of the Milky Way, Eta Serpentis shines with an orange light.

Imagery provided by Aladin sky atlas


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