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A Complete Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
SunriseRise: 6:57  
clear_day Transit: 12:11  
SunsetSet: 17:27
sunny DaytimeWhat's Visible Now?
All Constellations » Serpens » 

ε Serpentis (epsilon Serpentis)

Altitude: -8.2°   Azimuth: 288.0°   Direction: West-North-West

ε Serpentis is a main-sequence star in the constellation of Serpens.

ε Serpentis visual magnitude is 3.71. Because of its moderate brightness, ε Serpentis should be easily visible from locations with dark skyes, while it can be barely visible, or not visible at all, from skyes affected by light pollution.

The proper motion of ε Serpentis is 0.128 arcsec per year in Right Ascension and 0.063 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of ε Serpentis (epsilon Serpentis) star
DSS2 image of ε Serpentis. The red arrow shows the motion of ε Serpentis during the next 1000 years (2.13 arcmin in Right Ascension and 1.05 arcmin in declination);

Key facts about ε Serpentis


ε Serpentis (epsilon Serpentis) is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -8.2°
Azimuth: 288.0°
Direction: West-North-West

Celestial coordinates and finder chart of ε Serpentis

ε Serpentis is situated close to the celestial equator, as such, it is at least partly visible from both hemispheres in certain times of the year. Celestial coordinates for the J2000 equinox as well as galactic coordinates of ε Serpentis are provided in the following table:

15h 50m 48s
+04° 28’ 40”

The simplified sky map below shows the position of ε Serpentis in the sky:

Finder chart ε Serpentis (epsilon Serpentis) star
Simplified finder chart for ε Serpentis (epsilon Serpentis).

Visibility of ε Serpentis from your location

Location: Greenwich, United Kingdom edit_location_alt
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

Today's ε Serpentis (epsilon Serpentis) rise, transit and set times from Greenwich, United Kingdom edit_location_alt are the following (all times relative to the local timezone Europe/London):

Azimuth: 85.5°
Max altitude: 43.0°
Azimuth: 274.5°

Distance of ε Serpentis from the Sun and relative movement

ε Serpentis is distant 70.27 light years from the Sun and it is moving towards the Sun at the speed of 9 kilometers per second.

21.56 pc
70.27 ly
-9 km/s
0.128 arcsec/year
0.063 arcsec/year

Spectral properties of ε Serpentis

ε Serpentis belongs to spectral class A2 and has a luminosity class of V corresponding to a main-sequence star.


The red dot in the diagram below shows where ε Serpentis is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of ε Serpentis. Attribution: Richard Powell / CC BY-SA

Alternative designations of ε Serpentis

ε Serpentis
(epsilon Serpentis)
37 Serpentis