Your guide to the Solar System and the night sky
🌎 Location: Greenwich, United Kingdom [change]

ε Serpentis (epsilon Serpentis)

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 table below summarizes the key facts about ε Serpentis:

3.71
Main-sequence
ε Serpentis (epsilon Serpentis) is above the horizon from Greenwich, United Kingdom [change]. Altitude: 12°.

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”
13.15°
41.66°
Serpens

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 [change]
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 [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 85.5°
Max altitude: 43.0°
Azimuth: 274.5°
ε Serpentis (epsilon Serpentis) is above the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of ε Serpentis

The image below is a photograph of ε Serpentis from the Digitized Sky Survey 2 (DSS2 - see the credits section) taken in the red channel. The area of sky represented in the image is 0.5x0.5 degrees (30x30 arcmins). 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);

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.

2.04
A2V
8571K

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
SAO121218
SAO121218