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:

Color of ε Serpentis ⬤

Magnitude of ε Serpentis 3.71

Class Main-sequence

VISIBILITY RIGHT NOW ε Serpentis (epsilon Serpentis) is above the horizon from Greenwich, United Kingdom [change]. Altitude: 13°.

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:

Right Ascension J2000 15h 50m 48s

Declination J2000 +04° 28’ 40”

Galactic Longitude 13.15°

Galactic Latitude 41.66°

Constellation 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° RISE 21:53

Max altitude: 43.0° TRANSIT 4:17

Azimuth: 274.5° SET 10:38

RIGHT NOW 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.

Distance (parsec) 21.56 pc

Distance (light year) 70.27 ly

Heliocentric radial velocity -9 km/s

Proper Motion RA 0.128 arcsec/year

Proper Motion Dec 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.

Absolute magnitude 2.04

Spectral Type A2V

Color Index (B-V) 0.15

Temperature of ε Serpentis 8571K

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

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

Alternative designations of ε Serpentis

Bayer designation ε Serpentis
(epsilon Serpentis)

Flamsteed designation 37 Serpentis

Henry Draper Catalogue HD141795

SAO Catalogue SAO121218

Hipparcos Catalogue HIP77622

Durchmusterung Catalogue BD+04 3069

Gliese Catalogue NN 3921

FK5 Catalogue 588

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