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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: 6:38  
clear_day Transit: 12:10  
SunsetSet: 17:43
sleep NighttimeWhat's Visible Now?
All Constellations » Serpens » 

11 Serpentis

Altitude: -13.3°   Azimuth: 74.8°   Direction: East-North-East

11 Serpentis is a hypergiant star in the constellation of Serpens.

11 Serpentis visual magnitude is 5.51. Because of its reltive faintness, 11 Serpentis should be visible only from locations with dark skies, while it is not visible at all from skies affected by light pollution.

The proper motion of 11 Serpentis is -0.017 arcsec per year in Right Ascension and -0.042 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of 11 Serpentis star
DSS2 image of 11 Serpentis. The red arrow shows the motion of 11 Serpentis during the next 10000 years (-2.83 arcmin in Right Ascension and -7.00 arcmin in declination);

Key facts about 11 Serpentis


11 Serpentis is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -13.3°
Azimuth: 74.8°
Direction: East-North-East

Celestial coordinates and finder chart of 11 Serpentis

11 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 11 Serpentis are provided in the following table:

15h 32m 57s
-01° 11’ 11”

The simplified sky map below shows the position of 11 Serpentis in the sky:

Finder chart 11 Serpentis star
Simplified finder chart for 11 Serpentis.

Visibility of 11 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 11 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: 91.2°
Max altitude: 37.3°
Azimuth: 268.8°

Distance of 11 Serpentis from the Sun and relative movement

11 Serpentis is distant 270.32 light years from the Sun and it is moving towards the Sun at the speed of 16 kilometers per second.

82.92 pc
270.32 ly
-16 km/s
-0.017 arcsec/year
-0.042 arcsec/year

Spectral properties of 11 Serpentis

11 Serpentis belongs to spectral class K0 and has a luminosity class of III corresponding to a hypergiant star.


The red dot in the diagram below shows where 11 Serpentis is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 11 Serpentis. Attribution: Richard Powell / CC BY-SA

Alternative designations of 11 Serpentis

11 Serpentis