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

3 Serpentis

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

3 Serpentis visual magnitude is 5.33. Because of its reltive faintness, 3 Serpentis should be visible only from locations with dark skyes, while it is not visible at all from skyes affected by light pollution.

The table below summarizes the key facts about 3 Serpentis:

5.33
Hypergiant
3 Serpentis is below the horizon from Greenwich, United Kingdom [change].

Celestial coordinates and finder chart of 3 Serpentis

3 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 3 Serpentis are provided in the following table:

15h 15m 11s
+04° 56’ 21”
6.46°
49.21°
Serpens

The simplified sky map below shows the position of 3 Serpentis in the sky:

Finder chart 3 Serpentis star
Simplified finder chart for 3 Serpentis.

Visibility of 3 Serpentis from your location

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

Today's 3 Serpentis rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 85.1°
Max altitude: 43.5°
Azimuth: 274.9°
3 Serpentis is below the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of 3 Serpentis

The image below is a photograph of 3 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 3 Serpentis is -0.018 arcsec per year in Right Ascension and 0.005 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of 3 Serpentis star
DSS2 image of 3 Serpentis. The red arrow shows the motion of 3 Serpentis during the next 10000 years (-3.00 arcmin in Right Ascension and 0.83 arcmin in declination);

Distance of 3 Serpentis from the Sun and relative movement

3 Serpentis is distant 467.05 light years from the Sun and it is moving towards the Sun at the speed of 34 kilometers per second.

143.27 pc
467.05 ly
-34 km/s
-0.018 arcsec/year
0.005 arcsec/year

Spectral properties of 3 Serpentis

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

-0.45
K0III
4537K

The red dot in the diagram below shows where 3 Serpentis is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 3 Serpentis. Attribution: Richard Powell / CC BY-SA

Alternative designations of 3 Serpentis

3 Serpentis
SAO120916
SAO120916