σ Serpentis (sigma Serpentis)

Above the horizon. Rise: 18:37 | Tran: 0:40 | Set: 6:47

Alt: 34.82° Az: 212.80° Direction: South-South-West

σ Serpentis is a hypergiant star of spectral class F0 in the constellation of Serpens.

σ Serpentis visual magnitude is 4.82. Because of its moderate brightness, σ Serpentis is easily visible to the naked eye from locations with dark skies, while it might be barely visible, or not visible at all, from light-polluted skies.

Image of σ Serpentis (sigma Serpentis) star

DSS2 image of σ Serpentis. The red arrow shows the motion of σ Serpentis during the next 1000 years (-2.58 arcmin in Right Ascension and 0.83 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 16h 23m 22s

Declination +00° 58’ 15”

Hour Angle 01h 45m 38s

Sidereal Time 18h 09m 00s

J2000

Right Ascension 16h 22m 04s

Declination +01° 01’ 45”

Galactic Coordinates

Galactic Longitude 14.78°

Galactic Latitude 33.22°

Finder Chart

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Finder chart for σ Serpentis (sigma Serpentis).

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 4.82

Class Hypergiant

Absolute magnitude 2.64

Spectral Type F0V

Color Index (B-V) 0.34

Temperature 7217K

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

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

Distance, Radial Speed, Proper Motion

σ Serpentis is distant 89.17 light years from the Sun and it is moving towards the Sun at the speed of 50 kilometers per second.

Distance (parsec) 27.35

Distance (light year) 89.17

Radial Speed -50 km/s

Proper Motion RA -0.155 arcsec/y

Proper Motion Dec 0.05"/y

Alternative Designations

Bayer designation σ Serpentis
(sigma Serpentis)

Flamsteed designation 50 Serpentis

Henry Draper Catalogue HD147449

SAO Catalogue SAO121540

Hipparcos Catalogue HIP80179

Durchmusterung Catalogue BD+01 3215

Gliese Catalogue NN 3952

FK5 Catalogue 1427

Visibility from Your Location

Today's σ Serpentis (sigma Serpentis) rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 89.0° RISE 18:37

Max altitude: 39.5° TRANSIT 0:40

Azimuth: 271.0° SET 6:47

Set Location

Other stars in Serpens