ξ Serpentis (xi Serpentis)

Below the horizon. Rise: 17:50 | Tran: 23:21 | Set: 4:52

Alt: -2.57° Az: 105.67° Direction: East-South-East

ξ Serpentis is a variable and double hypergiant star of spectral class F0 in the constellation of Serpens.

ξ Serpentis visual magnitude is 3.54. Because of its moderate brightness, ξ 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 ξ Serpentis (xi Serpentis) star

DSS2 image of ξ Serpentis. The red arrow shows the motion of ξ Serpentis during the next 10000 years (-7.00 arcmin in Right Ascension and -9.67 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 17h 39m 02s

Declination -15° 24’ 43”

Hour Angle 18h 15m 22s

Sidereal Time 11h 54m 25s

J2000

Right Ascension 17h 37m 35s

Declination -15° 23’ 54”

Galactic Coordinates

Galactic Longitude 10.61°

Galactic Latitude 8.66°

Finder Chart

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Finder chart for ξ Serpentis (xi Serpentis).

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 3.54

Class Hypergiant

Absolute magnitude 0.99

Spectral Type F0IV

Color Index (B-V) 0.26

Temperature 7726K

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

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

Star System Properties

ξ Serpentis is a visual double star which can be observed only with the help of very large telescopes. The table below shows key information about the ξ Serpentis double sysyem:

Main star magnitude 3.54

Secondary star magnitude 12.94

Magnitude difference 9.4

Separation 22 arcsec

Distance, Radial Speed, Proper Motion

ξ Serpentis is distant 105.40 light years from the Sun and it is moving towards the Sun at the speed of 43 kilometers per second.

Distance (parsec) 32.33

Distance (light year) 105.40

Radial Speed -43 km/s

Proper Motion RA -0.042 arcsec/y

Proper Motion Dec -0.058"/y

Alternative Designations

Bayer designation ξ Serpentis
(xi Serpentis)

Flamsteed designation 55 Serpentis

Henry Draper Catalogue HD159876

SAO Catalogue SAO160700

Hipparcos Catalogue HIP86263

Durchmusterung Catalogue BD-15 4621

FK5 Catalogue 658

General Catalogue of Variable Stars 9270

Visibility from Your Location

Today's ξ Serpentis (xi Serpentis) rise, transit and set times from Hongshan, China are the following (all times relative to the local timezone Asia/Shanghai):

Azimuth: 105.4° RISE 17:50

Max altitude: 51.5° TRANSIT 23:21

Azimuth: 254.6° SET 4:52

Name:	Hongshan, China
Latitude:	23° 6' 9.0" N
Longitude:	113° 27' 57.6" E
Timezone:	Asia/Shanghai

Set Location

Other stars in Serpens