ξ Hydrae (xi Hydrae)

Below the horizon. Rise: 17:31 | Tran: 20:04 | Set: 22:36

Alt: -5.16° Az: 137.81° Direction: South-East

ξ Hydrae is a double giant star of spectral class G7 in the constellation of Hydra.

ξ Hydrae visual magnitude is 3.54. Because of its moderate brightness, ξ Hydrae 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.

DSS2 image of ξ Hydrae. The red arrow shows the motion of ξ Hydrae during the next 1000 years (-3.43 arcmin in Right Ascension and -0.67 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 11h 34m 15s

Declination -31° 59’ 53”

Hour Angle 20h 31m 43s

Sidereal Time 08h 05m 58s

J2000

Right Ascension 11h 33m 00s

Declination -31° 51’ 28”

Galactic Coordinates

Galactic Longitude 284.08°

Galactic Latitude 28.13°

Finder Chart

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Finder chart for ξ Hydrae (xi Hydrae).

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 3.54

Class Giant

Absolute magnitude 0.55

Spectral Type G7III

Color Index (B-V) 0.94

Temperature 4892K

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

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

Star System Properties

ξ Hydrae 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 Hydrae double sysyem:

Main star magnitude 3.54

Secondary star magnitude 10.54

Magnitude difference 7

Separation 68.2 arcsec

Distance, Radial Speed, Proper Motion

ξ Hydrae is distant 129.21 light years from the Sun and it is moving towards the Sun at the speed of 5 kilometers per second.

Distance (parsec) 39.64

Distance (light year) 129.21

Radial Speed -5 km/s

Proper Motion RA -0.206 arcsec/y

Proper Motion Dec -0.04"/y

Alternative Designations

Bayer designation ξ Hydrae
(xi Hydrae)

Henry Draper Catalogue HD100407

SAO Catalogue SAO202558

Hipparcos Catalogue HIP56343

Durchmusterung Catalogue CD-31 9083

FK5 Catalogue 434

Visibility from Your Location

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

Azimuth: 122.0° RISE 17:31

Max altitude: 6.5° TRANSIT 20:04

Azimuth: 238.0° SET 22:36

Set Location

Other stars in Hydra