γ Hydrae (gamma Hydrae)

Below the horizon. Rise: 14:50 | Tran: 21:00 | Set: 3:10

Alt: -33.65° Az: 124.09° Direction: South-East

γ Hydrae is a variable and double giant star of spectral class G8 in the constellation of Hydra.

γ Hydrae visual magnitude is 3. Because of its brightness, γ Hydrae is clearly visible to the naked eye when observed from locations with dark skies, and should be also quite easily visible from light polluted areas.

DSS2 image of γ Hydrae. The red arrow shows the motion of γ Hydrae during the next 10000 years (10.67 arcmin in Right Ascension and -7.50 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 13h 20m 18s

Declination -23° 18’ 16”

Hour Angle 15h 14m 34s

Sidereal Time 04h 34m 52s

J2000

Right Ascension 13h 18m 55s

Declination -23° 10’ 18”

Galactic Coordinates

Galactic Longitude 311.1°

Galactic Latitude 39.26°

Finder Chart

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Finder chart for γ Hydrae (gamma Hydrae).

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 3

Class Giant

Absolute magnitude -0.04

Spectral Type G8III

Color Index (B-V) 0.92

Temperature 4943K

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

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

Star System Properties

γ 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 γ Hydrae double sysyem:

Main star magnitude 3

Secondary star magnitude 9.7

Magnitude difference 6.7

Separation 138.4 arcsec

Distance, Radial Speed, Proper Motion

γ Hydrae is distant 132.04 light years from the Sun and it is moving towards the Sun at the speed of 5 kilometers per second.

Distance (parsec) 40.50

Distance (light year) 132.04

Radial Speed -5 km/s

Proper Motion RA 0.064 arcsec/y

Proper Motion Dec -0.045"/y

Alternative Designations

Bayer designation γ Hydrae
(gamma Hydrae)

Flamsteed designation 46 Hydrae

Henry Draper Catalogue HD115659

SAO Catalogue SAO181543

Hipparcos Catalogue HIP64962

Durchmusterung Catalogue BD-22 3554

FK5 Catalogue 495

General Catalogue of Variable Stars 6180

Visibility from Your Location

Today's γ Hydrae (gamma Hydrae) rise, transit and set times from Semarang, Indonesia are the following (all times relative to the local timezone Asia/Jakarta):

Azimuth: 113.3° RISE 14:50

Max altitude: 73.7° TRANSIT 21:00

Azimuth: 246.7° SET 3:10

Name:	Semarang, Indonesia
Latitude:	6° 59' 35.5" S
Longitude:	110° 25' 12.0" E
Timezone:	Asia/Jakarta

Set Location

Other stars in Hydra