9 Hydrae

Below the horizon. Rise: 11:16 | Tran: 15:50 | Set: 20:24

Alt: -48.06° Az: 317.26° Direction: North-West

9 Hydrae is a double giant star of spectral class G9 in the constellation of Hydra.

9 Hydrae visual magnitude is 4.88. Because of its moderate brightness, 9 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 9 Hydrae. The red arrow shows the motion of 9 Hydrae during the next 1000 years (0.02 arcmin in Right Ascension and -1.63 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 08h 42m 54s

Declination -16° 02’ 07”

Hour Angle 10h 07m 20s

Sidereal Time 18h 50m 14s

J2000

Right Ascension 08h 41m 43s

Declination -15° 56’ 35”

Galactic Coordinates

Galactic Longitude 240.63°

Galactic Latitude 15.71°

Finder Chart

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Finder chart for 9 Hydrae.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 4.88

Class Giant

Absolute magnitude 0.90

Spectral Type G9III

Color Index (B-V) 1.06

Temperature 4603K

The red dot in the diagram below shows where 9 Hydrae is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 9 Hydrae. Attribution: Richard Powell / CC BY-SA

Star System Properties

9 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 9 Hydrae double sysyem:

Main star magnitude 4.88

Secondary star magnitude 11.68

Magnitude difference 6.8

Separation 31 arcsec

Distance, Radial Speed, Proper Motion

9 Hydrae is distant 204.01 light years from the Sun and it is moving towards the Sun at the speed of 2 kilometers per second.

Distance (parsec) 62.58

Distance (light year) 204.01

Radial Speed -2 km/s

Proper Motion RA 0.001 arcsec/y

Proper Motion Dec -0.098"/y

Alternative Designations

Flamsteed designation 9 Hydrae

Henry Draper Catalogue HD74137

SAO Catalogue SAO154552

Hipparcos Catalogue HIP42662

Durchmusterung Catalogue BD-15 2554

FK5 Catalogue 2684

Aitken Double Star Catalogue ADS6937

Visibility from Your Location

Today's 9 Hydrae rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 106.0° RISE 11:16

Max altitude: 22.5° TRANSIT 15:50

Azimuth: 254.0° SET 20:24

Set Location

Other stars in Hydra