δ Hydrae (delta Hydrae)

Below the horizon. Rise: 11:14 | Tran: 17:40 | Set: 0:06

Alt: -31.44° Az: 17.83° Direction: North-North-East

δ Hydrae is a double main-sequence star of spectral class A1 in the constellation of Hydra.

δ Hydrae visual magnitude is 4.16. Because of its moderate brightness, δ 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 δ Hydrae. The red arrow shows the motion of δ Hydrae during the next 10000 years (-11.00 arcmin in Right Ascension and -1.17 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 08h 39m 00s

Declination +05° 36’ 48”

Hour Angle 13h 00m 52s

Sidereal Time 21h 39m 52s

J2000

Right Ascension 08h 37m 39s

Declination +05° 42’ 12”

Galactic Coordinates

Galactic Longitude 220.26°

Galactic Latitude 26.18°

Finder Chart

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Finder chart for δ Hydrae (delta Hydrae).

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 4.16

Class Main-sequence

Absolute magnitude 0.46

Spectral Type A1V

Color Index (B-V) 0

Temperature 10125K

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

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

Star System Properties

δ 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 δ Hydrae double sysyem:

Main star magnitude 4.16

Secondary star magnitude 10.36

Magnitude difference 6.2

Separation 243.7 arcsec

Distance, Radial Speed, Proper Motion

δ Hydrae is distant 179.02 light years from the Sun and it is moving far from the Sun at the speed of 11 kilometers per second.

Distance (parsec) 54.91

Distance (light year) 179.02

Radial Speed 11 km/s

Proper Motion RA -0.066 arcsec/y

Proper Motion Dec -0.007"/y

Alternative Designations

Bayer designation δ Hydrae
(delta Hydrae)

Flamsteed designation 4 Hydrae

Henry Draper Catalogue HD73262

SAO Catalogue SAO116965

Hipparcos Catalogue HIP42313

Durchmusterung Catalogue BD+06 2001

FK5 Catalogue 1223

Visibility from Your Location

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

Azimuth: 84.4° RISE 11:14

Max altitude: 44.1° TRANSIT 17:40

Azimuth: 275.6° SET 0:06

Set Location

Other stars in Hydra