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public  Greenwich, UK Greenwich, UK  ⓘ
TimezoneEurope/London
Sunrise: 7:25 
Transit: 12:14 
Sunset: 17:03
wb_twilight   (Astronomical Twilight)  
What's Visible Now • Tonight Timeline
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All Constellations » Hydra » 

β Hydrae (beta Hydrae)

Below the horizon.  Rise: 0:29 | Tran: 2:36 | Set: 4:43
Alt: -7.41°   Az: 222.00°   Direction: South-West

β Hydrae is a variable and double giant star of spectral class B9 in the constellation of Hydra.

β Hydrae visual magnitude is 4.28. Because of its moderate brightness, β 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.

Image of β Hydrae (beta Hydrae) star
DSS2 image of β Hydrae. The red arrow shows the motion of β Hydrae during the next 10000 years (-8.33 arcmin in Right Ascension and 0.83 arcmin in declination);

Celestial Coordinates

Apparent

11h 54m 11s
-34° 02’ 52”
03h 32m 50s
15h 27m 01s

J2000

11h 52m 54s
-33° 54’ 29”

Galactic Coordinates

289.27°
27.41°

Finder Chart

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Finder chart for β Hydrae (beta Hydrae).

Magnitude, Color, Spectral Class

4.28
Giant
β Hydrae is also a Si chemically peculiar star.

-0.97
B9III
11573K

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

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

Star System Properties

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

4.28
5.18
0.9
0.8 arcsec

Distance, Radial Speed, Proper Motion

β Hydrae is distant 365.06 light years from the Sun and it is moving towards the Sun at the speed of 1 kilometers per second.

111.98
365.06
-1 km/s
-0.05 arcsec/y
0.005"/y

Alternative Designations

β Hydrae
(beta Hydrae)
SAO202901
SAO202901

Visibility from Your Location

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

Azimuth: 124.0°
Max altitude: 4.5°
Azimuth: 236.0°