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public  Greenwich, UK Greenwich, UK  ⓘ
TimezoneEurope/London
Sunrise: 7:27 
Transit: 12:14 
Sunset: 17:01
wb_twilight   (Nautical Twilight)  
What's Visible Now • Tonight Timeline
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All Constellations » Hydra » 

23 Hydrae

Below the horizon.  Rise: 18:35 | Tran: 0:04 | Set: 5:30
Alt: -11.62°   Az: 274.24°   Direction: West

23 Hydrae is a double giant star of spectral class K2 in the constellation of Hydra.

23 Hydrae visual magnitude is 5.24. Because of its faintness, 23 Hydrae is visible to the naked eye only from locations with very dark skies, while it is not visible at all from skies affected by light pollution.

Image of 23 Hydrae star
DSS2 image of 23 Hydrae. The red arrow shows the motion of 23 Hydrae during the next 10000 years (4.00 arcmin in Right Ascension and 1.00 arcmin in declination);

Celestial Coordinates

Apparent

09h 17m 56s
-06° 27’ 32”
06h 42m 15s
16h 00m 11s

J2000

09h 16m 41s
-06° 21’ 11”

Galactic Coordinates

237.54°
28.25°

Finder Chart

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Finder chart for 23 Hydrae.

Magnitude, Color, Spectral Class

5.24
Giant

0.58
K2III
4368K

The red dot in the diagram below shows where 23 Hydrae is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 23 Hydrae. Attribution: Richard Powell / CC BY-SA

Star System Properties

23 Hydrae is a visual double star which can be observed with the help of medium or large telescopes. The table below shows key information about the 23 Hydrae double sysyem:

5.24
10.84
5.6
1.6 arcsec

Distance, Radial Speed, Proper Motion

23 Hydrae is distant 278.63 light years from the Sun and it is moving towards the Sun at the speed of 8 kilometers per second.

85.47
278.63
-8 km/s
0.024 arcsec/y
0.006"/y

Alternative Designations

SAO136725
SAO136725

Visibility from Your Location

Today's 23 Hydrae rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 96.5°
Max altitude: 32.1°
Azimuth: 263.5°