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A Complete Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
SunriseRise: 6:52  
clear_day Transit: 12:11  
SunsetSet: 17:31
sunny DaytimeWhat's Visible Now?
All Constellations » Hydra » 

20 Hydrae

Altitude: -32.7°   Azimuth: 301.0°   Direction: West-North-West

20 Hydrae is a bright giant star in the constellation of Hydra.

20 Hydrae visual magnitude is 5.46. Because of its reltive faintness, 20 Hydrae should be visible only from locations with dark skies, while it is not visible at all from skies affected by light pollution.

The proper motion of 20 Hydrae is -0.019 arcsec per year in Right Ascension and -0.01 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of 20 Hydrae star
DSS2 image of 20 Hydrae. The red arrow shows the motion of 20 Hydrae during the next 10000 years (-3.17 arcmin in Right Ascension and -1.67 arcmin in declination);

Key facts about 20 Hydrae

Bright giant

20 Hydrae is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -32.7°
Azimuth: 301.0°
Direction: West-North-West

Celestial coordinates and finder chart of 20 Hydrae

20 Hydrae is situated close to the celestial equator, as such, it is at least partly visible from both hemispheres in certain times of the year. Celestial coordinates for the J2000 equinox as well as galactic coordinates of 20 Hydrae are provided in the following table:

09h 09m 35s
-08° 47’ 16”

The simplified sky map below shows the position of 20 Hydrae in the sky:

Finder chart 20 Hydrae star
Simplified finder chart for 20 Hydrae.

Visibility of 20 Hydrae from your location

Location: Greenwich, United Kingdom edit_location_alt
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

Today's 20 Hydrae rise, transit and set times from Greenwich, United Kingdom edit_location_alt are the following (all times relative to the local timezone Europe/London):

Azimuth: 98.8°
Max altitude: 29.7°
Azimuth: 261.2°

Distance of 20 Hydrae from the Sun and relative movement

20 Hydrae is distant 641.73 light years from the Sun and it is moving far from the Sun at the speed of 26 kilometers per second.

196.85 pc
641.73 ly
26 km/s
-0.019 arcsec/year
-0.01 arcsec/year

Spectral properties of 20 Hydrae

20 Hydrae belongs to spectral class G8 and has a luminosity class of II corresponding to a bright giant star.


The red dot in the diagram below shows where 20 Hydrae is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 20 Hydrae. Attribution: Richard Powell / CC BY-SA

Alternative designations of 20 Hydrae