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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
north SunriseRise: 7:40  
clear_day Transit: 11:47  
SunsetSet: 15:53 south
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All Constellations » Hydra » 

19 Hydrae

Altitude: -17.7°   Azimuth: 81.5°   Direction: East

19 Hydrae is a double giant star in the constellation of Hydra.

19 Hydrae visual magnitude is 5.6. Because of its reltive faintness, 19 Hydrae should be visible only from locations with dark skyes, while it is not visible at all from skyes affected by light pollution.

The table below summarizes the key facts about 19 Hydrae:


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

Altitude: -17.7°
Azimuth: 81.5°
Direction: East

Celestial coordinates and finder chart of 19 Hydrae

19 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 19 Hydrae are provided in the following table:

09h 08m 42s
-08° 35’ 21”

The simplified sky map below shows the position of 19 Hydrae in the sky:

Finder chart 19 Hydrae star
Simplified finder chart for 19 Hydrae.

Visibility of 19 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 19 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: 98.6°
Max altitude: 29.9°
Azimuth: 261.4°

Digitized Sky Survey image of 19 Hydrae

The image below is a photograph of 19 Hydrae from the Digitized Sky Survey 2 (DSS2 - see the credits section) taken in the red channel. The area of sky represented in the image is 0.5x0.5 degrees (30x30 arcmins). The proper motion of 19 Hydrae is -0.019 arcsec per year in Right Ascension and -0.002 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of 19 Hydrae star
DSS2 image of 19 Hydrae. The red arrow shows the motion of 19 Hydrae during the next 10000 years (-3.17 arcmin in Right Ascension and -0.33 arcmin in declination);

Distance of 19 Hydrae from the Sun and relative movement

19 Hydrae is distant 898.07 light years from the Sun and it is moving far from the Sun at the speed of 23 kilometers per second.

275.48 pc
898.07 ly
23 km/s
-0.019 arcsec/year
-0.002 arcsec/year

Spectral properties of 19 Hydrae

19 Hydrae belongs to spectral class B9 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where 19 Hydrae is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 19 Hydrae. Attribution: Richard Powell / CC BY-SA

19 Hydrae star system properties

19 Hydrae is a visual double star which can be observed with the help of large telescopes. The table below shows key information about the 19 Hydrae double sysyem:

1 arcsec

Alternative designations of 19 Hydrae