Your guide to the Solar System and the night sky
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🌎  Observing from: Greenwich, United Kingdom [change]

51 Hydrae

51 Hydrae is a variable giant star in the constellation of Hydra.

51 Hydrae visual magnitude is 4.77. Because of its moderate brightness, 51 Hydrae should be easily visible from locations with dark skyes, while it can be barely visible, or not visible at all, from skyes affected by light pollution.

The table below summarizes the key facts about 51 Hydrae:

51 Hydrae is below the horizon from Greenwich, United Kingdom [change].

Celestial coordinates and finder chart of 51 Hydrae

51 Hydrae is situated south of the celestial equator, as such, it is more easily visible from the southern emisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of 51 Hydrae are provided in the following table:

14h 23m 05s
-27° 45’ 14”

The simplified sky map below shows the position of 51 Hydrae in the sky:

Finder chart 51 Hydrae star
Simplified finder chart for 51 Hydrae.

Visibility of 51 Hydrae from your location

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

Today's 51 Hydrae rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 117.8°
Max altitude: 10.8°
Azimuth: 242.2°
51 Hydrae is below the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of 51 Hydrae

The image below is a photograph of 51 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 51 Hydrae is -0.193 arcsec per year in Right Ascension and -0.112 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of 51 Hydrae star
DSS2 image of 51 Hydrae. The red arrow shows the motion of 51 Hydrae during the next 1000 years (-3.22 arcmin in Right Ascension and -1.87 arcmin in declination);

Distance of 51 Hydrae from the Sun and relative movement

51 Hydrae is distant 174.61 light years from the Sun and it is moving far from the Sun at the speed of 20 kilometers per second.

53.56 pc
174.61 ly
20 km/s
-0.193 arcsec/year
-0.112 arcsec/year

Spectral properties of 51 Hydrae

51 Hydrae belongs to spectral class K4 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where 51 Hydrae is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 51 Hydrae. Attribution: Richard Powell / CC BY-SA

Alternative designations of 51 Hydrae