51 Hydrae

Altitude: 5.6° Azimuth: 208.9° Direction: South-South-West

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:

Color of 51 Hydrae ⬤

Magnitude of 51 Hydrae 4.77

Class Giant

VISIBILITY RIGHT NOW

51 Hydrae is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 5.6°
Azimuth: 208.9°
Direction: South-South-West

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 hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of 51 Hydrae are provided in the following table:

Right Ascension J2000 14h 23m 05s

Declination J2000 -27° 45’ 14”

Galactic Longitude 326.6°

Galactic Latitude 30.87°

Constellation Hydra

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

Simplified finder chart for 51 Hydrae.

Visibility of 51 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 51 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: 117.8° RISE 6:37

Max altitude: 10.8° TRANSIT 9:50

Azimuth: 242.2° SET 13:04

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.

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.

Distance (parsec) 53.56 pc

Distance (light year) 174.61 ly

Heliocentric radial velocity 20 km/s

Proper Motion RA -0.193 arcsec/year

Proper Motion Dec -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.

Absolute magnitude 1.13

Spectral Type K4III

Color Index (B-V) 1.31

Temperature of 51 Hydrae 4104K

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

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

Alternative designations of 51 Hydrae

Flamsteed designation 51 Hydrae

Henry Draper Catalogue HD125932

SAO Catalogue SAO182483

Hipparcos Catalogue HIP70306

Durchmusterung Catalogue CD-27 9803

General Catalogue of Variable Stars 6648

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