27 Hydrae

Altitude: -16.7° Azimuth: 275.7° Direction: West

27 Hydrae is a multiple giant star in the constellation of Hydra.

27 Hydrae visual magnitude is 4.8. Because of its moderate brightness, 27 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 27 Hydrae:

Color of 27 Hydrae ⬤

Magnitude of 27 Hydrae 4.8

Class Giant

VISIBILITY RIGHT NOW

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

Altitude: -16.7°
Azimuth: 275.7°
Direction: West

Celestial coordinates and finder chart of 27 Hydrae

27 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 27 Hydrae are provided in the following table:

Right Ascension J2000 09h 20m 29s

Declination J2000 -09° 33’ 20”

Galactic Longitude 241.08°

Galactic Latitude 27.11°

Constellation Hydra

The simplified sky map below shows the position of 27 Hydrae in the sky:

Simplified finder chart for 27 Hydrae.

Visibility of 27 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 27 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: 99.6° RISE 23:12

Max altitude: 29.0° TRANSIT 4:25

Azimuth: 260.4° SET 9:35

Digitized Sky Survey image of 27 Hydrae

The image below is a photograph of 27 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 27 Hydrae is -0.014 arcsec per year in Right Ascension and -0.029 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of 27 Hydrae. The red arrow shows the motion of 27 Hydrae during the next 10000 years (-2.33 arcmin in Right Ascension and -4.83 arcmin in declination);

Distance of 27 Hydrae from the Sun and relative movement

27 Hydrae is distant 243.47 light years from the Sun and it is moving far from the Sun at the speed of 25 kilometers per second.

Distance (parsec) 74.68 pc

Distance (light year) 243.47 ly

Heliocentric radial velocity 25 km/s

Proper Motion RA -0.014 arcsec/year

Proper Motion Dec -0.029 arcsec/year

Spectral properties of 27 Hydrae

27 Hydrae belongs to spectral class G8 and has a luminosity class of III corresponding to a giant star.

Absolute magnitude 0.43

Spectral Type G8III

Color Index (B-V) 0.93

Temperature of 27 Hydrae 4917K

The red dot in the diagram below shows where 27 Hydrae is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 27 Hydrae. Attribution: Richard Powell / CC BY-SA

27 Hydrae star system properties

27 Hydrae is a visual double star which can be observed with binoculars or small telescopes. The table below shows key information about the 27 Hydrae double sysyem:

Main star magnitude 4.8

Secondary star magnitude 6.7

Magnitude difference 1.9

Separation 231.8 arcsec

Alternative designations of 27 Hydrae

Flamsteed designation 27 Hydrae

Henry Draper Catalogue HD80586

SAO Catalogue SAO136768

Hipparcos Catalogue HIP45811

Durchmusterung Catalogue BD-08 2643

Aitken Double Star Catalogue ADS7311

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