47 Hydrae

47 Hydrae is a main-sequence star in the constellation of Hydra.

47 Hydrae visual magnitude is 5.15. Because of its reltive faintness, 47 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 47 Hydrae:

Color of 47 Hydrae ⬤

Magnitude of 47 Hydrae 5.15

Class Main-sequence

VISIBILITY RIGHT NOW 47 Hydrae is above the horizon from Greenwich, United Kingdom edit_location_alt. Altitude: 11°.

Celestial coordinates and finder chart of 47 Hydrae

47 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 47 Hydrae are provided in the following table:

Right Ascension J2000 13h 58m 31s

Declination J2000 -24° 58’ 19”

Galactic Longitude 321.66°

Galactic Latitude 35.45°

Constellation Hydra

The simplified sky map below shows the position of 47 Hydrae in the sky:

Simplified finder chart for 47 Hydrae.

Visibility of 47 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 47 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: 115.0° RISE 18:46

Max altitude: 13.5° TRANSIT 22:22

Azimuth: 245.0° SET 2:01

RIGHT NOW 47 Hydrae is above the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of 47 Hydrae

The image below is a photograph of 47 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 47 Hydrae is -0.049 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 47 Hydrae. The red arrow shows the motion of 47 Hydrae during the next 10000 years (-8.17 arcmin in Right Ascension and -4.83 arcmin in declination);

Distance of 47 Hydrae from the Sun and relative movement

47 Hydrae is distant 339.23 light years from the Sun and it is moving far from the Sun at the speed of 5 kilometers per second.

Distance (parsec) 104.06 pc

Distance (light year) 339.23 ly

Heliocentric radial velocity 5 km/s

Proper Motion RA -0.049 arcsec/year

Proper Motion Dec -0.029 arcsec/year

Spectral properties of 47 Hydrae

47 Hydrae belongs to spectral class B8 and has a luminosity class of V corresponding to a main-sequence star. 47 Hydrae is also a Sh chemically peculiar star.

Absolute magnitude 0.06

Spectral Type B8V

Color Index (B-V) -0.1

Temperature of 47 Hydrae 11573K

The red dot in the diagram below shows where 47 Hydrae is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 47 Hydrae. Attribution: Richard Powell / CC BY-SA

Alternative designations of 47 Hydrae

Flamsteed designation 47 Hydrae

Henry Draper Catalogue HD121847

SAO Catalogue SAO182134

Hipparcos Catalogue HIP68269

Durchmusterung Catalogue CD-2411202

FK5 Catalogue 515

In Evidence

Other stars in Hydra